带填充墙的防屈曲支撑钢框架结构抗震性能分析*
- 摘 要
-
（1 大连理工大学建设工程学部，大连116026；2 哈尔滨工业大学土木工程学院，哈尔滨150090）[摘要] 为了探究填充墙以及防屈曲支撑的不同布置方式对结构抗震性能的影响，设计了10个4层6跨的防屈曲支撑钢框架平面模型，其中支撑采用了四种不同的布置方式，并按照考虑填充墙与否将模型分为两组。防屈曲支撑根据等刚度比的方法进行设计，填充墙用三撑杆模型模拟。利用SAP2000对各模型进行了基于8度设防标准的动力时程分析。结果表明，填充墙可以提高原结构的抗震性能，减小结构在地震（尤其是近场地震）作用下的位移反应；地震作用下，支撑的布置方式对框架柱中的轴力会产生不同的影响；考虑填充墙后，柱的轴力方向有时会发生变化，故在设计时应充分考虑填充墙对柱轴力的影响，以确保柱脚螺栓连接的有效性；防屈曲支撑的加入不会对框架柱的稳定造成不利影响。[关键词] 填充墙；防屈曲支撑；时程分析中图分类号：TU352.1 文献标识码：A 文章编号：1002-848X（2013）S1-1213-05Seismic analysis on buckling-restrained braced steel frames infilled with masonry wallsYang Yi1, Ma Ning1, Li Luyu1, Ou Jinping1, 2(1 Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116026, China; 2 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)Abstract: To explore the influence of masonry walls and arrangements of buckling-restrained braces (BRB) on the structure’s seismic performance, ten 4-story 6-bay buckling-restrained braced frame (BRBF) models with 4 different arrangements of BRBs are designed. The models are divided into two groups depending on whether masonry walls are considered. BRBs are designed so that the stiffness ratios of BRBs and frame stay the same. Masonry walls are modeled using the three-strut modeling method. According to seismic fortification intensity of 8, time-history analysis is carried out in SAP2000. The results show that masonry walls improve the structure’s seismic performances and reduce the displacement of structures under earthquakes (especially the near-field ones); the arrangements of BRBs affects column axial forces differently; once masonry walls are considered, the column axial forces may change their direction, so masonry walls should be taken into consideration thoroughly in order to guarantee the effectiveness of column bolt connection; BRBs will not adversely affect the stability of frame columns.Keywords: masonry walls; buckling-restrained braces; time-history analysis*国家自然科学基金（51108063），国家科技支撑计划项目（2011BAK02B02），地震行业专项课题（201108006）。作者简介：杨奕，硕士研究生，Email: huoqilin8197@163.com。
