高强钢组合K形偏心支撑框架抗震性能影响参数分析(Ⅱ)  

Effect of parameters on seismic performance of the high strength steel composite K-eccentrically braced frames (Ⅱ)

作　　者：田小红[1] 苏明周[2] 李慎[3] 杨水成[1] TIAN Xiao-hong;SU Ming-zhou;LI Shen;YANG Shui-cheng(School of Mechanical and Precision Instrument Engineering,Xi’an University of Technology,Xi’an 710048,China;School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;School of Civil Engineering and Architecture,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学机械与精密仪器工程学院,陕西西安710048 [2]西安建筑科技大学土木工程学院,陕西西安710055 [3]西安理工大学土木建筑工程学院,陕西西安710048

出　　处：《广西大学学报（自然科学版）》2020年第1期129-137,共9页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51178382)

摘　　要：为研究不同参数对高强钢组合K形偏心支撑框架结构在罕遇地震作用下的受力和变形能力的影响,以耗能梁段腹板高厚比、结构高跨比以及支撑布置形式为参数,对高强钢组合K形偏心支撑框架结构(耗能梁段为Q345钢,框架梁柱及支撑为Q460钢)进行了动力时程分析。分别研究了各参数对结构周期、层间位移角和楼层剪力、耗能梁段受力及变形的影响。研究表明:耗能梁段腹板高厚比取为34.5~52.0较为合理;高跨比H/L1取为0.5~0.7并适当增大无支撑跨高跨比H/L2,可减小结构层间位移角和耗能梁段变形,使各框架柱受力更均匀;支撑沿竖向连续布置时,结构内力比支撑沿竖向错列、均匀布置时更均匀,支撑宜尽量沿同跨竖向连续布置,且各支撑跨水平方向不宜太分散。To study the influence of various parameters on the deformation and bearing capacity of high-strength steel combined with K-eccentrically braced frames(K-HSS-EBFs)under rare earthquake,dynamic elastic-plastic analyses were conducted to study the influence of link-arrangements.The effects of various parameters on the natural period,story drift,and shearing force of a structure,as well as those on the internal force and link deformation,were studied.The results show that a reasonable range of the height-to-thickness of link webs is 34.5~52.0.When the depth-span ratio of structures H/L1 is 0.5~0.7 and the depth-span ratio H/L2 was appropriately increased,the story drift and the deformation of the link can be reduced,so that the force of each frame column was more uniform.When the braces were continuously arranged in the vertical direction,the force of the structure was more uniform than that of the brace along the vertical staggered or evenly arranged,so the brace should be arranged continuously along the vertical direction as much as possible rather than be too scattered across the horizontal direction.

关 键 词：高强钢 偏心支撑 腹板高厚比 高跨比 支撑布置方式 抗震性能 

分 类 号：TU391[建筑科学—结构工程]