Evaluation of End-Plate Moment Connection Subjected to Combined Loading

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TAHERIPOUR M.; GHASSEMIEH M.

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Journal: Modares Civil Engineering journal Year:2018 | Volume:18 | Issue:6 Page(s): 169-180

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Information Journal Paper

Title

Evaluation of End-Plate Moment Connection Subjected to Combined Loading

Author(s)

TAHERIPOUR M. | GHASSEMIEH M. | Issue Writer Certificate

Keywords

Moment ConnectionQ2

End-PlateQ2

Combined LoadingQ1

Force InteractionsQ2

TorsionQ1

Lateral Torsional BucklingQ1

Abstract

The study investigated the effect of Combined Loading on End-Plate Moment Connection considering the interaction of bending moments, axial forces and twisting moments. In some cases, beam-to-column joints can be subjected to the simultaneous action of bending moments, axial forces and twisting moments. Current specifications for steel joints do not take into account the presence of axial forces (tension and / or compression) or twisting moments in the joints. Although the axial force or twisting moments that transferred from the beam is usually low, it may, in some situations attain values which can lead to a considerable effect on the connections behaviour and significantly reduce the joint flexural capacity. Unfortunately, few studies considering the bending moment versus axial Force Interactions have been reported and there aren’ t any reports considering bending moments versus twisting moments interactions or combination of all the mentioned cases of loads. The lack of knowledge for understanding the performance of End-Plate Moment Connection under combined loads may lead to unreasonable or even unsafe design, so in this study a combination of different loads have been examined. Therefore two extended End-Plate connections with different behaviour modeled using finite element method of analysis. The interactions between connection components (bolts, members and endplate) were accurately modelled to simulate the actual behaviour of connections. Both material and geometric nonlinearities were considered. At first the behavior of these models are investigated in pure bending application and numerical results validated against experimental data. The suggested finite element models showed good agreement with experimental results. The level of axial forces in joints of structures can be significant and has a significant influence on characteristics of joints. Because of the existence of this force in the moment resisting frames, the combination of bending and axial force in beams should be considered. Structures under fire situations where the effects of beam thermal expansion and membrane action can induce significant axial forces in the connection is a common condition. The results show that even in small amount of axial force the mode of failure and moment capacity of connection can change. Axial tensile forces decrease the initial stiffness of connection and axial compressive forces increase the stiffness. In many applications beams are eccentrically loaded and as a result experience twisting loads in combination with bending. The interaction effects due to Torsion acting in combination with bending can reduce the capacity of the beam and initial stiffness of connection. Finally axial forces were added to the previous models so they experienced a combination of axial force, bending and twisting moment. The results indicated that the level and direction of axial force significantly modified the connection response. It was observed that compression forces significantly decrease the bending capacity of the models and lateral-Torsional buckling of beam occures in all models. Tension forces can reduce the effect of Torsion and in many cases they caused the bolts ruptured. Moreover, interaction diagram for predicting the bending capacity considering interaction of bending, Torsion and axial forces are proposed based on the results from finite element analysis.

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APA: Copy

TAHERIPOUR, M., & GHASSEMIEH, M.. (2018). Evaluation of End-Plate Moment Connection Subjected to Combined Loading. MODARES CIVIL ENGINEERING JOURNAL, 18(6 ), 169-180. SID. https://sid.ir/paper/256717/en

Vancouver: Copy

TAHERIPOUR M., GHASSEMIEH M.. Evaluation of End-Plate Moment Connection Subjected to Combined Loading. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2018;18(6 ):169-180. Available from: https://sid.ir/paper/256717/en

IEEE: Copy

M. TAHERIPOUR, and M. GHASSEMIEH, “Evaluation of End-Plate Moment Connection Subjected to Combined Loading,” MODARES CIVIL ENGINEERING JOURNAL, vol. 18, no. 6 , pp. 169–180, 2018, [Online]. Available: https://sid.ir/paper/256717/en

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