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The mechanical model analysis of the rigid joint of the key beam column connection of the portal frame of the industrial building is given in this paper.The structure form of joint has great influence on the stress state of high strength bolt connection.The calculation model of bolt is matched according to the actual structure. The mechanical analysis of the components joint using the finite element software SAP2000 is given by choosening the model of rigid stiffener extended end plate connection.The results show that the tension value of the two row of bolts on the side of the rigid joint model is close to each other.The tension of the first row of bolts on the side of the tension flange is always in the extreme value, which could be considered for the design envelope value.There is no obvious change in the tension force of the flange side of the compression flange if ignoring the impaction of the pull bending force,which satisfies the plane section assumption.The numerical simulation results verify the applicability of the proposed model for the design of high strength bolt rigid joints.

Study of rigid Bolt Joint in Beam-column connection of Gabled Portal Frames