Abstract

Info

Title:: Design Method of Cover-plate Reinforced Connection of I-section Column for Weak Axis with Box Joint Region

Author(s):: GOU Hai-gang; ZHENG Hui-xiao; LU Lin-feng; School of Civil Engineering, Chang’an University

Keywords:: steel frame; weak axis; cover-plate connection; design method; mechanical behavior

Abstract:: In order to realize the seismic design idea of “high ductility and high bearing capacity” and to promote the application of cover-plate reinforced connection in I-section column steel frame, the design method and step about the cover-plate reinforced connection with box joint region of I-section column for weak axis were proposed. The reliability of the design method about cover-plate reinforced connection was verified by a practical multi-storey steel frame engineering example. The mechanical behavior of internal frame cross-shaped joint under cyclic loading in the actual engineering was analyzed by using finite element software ABAQUS. The failure pattern, hysteresis curve, skeleton curve, stiffness degradation curve, ductility factor, and energy dissipation performance were analyzed. The results show that the design method of the new cover-plate reinforced connection with box joint region of I-section column for weak axis was reasonable and reliable. The joint of I-shaped column for weak axis designed by the method can effectively move the beam plastic hinge away. The joint with the new connection has strong plastic deformation capacity and energy dissipation capacity, and can achieve the seismic design concept of “strong column and weak beam” and “strong joint and weak component” in the seismic code.