内置钢构架钢骨混凝土转换深受弯构件试验研究  

Experimental study on steel truss reinforced concrete transfer deep flexural members

作　　者：杨春[1] 蔡健[1] 吴轶[2] 陈星[3] 

机构地区：[1]华南理工大学土木工程系,广东广州510640 [2]广州大学土木工程学院,广东广州510006 [3]广东省建筑设计研究院,广东广州510000

出　　处：《建筑结构学报》2008年第2期92-98,共7页Journal of Building Structures

基　　金：广东省自然科学基金资助项目(020965);广州市教育局科技计划资助项目(62063)

摘　　要：以实际工程为背景,对两榀1/6缩尺内置钢构架钢骨混凝土转换深受弯构件模型进行试验研究,分析这种新型转换构件在竖向集中荷载作用下的力学性能和破坏形态,研究构件在受力过程中裂缝的开展规律、钢筋和钢构架的应变变化特点、传力模式。研究结果表明内置钢构架钢骨混凝土转换深受弯构件具有承载力高、刚度大、变形能力强等诸多优点,内置钢构架钢骨混凝土转换深受弯构件的破坏形态有显著的改善,避免了普通钢筋混凝土转换梁(尤其是深受弯构件)的脆性破坏形态,表现出良好的塑性。内置钢构架钢骨混凝土转换深受弯构件充分利用了深受弯构件的拉力拱传力机理,设置钢构架实现了以最短、最直接的传力路线和方式传递上部荷载。Based on an actual project, experiments of two 1/6 scale steel truss reinforced concrete transfer deep flexural members were carried out to study the force transfer mechanism and characteristics of failure mode of the newly developed transfer member, steel truss reinforced concrete transfer deep beam, under vertical concentrated loads. The laws of crack development, features of strains of reinforcing bars and steel truss, and the mechanism of force transfer of the deep flexural members were analyzed. Results show that the steel truss reinforced concrete transfer deep flexural members have high load carrying capacity, large rigidity and good deformability. The failure mode of steel truss reinforced concrete transfer deep beam is improved significantly, which has good plasticity, and brittle failure mode of normal reinforced concrete transfer beam, especially deep flexural members, is avoided. The tied arch force transfer mechanism of deep flexural members is fully used by steel truss reinforced concrete transfer deep beam, and by arranging the steel trusses, the shortest and most direct force path is achieved to transfer upper loads.

关 键 词：内置钢构架 钢骨混凝土 转换深受弯构件 试验研究 力学性能 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1