高轴压比高强混凝土柱抗震性能试验研究  

Test study on seismic performance of high axial compression ratio and high-strength concrete columns

作　　者：李远瑛[1] 张德生[1] 

机构地区：[1]嘉应学院土木工程学院,广东梅州514015

出　　处：《地震工程与工程振动》2014年第1期172-179,共8页Earthquake Engineering and Engineering Dynamics

基　　金：2012年广东自然科学基金项目(S2012010010820);嘉应学院自然科学基金项目

摘　　要：本文以4根高轴压比、高强混凝土柱为研究对象进行低周反复水平荷载试验,对各试件的破坏形态、滞回性能、延性、耗能性能、强度及刚度退化等试验结果进行研究,分析高轴压比、配箍率的变化对柱抗震性能的影响。结果表明,高强混凝土柱在反复水平荷载作用下发生弯曲破坏,箍筋间距较小试件的滞回曲线饱满,滞回环面积大,耗能大,延性好。各试件在加载初期刚度退化较快,后期较慢。试件C-1设计轴压比达到1.185时仍有较好的延性与抗震性能。该研究结果对发展应用高强混凝土具有实际意义。In this paper, 4 specimens of high axial compression ratio and high strength concrete columns under low reversed cyclic horizontal loading are studied. Failure mode, hysteretic performance, ductility, dissipation capaci- ty, degradation of strength and rigidity are researched. The effects of the change of the axial compression ratio and volumetric percentage of stirrups on the seismic performance of the columns are studied. Test results show that the failure mode of high strength concrete column under low reversed cyclic horizontal loading is bending failure. For specimens with smaller stirrup spacing the hysteretic curves is relatively full, the hysteretic loop area is larger, the energy dissipation is more and the ductility is better. Despite the faster early stiffness degradation, the columns show lower degradation of rigidity in later loading stages. When the axial compression ratio of design is 1. 185, the speci- men C- 1 still has better ductility and seismic performance. The results of studies on development and application of high strength concrete are of practical significance.

关 键 词：高轴压比 高强混凝土柱 反复水平荷载 抗震性能 

分 类 号：TU37[建筑科学—结构工程] P315.92[天文地球—地震学]