型钢再生混凝土柱水平承载力及轴压比限值的试验研究  

EXPERIMENTAL STUDY ON LATERAL BEARING CAPACITY AND AXIAL COMPRESSION RATIO LIMIT VALUES OF STEEL REINFORCED RECYCLED AGGREGATE CONCRETE COLUMNS

作　　者：薛建阳[1] 王运成[1] 马辉[1] 刘锦禄[1] 敖翔[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《工业建筑》2013年第9期30-34,45,共6页Industrial Construction

基　　金：国家自然科学基金项目(51178384);住房和城乡建设部科学技术项目(2012-K2-12);陕西省留学人员科技活动择优项目(陕外专发[2010]26号);陕西省教育厅科研计划项目(12JK0902)

摘　　要：通过7个型钢再生混凝土柱在低周反复荷载作用下的试验,对型钢再生混凝土柱水平承载力及轴压比限值进行研究。分析轴压比、体积配箍率和再生骨料取代率等3个因素对型钢再生混凝土柱水平承载力的影响。研究表明:柱的水平承载力随轴压比的增加而增加,但其延性系数逐渐降低;随着配箍率的增加,柱表现出较好的承载力;再生骨料取代率对柱承载力影响不大,总体与型钢普通混凝土柱一样具有较好的承载力和延性。从型钢混凝土柱正截面界限破坏时力的平衡条件出发,对型钢再生混凝土柱轴压比限值进行理论推导;结合试验数据及试件延性分析,提出型钢再生混凝土柱在不同抗震等级下的轴压比限值,以供工程设计参考。Abstract： Based on the test of seven steel reinforced recycled aggregate concrete （SRRC） columns under low-cyclic reversed loading, the lateral bearing capacity and axial compression ratio limit of the steel reinforced recycled aggregate concrete columns were studied. The influences of the axial compression ratio, stirrup ratio and recycled coarse aggregate replacement rate on the bearing capacity of steel reinforced recycled aggregate concrete column were analyzed in this paper. It is shown that the lateral bearing capacity increases and the ductility coefficient＂ reduces as the increase of the axial compression ratio of the column. The column exhibits good bearing capacity as the increase of the stirrup ratio. There is no obvious influence of coarse aggregate replacement rate on the load carrying capacity of the column, which shows the same good bearing capacity and ductility as those of ordinary steel reinforced concrete column. The axial compression ratio limit of steel reinforced recycled aggregate concrete column was deduced based on the force balanced condition at balanced failure. Finally, the axial compression ratio limit values of the SRRC column under different seismic levels were put forward for engineering design reference in terms of the test data and ductility analysis of the specimen.

关 键 词：型钢再生混凝土 柱 承载力 延性 轴压比限值 

分 类 号：TU398.9[建筑科学—结构工程]