FINITE ELEMENT ANALYSIS OF STEEL FRAME BEAM-COLUMN JOINTS UNDER LOW-CYCLIC LOADING BASED ON OPENSEES

摘要

In order to study the elastic-plastic hysteretic properties of the steel frame beam-column joints under low-cyclic loading，OpenSees ,an object-oriented framework for finite element analysis, is used to investigate the seismic performance of the steel frame beam-column joints. A nonlinearBeamColumn element object in OpenSees which is based on the non-iterative (or iterative) force formulation, and considers the spread of plasticity along the element, is used to simulate the steel beam and the column. The Joint 2D in OpenSees is used to simulate the seismic performance of the connection of steel column and two H-shaped beams . The comparison between the computed results and the experimental results shows that finite element analysis can simulate the elastic-plastic hysteretic properties of the steel frame beam-column joints under low-cyclic loading well , it provides a reliable simulation method and reference for the seismic design of steel structure joints.