中小学建筑RC框架-砌体混合结构抗震性能  

Anti-seismic behaviors of RC frame and masonry wall mixed structure in primary and middle school buildings

作　　者：孙伟民[1] 郭樟根[1] 丁帅[1] 倪天宇[1] 沈丹[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2009年第1期60-65,共6页Journal of Nanjing Tech University(Natural Science Edition)

摘　　要：RC框架-砌体混合结构在我国欠发达地区村镇中小学建筑中得到了广泛的应用,但该结构体系受力机理和抗震性能等尚不明确;通过一榀RC框架-砌体混合结构在水平低周反复荷载作用下的试验,考察裂缝的产生、开展和混合结构的破坏形态,分析RC框架-砌体混合结构的延性、耗能能力等抗震性能,研究混合结构的受力全过程和受力机理.结果表明:框架由于刚度较小,加载初期,墙体承担了大部分水平剪力,首先被破坏,墙体破坏后框架承担了大部分荷载,整个混合结构被各个击破.在此基础上,提出了RC框架-砌体混合结构的抗震鉴定和加固建议.Mixed structure of RC frame and masonry wall is widely used in primary and middle school buildings in underdeveloped areas. But the loading mechanism and the anti-seismic behavior of such structure are not clear. One specimen with one-span RC frame connected with masonry wall was tested under both constant vertical load and horizontal low cyclic load to investigate the crack generating and developing, and structure failure pattern, and to analyze anti-seismic behaviors, such as its ductility, ener- gy-dissipation, etc. The results show that the rigidity of the frame is relatively low in the earthquake, the wall must bear a large part of the shear force, thus it will be destructed firstly, and then the frame under- takes most of the load and will be destructed soon. The entire composite structure was destroyed part by part. Based on the test, some advices are presented for anti-seismic behavior appraiser and strenthening this kind of composite structure.

关 键 词：混合结构 抗震性能 破坏特征 滞回曲线 

分 类 号：TU398.5[建筑科学—结构工程]