摘要
为了研究可替换连梁连接的内填混凝土双钢板混凝土联肢组合剪力墙结构的抗震性能,进行了2层半单跨1∶3缩尺试件的低周反复加载试验。试验中对连梁进行了2次替换,分析了试件在循环荷载作用下的破坏机理、滞回性能、延性、刚度退化以及耗能能力。试验结果表明:水平荷载作用下,双钢板混凝土联肢组合剪力墙的可替换连梁首先进入塑性耗能,连梁替换后结构的抗震性能基本恢复到连梁替换前的性能水平;连梁端板没有出现变形,连梁拆卸和安装方便;设计中钢柱柱脚截面可适当加大,需合理设计柱脚部位的焊缝和连接构造,避免应力集中;可替换连梁连接的组合剪力墙结构的滞回曲线比较饱满,抗震性能较好;连梁替换前后结构的骨架曲线相差很小,其抗侧刚度基本一致;结构进入塑性后,试件的承载能力降低很小;在同水平荷载作用下,连梁的剪应力最大,边柱柱脚的正应力较大,中柱、钢梁及剪力墙钢板的应力较小。
In order to research the seismic performance of double steel plate-concrete coupled composite shear walls with replaceable link, the test on the one-bay two-story and half story specimen at one-third scale was carried out under low-cycle reversed loading and the links were replaced twice. The failure mechanism, hysteretic behavior, ductility, rigidity degeneration and energy-dissipation of specimen were analyzed. Experimental studies and analysis show that the links of coupled steel plate-concrete composite shear walls first enters the plastic energy dissipation under horizontal load. After links were replaced the seismic performance of specimens can recover to the former performance levels. If the link end plate thickness selection is reasonable and the end plate remains elastic, the links can be removed and installed easily. The steel column bases cross section should be increased appropriately and the weld of column bases connection should be carefully designed in order to avoid stress concentration. The hysteretic curve of coupled steel plate-concrete composite shear walls with replaceable link is full and has good seismic performance. When the links are replaced before and after, the difference of skeleton curves of the specimens is very small, and the structural lateral stiffness is basically identical. After the specimen enters the reduced very small at the same displacement. Under the same the normal stress of side column bases is second largest, and stress is the smallest. plastic stage, the bearing capacity of the specimen is horizontal load the shear stress of the link is the largest, the steel beam, the middle column and shear wall steel stress is the smallest.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2016年第7期10-18,共9页
Journal of Building Structures
基金
江苏省高校自然科学研究重大项目(15KJA560002)
关键词
联肢组合剪力墙
钢连梁
拟静力试验
抗震性能
滞回性能
耗能能力
破坏机理
coupled composite shear wall
steel link
quasi-static test
seismic behavior
hysteretic behavior
energydissipation
failure mechanism
