非等壁厚矩形钢管混凝土构件抗弯性能研究  

RESEARCH ON BENDING PERFORMANCE OF NON-UNI-THICKNESS WALLED RECTANGULAR CONCRETE-FILLED STEEL TUBES SUBJECTED TO PURE BENDING

作　　者：郁晨江 张扬 傅光远[3] 李四平 YU Chenjiang;ZHANG Yang;FU Guangyuan;LI Siping(Department of Engineering Mechanics, Shanghai Jiao Tong University, Shanghai 200240, China;Department of Civil Engineering, Nanyang Institute of Technology, Nanyang 473004, China;Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

机构地区：[1]上海交通大学工程力学系,上海200240 [2]南阳理工学院土木工程系,河南南阳473004 [3]上海交通大学土木工程系,上海200240

出　　处：《钢结构》2017年第11期47-52,共6页Steel Construction

基　　金：国家自然科学基金项目(51278298)

摘　　要：探讨非等壁厚矩形钢管混凝土构件的抗弯性能,进行了5根梁的试验研究,主要考虑不同的拉压区钢管壁厚对构件抗弯性能的影响。试验结果表明,非等壁厚矩形钢管混凝土受弯构件具有良好的抗弯承载力和延性,直至试验结束,荷载未出现下降阶段。同时,采用纤维模型数值方法得到了非等壁厚矩形钢管混凝土的受力全过程曲线,计算结果与试验结果相吻合。与等壁厚矩形钢管混凝土相比,相同用钢量下,非等壁厚矩形钢管混凝土构件具有更大的抗弯承载力,并且通过提升混凝土强度与上下壁钢管的屈服强度,能够更加有效地提升构件的抗弯承载力。5 non-uni-thickness walled rectangular concrete-filled steel tube （CFST） beams were tested to investigate the bending behavior of members. The effect of steel wall thickness in the tension and compression zone on the bending capacity was discussed in the paper. The experimental results indicated that non-uni-tbickness walled rectangular CFSTs had great bending capacity and ductility. The load did not decrease until the end of tests. Then the fiber model method was applied to obtain the moment-curvature and moment-strain complete curves, which met well with the experimental results. Compared with the equal walled rectangular CFSTs with the same steel quantity, non-uni-thickness walled rectangular CFSTs had better bending capacity, which could be more effectively improved by improving concrete strength and yield strength of upper and bottom steel plates.

关 键 词：非等壁矩形钢管混凝土 抗弯承载力 试验研究 纤维模型法 

分 类 号：TU398.9[建筑科学—结构工程]