摘要
开展了6个1/2比例的型钢混凝土(SRC)框架柱试件的低周反复加载试验。重点考虑轴压力系数和配箍特征值对型钢混凝土柱变形性能和滞回特征的影响。在试验研究基础上,分析了滞回曲线特征,并确定了恢复力模型的滞回规则。通过对试验结果的回归分析确定了卸载刚度和反复加载下的强度退化率,主要考虑参数包括位移延性比和轴压力系数。恢复力模型的骨架曲线由弹性段、强化段和强度退化段组成三线形骨架曲线。骨架曲线采用基于截面条带法和按实验数据的统计回归分析方法确定,其强化段和强度退化段均考虑了轴压力系数的影响。从而建立了能够考虑轴压力系数对滞回特性影响的型钢混凝土柱剪力-侧移恢复力模型。
Cyclic loading tests were conducted on 6 half scale SRC （steel reinforced concrete, SRC） columns. The effect of axial compression ratio and stirrup configuration on the seismic performance and hysteretic characteristics of SRC columns is especially investigated. Based on the test results, the effect of the change of axial compressive ratio on the hysteretic characteristics of SRC frame columns are investigated. Based on the experimental observations and the research results from other authors, a series of hysteretic rules for SRC columns is proposed. The skeleton curves are set up on the basis of a fiber section analyses and a statistic regression analysis. Finally, a restoring force model for shear force-top displacement relationship of SRC columns is presented, which is capable of considering the effect of axial compressive ratio on the hysteretic characteristics of columns. Comparisons between experimental and analytical shear force-top displacement relationships indicate that they are in good agreement with each other.
出处
《地震工程与工程振动》
CSCD
北大核心
2009年第5期79-85,共7页
Earthquake Engineering and Engineering Dynamics
基金
教育部新世纪优秀人才支持计划项目(NCET-06-0571)
国家自然科学基金项目(50478120)
福建省自然科学基金项目(E0810021)
关键词
型钢混凝土
框架柱
轴压力系数
恢复力模型
steel reinforced concrete
frame column
axial compression ratio
restoring force model
