BRB应用于混凝土框架的弹性层间位移角限值与设计建议  

Story Drift Limit for BRB-concrete Frame Structures and Design Suggestions

作　　者：李国强[1,2] 王鹏[1] 刘玉姝[1,2] 蔡克铨[3] 

机构地区：[1]同济大学土木工程学院,上海20092 [2]同济大学土木工程防灾国家重点实验室,上海20092 [3]台湾大学土木工程系,台湾台北10668

出　　处：《工程抗震与加固改造》2013年第2期91-96,共6页Earthquake Resistant Engineering and Retrofitting

基　　金：国家十二五科技支撑计划(2012BAJ103B02);国家自然科学基金(51108340)

摘　　要：BRB钢支撑即屈曲约束支撑,因其具有承受轴向压力不会发生屈曲、受拉与受压承载力相当、滞回曲线饱满、耗能能力和低周疲劳性能良好等优点,在美国、日本及我国台湾等地区的建筑结构中应用较广。混凝土框架结构,是一种常见的建筑结构形式,其设计简单,施工方便,但是框架结构的抗侧刚度低,在罕遇地震下容易发生较大的侧移甚至是倒塌,而将BRB应用于混凝土框架结构,组成的框架-支撑结构体系,可以很好地解决这一问题。然而现行《建筑抗震设计规范》(GB50011-2010)对钢支撑-混凝土框架的层间位移角限值的规定不尽合理,本文从结构抗震的性能目标出发,对BRB钢支撑-混凝土框架的弹性层间位移角限值进行了研究,并提出了BRB在混凝土框架结构应用中的设计建议。BRB stands for buckling-restrained braces, it will not buckle under axial compression, the capacity of compression and pull is almost the same, the hysteresis curve is full, the capacity of energy dissipation and the low fatigue property are good. So BRB is popular in the buildings in the United States, Japan and China＇ s Taiwan. Concrete frame structure is a common structure system, the design is simple and the construction is easy. However, the seismic performance of the concrete frame structure is limited, as the small lateral stiffness, it will have big lateral displacement and even collapse in the severe earthquake. If BRB is used to the concrete frame structure, the structure will become a support-frame structure system and it can solve this problem. The current limit of ＂ The Seismic Design of Buildings （ GB50011 - 2010） on the drift of the steel support-concrete frame is not reasonable. Therefore, considering the seismic performance, the drift limit of the BRB-eoncrete frame is analyzed and the design proposals of the BRB in the concrete frame structure is put forword in this paper.

关 键 词：BRB 混凝土框架 层间位移角 设计建议 

分 类 号：TU375.4[建筑科学—结构工程] TU352.11