Abstract

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Title:: Research on Simplified Model of Ductile and Energy-dissipated Connections in Steel Frames

Author(s):: HAN Ming-lan; WANG Hui; WANG Yan; WANG Shuai; MU Zheng; School of Science, Qingdao Technological University

Keywords:: ductile and energy-dissipated connection; simplified model; spring element; hysteresis curve; test study

Abstract:: In order to simplify finite element numerical calculation of ductile and energydissipated connections and afford basic research for simplified calculation of ductile and energydissipated connections in steel frame structures, according to heattreated beam section connection, coverplate reinforced connection and flangeplate reinforced connection, theoretical and numerical studies on three kinds of simplified theory models of ductile and energydissipated connections were conducted. On basis of test study of connections, simplified theory models were designed by introducing spring element, and constitutive relations of the springs were defined according to generalized force and generalized displacement relationship of spring elements, which fully reflected deformation of the panel zone and connection components. Numerical calculation of connection simplified theory models was carried out by using ANSYS software, momentrotation hysteresis curves were obtained and compared to test results. The results show that hysteresis curves are consistent with test results, and simplified theory model can reflect real mechanical property of ductile and energydissipated connection and development of plastic zone. The results will provide new method for numerical analysis of steel frame structure with ductile and energydissipated connections.