高强箍筋约束混凝土轴压力学性能尺寸效应试验研究  

Experiment study on the size effect of axial compressive mechanical performance of concrete confined by high-strength stirrups

作　　者：李振宝[1] 杨修广[1] 宋佳[1] 杜修力[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《混凝土》2013年第8期1-4,共4页Concrete

基　　金：国家自然科学基金重点项目(50838001)

摘　　要：为了研究约束混凝土轴压力学性能的尺寸效应,进行了7个高强箍筋约束普通混凝土试件的轴心受压试验。试验变量主要包括试件尺寸和箍筋形式。试验结果表明:①试件尺寸增大对约束混凝土强度有负面影响;②复合箍筋可明显提高试件延性;且其约束优势主要体现在试件承载力下降段;③随着试件尺寸增大、箍筋形式复杂,高强箍筋屈服时试件全截面应力与峰值应力的比值越大。In order to study the effect size of mechanical properties of confined concrete under axial compressive loading,axial compression experiments of seven concrete columns confined by high-strength stirrups of three groups were carried out.The main test variables were specimen size,stirrups configuration.The test result showed that： ① the enlargement of specimens decreased reinforced concrete strength;②composite stirrups could improve the ductility of columns and the constraint advantages were mainly embodied at the bearing capacity descending stage;③as the specimen size increased,the stirrup configurations became complex,the ratio of the whole section stress when the high-strength stirrups yield to the peak stress increased.

关 键 词：高强钢筋 箍筋形式 约束混凝土 尺寸效应 

分 类 号：TU528.01[建筑科学—建筑技术科学]