Abstract

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Title:: Parameter Analysis on Concrete-filled Square Steel Tubular Column-steel Beam Semi-rigid Connection

Author(s):: XU Man; LIANG Si-yu; ZHANG Li-bin; CHEN Yu; HAN Zhen-ning; School of Civil Engineering, Northeast Forestry University

Keywords:: concrete-filled square steel tubular column; semi-rigid connection; numerical simulation analysis; mechanical property

Abstract:: In order to study the mechanical properties and influencing factors of semi-rigid connections between concrete-filled square steel tubular column and steel beam, the concrete-filled square steel tubular column-steel beam semi-rigid connection was taken as research object. The influence laws of the parameters such as the angle steel thickness, short and long limb length ratio of angle steel, bolt diameter on the mechanical behavior of the joint were investigated by numerical simulation. The formula for the initial rotational stiffness of the connection was given. The results show that the change of the thickness of angle steel has little influence on the initial stiffness of the connection, but it has great influence on the plastic stiffness and the bearing capacity of the connection. The short and long limb length ratio of angle steel has obvious influence on the stiffness and bearing capacity of the connection within a certain range, and it only has great influence on the bearing capacity of the connection beyond the scope. The change of bolt diameter has some influence on the bearing capacity and stiffness of the connection, but the influence degree is small, and it is not the main parameter.