Research on Seismic Behavior of Semi-rigid Steel Frame Structures With Eccentric Brace

Eccentric brace was used in the semi-rigid steel frame to improve the lateral rigidity as the steel frame has poor lateral displacement resisting ability and large deformation under the seismic action in spite of its better energy dissipation and seismic performance [1][2][3][4][5][6][7][8][9][10].The elastic analysis under frequent earthquake and elastic-plastic analysis under rare occurrence earthquake of semi-rigid steel frames with no support, single-inclined eccentric support and herringbone eccentric support are all covered in this paper.The tpo displacement of each specimen and maximal floor shear changing law are analyzed.The change of the joint stiffness, the setting and type of the eccentrical brace and the influence on the dynamic performance of the semi-rigid steel frame are summarized.Research results in this paper are useful for the design of relevant structures on earthquake resistance and disaster mitigation.