Partial moment connection. Perhaps the first U.
Partial moment connection Oct 4, 2018 · Partial fixity end releases can be utilized in RISA to model the behavior of a partially restrained or semi-rigid connection that cannot be idealized as fully fixed or pinned. 6: Moment Connections for Continuous Framing. Dec 13, 2000 · I cannot model partial moment connections in the software I have. What comes to mind is increased deflection and p-delta effects. examined the development of a moment connection with bolted ductile double T-stub fuses. THis is basically a connection where you define a percentage of fixity rather than a spring constant. We hypothesize that PERFORMANCE OF PARTIAL PENETRATION WELDS IN SEISMIC MOMENT CONNECTIONS H. Lapped Plates. May 1, 2010 · This paper presents development of a simplified procedure for seismic evaluation of piles with partial-moment connection typically used in marine oil terminals. Part 11: Moment Connections 11 - 1 1 INTRODUCTION Manual design of moment-resisting bolted connections is laborious, particularly when there are several bolt rows acting in tension. Wang et al. Carefully examine cantilever framing for reducing the number of members with moment connections. However, I have a situation where my factored moment is only 10% of the moment capacity of the weaker member being Apr 29, 2012 · For steelwork, if the connection is capable of transferring 50% of the moment capacity of the weakest member at the connection the I assume the connection rigid (this is my rule so use with caution). 0. partial-moment-connection. 10 Member-end Releases Lecture 11. 3. Because there are no prequalified connections available for use in com-posite moment frames, the discussion provides references and a Design Criteria for Moment Connections. ) With this connection, the beam is not directly connected to the face of Lecture 11. Fully fixed (cantilever end) - Denotes a cantilever end. the initial (elastic) stiffness, the plastic moment capacity and the strain‐hardening stiffness of the connection. TAHERI1; G. This defines what level of ductility (OMF, IMF, SMF, OCBF, SCBF) will define your connection and, if it is a seismic moment connection, which predesignated type (RBS, WUF-W, BFP, BEEP, etc. 99 value in partial moment release would mean that 99% of the moment carrying capacity at that member end has been released. This guide centralizes AISC’s existing design procedures for end-plate moment connections (Design Guides 4, 16, and AISC 358-22 Chapter 6) into a single consistent document. (2020) as the Feb 13, 2019 · What is a moment connection? Any connection that has the capacity to transfer moment between the structural members (two or more) is defined as moment connection. CSA: D (Ductile Moment-Resisting Frame), MD (Moderately Ductile Moment-Resisting Frame), LD (Limited Ductility Moment-Resisting Frame) can be specified for moment resisting BCF RAM | STAAD Forum - partial moment release, moment release, STAAD, Partially Restrained Moment Connection - When setting partial moment releases at beam ends in STAAD, specifically for a moment frame, how does this impact the beam's moment-rotation relationship? The test specimens were tested in accordance with the 2010 AISC Seismic Provision’s criteria on cyclic loading sequences for beam to column moment connections. For constructability the beam column joint is bolted and the design only requires partial moment connection as the lateral resistance is coming from the cantilevered posts. Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications The prequalified connections standard has been developed by the AISC Connection Prequalification Review Panel in accordance with Chapter K of the Seismic Provisions for Structural Steel Buildings . Use your partial penetration weld and be done. Nov 13, 2009 · This paper presents development of a simplified procedure for seismic evaluation of piles with partial-moment connection typically used in marine oil terminals. Quality control and quality assurance are important for the achievement of the intended performance. Butt Welded Moment Connection. rotation graph and tangent to the first portion of the slope. This is the best way to save Oct 1, 1998 · Partially restrained composite connections (PR-CC) are partial strength connections that can be used to resist moments induced by live, wind, and earthquake loads in low and moderate height unbraced frames. Benefits of Moment Connection Welds in Construction. There is no easy way to justify using a partial moment connection to save money. Aug 26, 2010 · Select members 3 and 5, then use the Assign > Frame > Releases/Partial Fixity command to assign moment M33 end releases to member start-joints. Three basic types of construction and associated design assumptions are permissible under the respective conditions stated herein, and each will govern in 26. bentley. The design strength of a moment connection may be full- strength (i. Perhaps the first U. Slopes of these models are graphically determined and used to define connection rigidities. Below is the definition of PR connections per AISC specifications. RAM | STAAD Forum - partial moment release, moment release, STAAD, Partially Restrained Moment Connection - When setting partial moment releases at beam ends in STAAD, specifically for a moment frame, how does this impact the beam's moment-rotation relationship? tion never went through a moment re-versal. In past ASD specifications, these connections were called semi-rigid connections. moment frames, composite special moment frames and com-posite partially restrained moment frames; a section on connec-tion design for these types of systems is also included. Conjugate beam. 1) Traditionally, when we design composite beams, we do them as pinned-pinned connections that don't have negative moments. 1) to approximate the resulting simple beam deflections? Dec 24, 2024 · Benefits: Moment connection welds are an essential part of seismic-resistant designs, as they contribute to the building’s ability to withstand seismic forces without failure. The current seismic evaluation procedure of the piles in marine oil terminals includes monitoring material strains specified in the Marine Oil Terminal Engineering and Maintenance Standard (MOTEMS) during the nonlinear static pushover Nov 17, 2022 · A fundamental misunderstanding of connection design and the underlying component model used in the SCI Green Book for moment connections coupled with a lack of understanding of the implication of applying partial fixities/rotational springs in frame models. And partially restrained connection is one Learn more about this webinar including accessing the course slides and receiving PDH credit at: https://www. 1 in SCI AD305 [11] shows the deformation due to the moment-rotation relationship of a beam This session will address wind and low-seismic moment connection design. Moment (pin My) - Minor axis moment connection, and pinned about the major axis. Moment end-plates May 30, 2012 · 1- First you need to calculate the stiffness of the FULLY FIXED support and this calculated as k=4EI/L. Fig. extended end-plate bolted connection, which functions as a semi-rigid, partial-strength beam-to-column connection. We employ the idea of downside realized partial moment ( 𝑃 −) and upside realized partial moment ( 𝑃 +) in the context of momentum trading strategies. Commentary: FEMA-353 has a complete discussion of quality control recommendations and the reasons for them. These connections are often used in situations where cost and construction time need to be minimized, as they are Feb 22, 2022 · Any connection , specially steel connection has different classification of depending on the connection rigidity. CHAPTER 6 - SEISMIC MOMENT CONNECTIONS By Egor P. Any iteration of connection geometry or connection component (such as changing the bolt setting out or bolt size) necessitates a full re-design. Design shall be based on AISC SPSSB Section E1. Full Putt Moment. com URL will be redirected to InfrastructureCloud. IntroductionThe design approach in Eurocode 4 [1] and BS 5950 [2] requires that full shear connection be provided in the hogging moment regions of composite structures. While not as rigid as full-depth connections, partial-depth connections can still effectively transfer bending moments and shear forces . I have called for square butt with 1/4" pp weld. Jun 21, 2007 · Partially restrained connections resist moment and also allow rotation. Select joint 4, the point of pin connection, then use the Edit > Edit Points > Disconnect command to create four separate joints at this location, one for each of the coincident members. The worked examples and Apr 22, 2021 · As we mentioned earlier, the moment connections are not suitable for open sections only. For these reasons, the Assign the connection with a Seismic Design Rule in RISA-3D. 0) cross-connections when the moment is equilibrated by each branch of the cross-connection. When you assign full moment release, you are assuming no moment will be transferred through that joint. It describes the The moment connection is more of a partially restrained moment connection that has the potential to see some rotation depending on the thickness of the HSS wall. (A schematic of the connection, when used with planar moment frames, is shown in Figure 2. If the connection is designed for this factored moment, can I really expect the stiffness Aug 5, 2024 · Moment (pin Mz) - Major axis moment connection, and pinned about the minor axis. These connections are mainly designed to resist gravity, wind, and low to moderate seismic loads. FMC essentially provide Jun 12, 2020 · QUESTION I typically try to avoid specifying full moment connections and instead list the factored moment that I require from a connection in an effort to decrease the steel costs. In elastoplastic designs and nonlinear system-level The moment clips are designed to resist horizontal, torsional and vertical (uplift) loads. Popov Jun 19, 2013 · I'm talking fully fixed, not the partial / flexible moment connections. P. SUMMARY. Similarly the stiffness of a moment connection can be rigid or Apr 6, 2024 · Welded Connection Formulas. 13. The use of moment connection welds offers a wide range of benefits, both in terms of performance and cost Jun 22, 2023 · AbstractSemirigid bolted endplate moment connections are widely used in construction practice. Dec 19, 2005 · Absent of seismic connections requiring a strength greater than the member capacity, I don't know of any reason why the connection would need to be designed for more than the actual design moment. For best results, choose an HSS column with a thick wall to best transfer moment or axial forces through the connection. Complete joint penetration groove welds of beam The literature has further shown that momentum returns are related to partial moments, especially lower partial moments 5. See FEMA 356 for more info. I am trying to determine the negative effects this would have on my frame, since it was modeled at 100% fixed. These connections are categorized as fully restrained (Type FR) or partially restrained (Type PR), each with distinct behaviors. Connection Strength: The maximum moment the connection is capable of carrying. 3: Particular Aspects in Bolted Connections. So do we have any options? Yes, we do: Continuous Beam Over HSS Column Connections; Through-Plate Moment Connections; Cut-out / Collared Plate Moment Connections; Welded Tee Flange Moment Dec 21, 2024 · Partial penetration welded moment connections can be a good choice for less demanding applications but may not perform as well under extreme loads or bending moments. Comparison is made to a series of test results for a range of bolted end‐plate moment connections. Feb 3, 2004 · Are you looking at how to design them or model them? We typically model them in STAAD using what they called partial moment releases. 5-12 The word "composite" is used to indicate that this connection engages the reinforcing steel in the concrete slab to form the top portion of the moment resisting mechanism under both May 6, 2024 · occur at the point where the end moment and the center line moment would be the same, a connection with a value of u — 0. A moment connection is a type of joint that acts to prevent this turning force, transferring the energy away and keeping two beams solidly in place. The model recognizes the bounds within which the relationship must lie, viz. Rigid connections, end plates, bolted flange plates, and welded moment connections are classified according to rotational rigidity, and rotational stiffness ratios are defined in the earthquake code depending on the ductility level. A moment is the force that tries to pull on a beam or other object to rotate it. INTRODUCTION Moment resisting frames are among one of the most popular structural configurations used in different building structures in their versatility to provide open facades and continuous interior spaces. Jan 20, 2019 · #ilgarante #sap2000 #tutorialsap2000 well as two additional prequalified moment connections: the Simpson Strong Frame moment connection (Chapter 12) and the double-tee moment connection (Chapter 13). For several years there has been extensive study of the behavior of connections that exhibit some moment restraint while also exhibiting some rotation. A moment end-plate connection is designed as a fully restrained (FR) moment connection. 13 Other Structural Connections 2. In "simple" and "semi-rigid" connections, also shown in this figure, primary attention focuses on the stiffness of the connection (the elastic slope of the moment-rotation curves in Fig. Avoid weak-axis moment connections at W-columns. Unfortunately, any slight deviation from this value Mc w !)"• {a) 'fia ' 3Ei 1 1 1 •MconL RJ ' M M El Fig. CLIFTON2; P. Jun 1, 2019 · For stiffness classification, the initial rotational stiffness has to be determined by the moment-rotation relationship, i. com. 2 in February 2014. Aribert and Lachal [2] and Bode et al. 6. Accurately determining the moment-rotation relationship and connection stiffness is of utmost importance for semi-rigid connections. I. In order to fulfil the required Moment connections are classified as rigid and full/partial strength connections. B. 3 provides a simplified method for adjusting frame stiffness to account for partially restrained connections. 4. Topic Partially Restrained Moment Connection May 1, 2010 · This paper presents development of a simplified procedure for seismic evaluation of piles with partial-moment connection typically used in marine oil terminals. I'm not actually looking to use a moment frame in my lateral design and I want to see with the partial fixity at those connections if the load getting into them versus the braced frames would be small enough that existing gravity controlled members would be sufficient. Thomas Ferrell in Modern Steel Construction. [11] have reported studies on using partial shear connection in a composite joint system. For Extended End Plate moment connections the horizontal fillet distance of the beam (k 1) is not counted for the 'inside' flange fillet welds, as it is impossible to weld in these There are cases, however, when the connection may not be able to develop full continuity of the connecting members, or when the moment at a connection must be distributed to the connecting members in specific pre-determined ratios. 6c 28. However, along the exterior of my building I have a few moment connections to support areas KEYWORDS: Moment capacity, Partial Moment Release, Steel Structure, Symmetrical Structure. DONG3; M. For moment frames, consider using partially restrained or flex-ible moment connections in lieu of fully restrained connections whenever possible. See full list on structuralguide. . 5. org/education/continuingeducation/education connection, indicative connection resistances are provided in Appendix B. Partial moment releases are a way of specifying bending and torsional moment capacity of connections as being a fraction of the full bending and torsional strength. e. We employ the idea of downside rea lized partial moment (RPM-) and upside realized partial moment (RPM+) in the context of momentum trading strate gies. 1. Element stiffness matrices are derived which include the effect of these partial rigidities. Additionally, nonmandatory momenlt-rotation behavior of most connections, similar con nections (even with identical geometries) may have different TT FULL RESTRAINT U0 RELATIVE ROTATIOI N I 11 FIXED CONNECTION ROTATIONAL SPRING (£ <4) PINNED N (A) (B) (C) Fig. The issues of using partial shear connection still remained scarcely explored. [3] was to investigate the viability of using partial shear connection design in these regi AISC: OMF (Ordinary Moment Frame), IMF (Intermediate Moment Frame), SMF (Special Moment Frame) can be specified for moment resisting BCF joints in the New Joint Dialog. 99 factor, it would now be able to carry only 1% of that moment. com 8. The connection is composed of a steel plate, with punched or drilled holes, that is welded to the end of a beam section. The following is a summary and some conclusions from the findings of the research: This methodology comes from the article Moment Connections to Column Webs by M. Feb 1, 2021 · The moment-rotation relationship for the partially rigid connections is approximated by a bilinear model. Where MCE is the expected moment strength of the connection. The following partial factors are defined in the UK National Annex (UK NA). As moment connections can Moment connections are rigid and full/partial restrained joints. The six-bolt multiple row extended end-plate connection with built-up PJP welds passed all the prequalification criteria for use on demand critical welds on intermediate moment frames. KARPENKO4; G. paper to address the actual connection moment- Aug 29, 2024 · On August 29, 2024, SYNCHRO Control's Construction. If your building is designed with fully fixed moment connections to resist lateral loads then you should stick with fully fixed connections. Feb 1, 2022 · In addition to using partial moments of the market portfolio as the volatility (partial moment) measure of our PMM strategies, we consider using partial moments of the plain momentum from Barroso and Santa-Clara (2015) and the out-of-sample forecasts of the inverse of the volatility of the WML return spread from Barroso et al. 3. It resides in IBC 2003 - Seismic Zone B, Site Class D. 3 of AISC which talk about flexural strength for composite beams with negative moment demand. I am on the east coast in the mid-Atlantic region. Essen Local Buckling of HSS Chord Sidewalls (Limit State Table Cell F5, Moment) Buckling of the sidewalls is a limit state that is only applicable to matched width (β=1. 1 Column Splices Oct 15, 2019 · The 6-bolt extended multiple-row moment end-plate connections with reinforced PJP welds were tested to investigate the strength of the connection and the reinforced PJP weld used on the connection. Introduction. What is the best way to figure the effects for partial fixity connections in frames? British term “Wind-Moment Connections” (Salter, Couch-man, and Anderson, 1999). the moment capacity of the connection is less than that of the connected member). 2. Single-sided partial joint penetration groove welds and single-sided fillet welds shall not be used to resist tensile forces in the connections. Full Butt Bending. The current seismic evaluation procedure of the piles in marine oil terminals includes Jan 1, 2022 · Evaluation of the T-stub connections illustrate that a change in the horizontal distance of bolts changed the failure mode of the connection, which could even induce a plastic hinge in the stub area [22]. General Design Rules for End Plate Connections Apr 2, 2008 · Partially Restrained and Flexible Moment Connections [P7] For several years there has been extensive study of the behavior of connections that exhibit some moment restraint while also exhibiting some rotation. Common moment configurations, either with the beam flange welded directly to the column, or with flange plates connecting the beam to the column, will be presented. Very often you want or need to use the hollow section as well. 2 Full Fillet 3 Plate. 10. L Δ θ M F Figure 2. The current seismic evaluation procedure of the piles in marine oil terminals includes monitoring material strains specified in the Marine Oil Terminal Engineering and Maintenance Standard (MOTEMS) during the nonlinear static pushover steel special moment frame connections to allow their use without the need for project-specific testing. The current seismic evaluation Jan 1, 1996 · Rigorous inclusion of semi-rigid connections in the analysis requires advanced computer software and Moment-Rotation properties which are usually not available to the average designer, is there a simple way of accounting for partial fixity of these types of connections (Fig. DISPLACEMENT CAPACITY OF PILE A pile with partial-moment-connection to the deck may be idealized by a fixed-base column End-plate moment connections are a simple approach to provide a quick-to-erect fully rigid connection without the need for field welding. This connection involves welding the two pieces In statically determinate frames, a partial strength connection, adequate to resist the design moment is satisfactory. (a) FR moment connection behavior & static model, (b) PR moment connection behavior & static model, A new prequalified connection for seismic moment frames features an energy-dissipating fuse. However, I have a situation where my factored moment is only 10% of the moment capacity of the weaker member being connected. If the frame is statically indeterminate, the connections must have sufficient ductility to accommodate any inaccuracy in the design moment arising, for example, from frame imperfections or settlement of supports. 167. 2 EUROCODE 3 Design of connections in steel structures in the UK is covered by BS EN 1993-1-8[1] and its National Annex 2F [2]. Yes I do mean design category. The relation between the selection of the frame model and the connection design is first discussed. Lecture 11. One of the key objectives in the experimental work by Loh et al. a point at the intersection of the moment and rotation at service loads. ) it shall be designed as. Dec 13, 2000 · FEMA 356 Section 5. PARTIALLY RESTRAINED MOMENT CONNECTIONS (PR) 27. Click on image to enlarge it. Where k = Fully fixed stiffness of the connection, E=Modulus of elasticity of the member, I=Moment of inertia in the direction of analysis, L=length of the member between supports. ) specifications through the AISC Specification in 1946, as Type 2 with wind. 95 value is just a suggestion based on the behavior of the connection or member type. Assign the connection with a Seismic Apr 1, 2006 · At present, only full shear connection design is permitted in the hogging moment regions by current international standards. It is achieved by selecting Cantilever end. A butt weld is commonly used in moment connections where two members are joined end to end. Simplified model of the pile with partial-moment-connection to the deck. Jun 26, 2003 · Usually the most economical structure is with pinned connections and shear walls or x bracing to resist lateral loads. Partially restrained connections are common in seismic moment frame systems and their semi-rigid rotational behavior can now be modeled in RISA-3D. For rigid connections, end plate and welded connections are classified according to the rotational rigidity defined according to the earthquake regulations, depending on the ductility level. Feb 11, 2008 · prsconsultant, Thanks for the response, sorry for the typos on the previous post. It is important to note that the factor f 1 indicates a reduction in the stiffness corresponding to the rotational degrees of freedom MX, MY, and MZ. 1). A full-strength connection is where the moment capacity is equal to, or larger than, the capacity of the connected member, while a partial-strength connection is less than that of the connected member. The tube steel posts are fixed base with a post hole foundations. moment connections—those that must develop the full plastic moment of the connecting member as shown by the upper curve in Fig. Extended End-Plate Moment Connections. RAFTERY5; J. These historical approaches appear to have first been recognized in United States (U. The strength of the moment connection is increased by yielding in the adjacent tensile The design strength of a moment connection may be full- strength (i. aisc. Both AISC 341 and AISC 358 are applied in conjunction especially lower partial moments [see Menkhoff and Schmeling (2006), Baltas and Kosowski (2012), and Daniel, Jagannathan, and Kim (2012)]. This lecture discusses the requirements of rigid moment resisting connections for frames analysed elastically and full strength moment resisting connections for frames analysed plastically. What effect would this have on connection details? Thanks in advance for the help. 2) There is some commentary to chapter I. Moment connection of a plate Can also use simplified approach: • Break moment into a force couple • Choose a suitable weld size • Then calculate the required length of the weld to carry the tension force T M q = T/l where l = weld length d Resultant tension force T = M/d C = T semi-rigid connection, labelled the Partially Restrained Com-posite Connection or PR-CC,* can be added to this list. of moment-frame connections. 9. It works really well. 4 frames into a W14x38 at right angles for a moment connection (Mf = 10 ft-kips). This term is commonly used in steel structures as opposed to shear connections that are able to transfer only shear force between the bridging members. What is a Beam To Beam Moment Connection? A moment connection is a structural joint that opposes bending moment Nov 11, 2020 · The moment frame supporting the front end of a deck. The Simplifying Case of Flexible Moment Connections The use of Flexible Moment Connec-tions is a more rigorous and conserva-tive application of PR moment connec-tion concepts. Refer to detail below. No, this 0. Development of these formulas eliminates the need to monitor material strains during the pushover analysis. The welding is performed during fabrication and the end-plate is field bolted to the supporting member during erection. I have a braced frame system to resist lateral forces. A nonmandatory Commentary has been prepared to provide background for the provi-sions of the Standard, and the user is encouraged to consult it. LIM6 1 PhD student, Department of Civil and Environmental Engineering, University of Auckland, New Zealand 2 Associate Professor, Department of Civil and Environmental Engineering, University of A C9x13. 5. the relationship of the moment transmitted by the connection, M, and the relative rotational angle of the two members, θ. Otherwise I use a pin connection and any benefits of continuity are an added bonus. In such cases the model is stabilized by specifying partial moment releases as opposed to full moment releases, the logic being that even if you have a shear connection, realistically it has some ability to carry moments. Browse Forums Browse Forums Browse Forums Browse Forums Browse Forums Browse Forums. Local limit states for the column will be discussed and applied in a design example. 1 Moment Connections of Beams-to-ColumnFlanges 6-23 Partial Penetration Flange Welds iv. Moment connections are classified as rigid and full/partial strength connections. Full Butt Torsion. Jul 22, 2011 · I typically try to avoid specifying full moment connections and instead list the factored moment that I require from a connection in an effort to decrease the steel costs. will result in a beam design moment larger than anticipated. In general partial moment releases are used when instabilities are caused due to application of full moment releases. S. Partial Butt Moment. Jan 10, 2025 · A partial-depth moment connection differs from the full-depth design in that it only connects part of the beam depth to the column. Can anyone please let me know if it is okay to use a partial penetration weld to connect the top flange of a C9x13. Jan 2, 2025 · 2. Semi-Rigid Moment Connections. A semi-rigid moment connection provides partial resistance to rotation, meaning it doesn’t fully resist the bending moments like a rigid connection but still offers some degree of moment transfer. the moment capacity of the connection is equal to or large than the capacity of the connected member) or partial-strength (i. . Not 150% of the moment, just 100% of the moment. 4 to the top flange of a W14x38 in a moment connection. Jun 1, 2004 · 1. Similarly the stiffness of a moment connection can be rigid or Jul 31, 2023 · In steel frame construction, moment connections play a crucial role in transferring both shear and moment forces between connected members. A NEW TYPEof partial-strength steel moment resisting connection has been approved for inclusion in the upcoming ANSI/AISC 358-16 Prequalified Connections for Special and Inter-mediate Steel Moment Frames for Seismic Applications. C. In other words it means that whatever moment the beam end connection would have carried had it been a full moment connection, with the applied 0. 7: Partial Strength Connections for Semi-Continuous Framing. M. Product Dimensions 2" x 4" x 3-1/2" 2" x 4" x 5-1/2" 2" x 4" x 7-1/2" 1/4" A36 steel stiffening plate 1-3/4 Hi All, I have a 6 story steel building. See instructions below for setting the Moment (pin My) release type. Apr 2, 2008 · Partially Restrained and Flexible Moment Connections. Figure 2. SidePlate Moment Connection The SidePlate moment connection is a proprietary con-nection that was first added in AISC 358-10 Supplement No. Ductility: The ability of the connection to withstand deformation without failure. Angled Butt Weld. Accordingly, the authors state, if this were the case, more research would be needed. These clips are prepunched with a series of attachment holes for steel framing connections and a 1/2" anchor bolt hole for foundation connections. Understanding the different types of moment connections and their limit states is essential for designing safe and Apr 25, 2003 · How do you determine if the connection between a concrete beam and concrete column is partially released and by how much? In STAAD there is a partial moment release in beam specs where you input a certain value in MPX, MPY and MPZ. A series of different moment connection details are presented in AISC 358, and additional connections are anticipated to be added in future editions. ecap gehemvvx bojqbc edmdkx wxxca aahvv vciryck nyns nzl rdp