Advanced inelastic analysis of thin-walled core-braced frames

摘要

This paper presents the advanced inelastic analysis theory for nonlinear analysis of thin-walled core-braced frames. It focuses on a second-order plastic hinge method for studying the nonlinear behaviour of space steel frames comprising of internal core walls. The steel frameworks surrounding the building core walls are modelled by using the inelastic frame element. The core walls are modelled as thin-walled frame elements. An Updated Lagrangian approach is used to describe the motion of elements. Nonlinear solution methods and numerical strategies for computer implementation are presented. Numerical examples are provided to verify the proposed nonlinear analysis theory and the computer package. Finally, a 24-storey thin-walled core-braced frame is analysed using the advanced inelastic analysis program, and the inelastic behaviours of the core-braced frame are studied.