摘要
为了研究钢板-砖砌体组合框架的抗震性能,制作了2榀缩尺比例为1∶2的单层单跨组合框架,考虑竖向压应力水平分别为0.1和0.2,进行低周往复荷载试验。根据试验结果,分析其破坏特征,研究其滞回曲线、骨架曲线、承载力、承载力退化、刚度退化、延性和耗能能力等受力性能。结果表明:钢板-砖砌体组合框架的破坏特征主要表现为梁端与柱脚处钢板的局部屈曲、焊缝撕裂与砖砌体压碎;竖向压应力水平在0.2以下时,其对钢板-砖砌体组合框架的刚度退化、承载力尚未构成显著影响,但已经对承载力退化、延性与耗能能力产生较明显的影响;钢板-砖砌体组合框架屈服后延性好,滞回曲线饱满,具有较好的抗震耗能能力。
In order to study the seismic performance of steel plate-masonry composite frames, a total of two 1 ： 2 small- scaled composite frames with one-story and one-span were fabricated, considering the influence of vertical compression ratios equal to 0.1 and 0.2, respectively, and tested under low-cycle reversed loading. The failure characteristics of steel plate-masonry composite frames were analyzed. The hysteretic curve, skeleton curve, load-carrying capacity, strength degradation, stiffness degradation, ductility and energy dissipation capacity of steel plate-masonry composite frames were also presented. Test results show that the failure of steel plate-masonry composite frame mainly includes local buckling and/or weld fracture of steel plate and crushing of encased masonry at beam ends and column base. For vertical compression ratios below 0.2, it has not obvious influence on stiffness degradation and load-carrying capacity of steel plate-masonry composite moment-resisting frame, but has influence on strength degradation, ductility capacity and energy dissipation. Moreover, steel plate-masonry composite moment-resisting frame possesses good ductility after it is yielded, and the hysteretic curve is full, which indicates this type of composite frame has better earthquake- resistant and energy dissipation capacity.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2012年第11期91-98,共8页
Journal of Building Structures
基金
国家自然科学基金项目(51008070)
城市与建筑遗产保护教育部重点实验室开放课题(KLUAHC 0911)
关键词
钢板-砖砌体组合框架
拟静力试验
抗震性能
承载力退化
刚度退化
延性
steel plate-masonry composite frame
quasi-static test
seismic performance
strength degradation
stiffness degradation
ductility
