高强再生混凝土柱大偏压性能试验研究  

Experimental study on mechanical behavior of high strength concrete columns made of recycled aggregate under large eccentric loading

作　　者：张建伟[1] 申宏权 曹万林[1] 董宏英[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《自然灾害学报》2015年第2期60-67,共8页Journal of Natural Disasters

基　　金：北京市自然科学基金项目(8132016);国家科技支撑计划课题(2011BAJ08B02)

摘　　要：为了解再生粗骨料高强混凝土柱的压弯力学性能,进行了4根大尺寸钢筋混凝土柱大偏心受压重复荷载试验,包括方形与圆形两种截面柱,方形截面边长为600 mm×600 mm,圆形截面直径为675mm。研究变化参数为再生粗骨料取代率。在试验基础上,分析了其破坏特征、承载力、刚度及截面应变发展规律。结果表明,不同截面形式的再生粗骨料高强混凝土柱,其大偏压破坏过程、破坏形态、刚度退化、截面应变发展规律与普通混凝土柱的没有明显区别。参照现行混凝土结构设计规范的相关设计公式计算其极限承载力,计算结果与试验结果符合良好,计算精度能够满足工程要求。To investigate the axial-flexural behavior of high strength concrete columns made of recycled coarse aggregate,this paper presents a repeated large eccentric loading test on four large size reinforced concrete columns. Two kinds of cross-section columns were included,one is square cross section with the size of 600 mm × 600 mm,the other is circular cross section with the diameter of 675 mm. The variable parameter is the replacement ratio of recycled coarse aggregate. Based on the test,the failure characteristics,load-bearing capacity,stiffness and the regularities of development for section strain were analyzed. Results show that the difference about failure process,failure modes,degradation of stiffness and the regularities of development for section strain between recycled concrete columns and normal concrete columns are not obvious. The ultimate load-bearing capacity of recycled coarse aggregate columns were calculated by the related calculating formula in the code for design of normal concrete structures.The calculated results agree well with the measured results. It is indicated that the calculated accuracy can meet the engineering requirements.

关 键 词：高强再生混凝土 柱 粗骨料取代率 压弯性能 重复荷载试验 

分 类 号：TU375.3[建筑科学—结构工程]