RESEARCH ON LOADING BEHAVIOR OF CONCRETE-FILLED SQUARE TUBULAR COLUMN AND STEEL-CONCRETE COMPOSITE BEAM WITH REDUCED BEAM SECTION JOINTS
The nonlinear FEM models of concrete-filled square tubular column with internal diaphragms to composite steel-concrete beams with reduced beam section joints involving geometric large deformation and materials nonlinear is presented. The 3D models of beam-tocolumn joints with internal diaphragms by 3D solid elements are founded. The results of FEM are fit close to that of tests. And the bearing capacity behavior of joints under the monotonic loading and cyclic loading are analyzed respectively, including P-A curves, the stresses distribution of beam, the dissipating energy ability and destruction form. The analysis results show that with the considering of RC floor slab, the bearing capacity and stiffness of the joints increased properly, and the influence of the stresses distribution of joints is poor. The bearing capacity and stiffness of composite beam with reduced beam section joints are lower a little than that of non-reduced beam sections joint. The yielding load, ultimate load and initial stiffness of joint with no reduced beam section of composite beam are bigger than that of joint with reduced beam section of composite beam about 20.3％～24％, 13.2％～18.1％, and 6.9％～7.4％, respectively. The joints that studied in this paper present excellent ductility and dissipating energy ability.
concrete-filled square tubular column beam-column joint reduced beam section steel-concrete composite beams finite-element analysis
Tian-Hua zhou Shao-Feng Nie Wu Ye Hui-Ying liu
School of Civil Engineering, Changan University, Xian 710061, P.R. China Hangzhou Boiler Group Co., Ltd, Hangzhou 310004, P.R. China
国际会议
广州
英文
687-694
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）