半刚性框架-密肋框格防屈曲低屈服点钢板墙抗震性能试验研究  

Experimental study on seismic behavior of semi-rigid frame with buckling-restrained multi-stiffeners low yield point steel plate shear walls

作　　者：房晨[1] 郝际平[1] 樊春雷[1] 袁昌鲁[1] 郭昭[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《建筑结构学报》2015年第11期10-19,共10页Journal of Building Structures

基　　金：国家自然科学基金项目(51178381)

摘　　要：为研究半刚性框架-密肋框格防屈曲低屈服点钢板墙结构的抗震性能,对一榀1/3缩尺的结构试件进行拟静力试验,对其滞回性能、承载力、延性、刚度、耗能和节点转动性能等进行分析。结果表明:试件最终呈面内弯剪破坏,结构屈服、破坏顺序为内填钢板面内受剪屈服、区格屈曲直至撕裂,边缘构件进入屈服并最终在框架梁端与柱脚形成塑性铰,结构的破坏机理符合"强框架、弱墙板"、"强柱弱梁"的设计理念;内填钢板与外框架形成了有效的两道抗震设防防线,抗震性能优良;试件具有稳定的承载力与优异的塑性变形能力;结构整体刚度好,初始侧向刚度大;密肋框格的设置改善了内填钢板的受力性能,实现了防屈曲的目标,试件滞回曲线饱满呈梭形,具有良好的耗能能力;位移加载后期节点角钢虽然进入塑性工作状态,但在内填钢板"衬板"作用的加强下,未发生明显损坏,且试件的整体承载力保持稳定。A model specimen of single-bay and two and half stories semi-rigid frame with buckling-restrained multistiffeners low yield point steel plate shear wall,with 1 /3 scale,was tested under low-cycle reversed loading,in order to study seismic behavior of this new structure. By analyzing its hysteretic behavior,loading capacity,ductility,lateral stiffness,energy dissipation capability and rotational behavior of beam-column connections,it is showed that the specimen eventually exhibits in-plane flexure-shear failure. The failure mechanism is yielding and local buckling until tearing of the infill plate,then plastic hinges shaping at beam ends and column base of the perimeter frame,which is in accordance with design concepts of ‘strong peripheral frame and weak infill plate＇and ‘strong column and weak beam＇. There are effective dual seismic defense lines forming between outer frame and infill plate,indicating the structure has preferable seismic behavior. The specimen exhibits stable bearing capacity and good plastic deformation capacity,associated with considerable overall initial lateral stiffness during the experiment. The application of multistiffeners reaches the objective of buckling-restrained and improves mechanical behavior of steel plate,resulted in full hysteretic loops and energy dissipation capacity of specimens. The angle of beam-column connections of the specimen do not suffer obvious damage although plastic deformation is developed at last displacement loading stage,meanwhile the loading capacity of specimen still remains steady,both for the strengthening liner effect provided by infill plate.

关 键 词：半刚性框架 密肋框格防屈曲 低屈服点钢板墙 拟静力试验 抗震性能 

分 类 号：TU973.16[建筑科学—结构工程] TU317.1