方钢管混凝土柱抗剪性能试验研究  

Experimental study on shear resistance performance of concrete filled square steel tubular columns

作　　者：蔡健[1,2] 梁伟盛[1] 林辉[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510641

出　　处：《深圳大学学报（理工版）》2012年第3期189-194,共6页Journal of Shenzhen University(Science and Engineering)

基　　金：国家自然科学基金资助项目(50878087)~~

摘　　要：研究方钢管混凝土柱在弯剪和压弯剪受力状态下的力学性能,进行了6个足尺方钢管混凝土柱的抗剪承载力试验,以剪跨比和轴压比作为主要参数,讨论试件的破坏形态、剪力-位移曲线等试验结果,分析剪跨比和轴压比等因素对构件抗剪承载力的影响,并对构件的抗剪性能进行非线性有限元分析.根据有限元计算结果,拟合推导出考虑轴压力影响的方钢管混凝土柱弯剪试件抗剪承载力与剪跨比关系的经验公式,公式计算结果与试验结果吻合较好,稍偏于安全,可供工程实践参考.In order to study the mechanical performance of concrete filled square steel tubular columns under the action of bending and shear force, and the action of compression, bending and shear force, the experiments of 6 full scale concrete filled square steel tubular columns were carried out, in which the shear span ratio and the axial compression ratio are taken as the main parameters. The damage feature and load-displacement curves of the specimens were discussed. The influences of the shear span ratio and the axial compression ratio on the shear resistance of the specimens were analyzed. The shear performance of the columns were analyzed by nonlinear finite element method. According to the analytical calculating results, a formula of the shear bearing capacity of concrete filled square steel tubular column relating to shear span ratio was inferred, which considered the benefits of axial compression to the shear bearing capacity. The calculating results agree well with the experimental results, the formula can be used to the engineering computation.

关 键 词：结构工程 方钢管混凝土 柱 力学性能 有限元法 抗剪承载力 

分 类 号：TU352.1[建筑科学—结构工程]