矩形钢管高强混凝土双向压弯构件力学性能分析  

Behavior of high-strength concrete-filled RHS steel tubular members subjected to axial compression combined with bi-axial bending

作　　者：田华[1] 张素梅[1] 郭兰慧[1] 

机构地区：[1]哈尔滨工业大学土木工程学院

出　　处：《哈尔滨工业大学学报》2007年第12期1854-1858,共5页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金资助项目(59808004);黑龙江省杰出青年基金资助项目

摘　　要：为分析两种典型加载路径下双向压弯构件的荷载-变形关系全过程曲线,编制了非线性数值计算程序,考虑残余应力对构件承载力相关曲线的影响,分析构件长细比、钢材屈服强度、混凝土强度、含钢率、加载路径及加载角度等参数对构件承载力的影响,给出矩形钢管高强混凝土双向压弯构件的三维承载力相关关系及其简化计算公式.通过2根双向压弯构件试验,将简化计算公式与数值计算结果和试验结果进行对比,三者吻合较好.结果表明:简化计算结果经济安全.A nonlinear numerical program was developed to carry out calculation and analysis on the load - deformation reaction curves. The analysis was conducted about the effect of the residual stress existing in the cross - section on the load - deformation reaction curves and on the related curves of the bearing capacity. Meanwhile, detailed discussions were hold about the effects of the slenderness ratio, steel yield strength, concrete strength, steel ratio, loading - paths and loading - angles on the bearing capacity of the members. Finally, this paper illustrated the there -dimensional related surfaces for the bearing capacity of the members and presented the simplified formula. To validate whether the theory of this paper was accurate or not, two CFST columns were experimented under the bi - eccentric load. Moreover, it was concluded from comparison that there was a good agreement among the result from the simplified formula and that from the nonlinear numerical program and the experiment. Furthermore, the simplified formula in this paper not only had an explicit physical meaning and could provide an economical and safe result, but also could offer a better reference for the project design of the bearing capacity of the members.

关 键 词：矩形钢管高强混凝土 双向压弯 长细比 

分 类 号：TU375[建筑科学—结构工程]