钢板剪力墙结构边框柱的稳定性研究  

Study on the stability of surrounding columns in steel plate shear walls

作　　者：于金光[1,2] 解琦[1,3] 郝际平[1,2] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西部建筑科技重点实验室,陕西西安710055 [3]西安市建筑设计研究院,陕西西安710054

出　　处：《地震工程与工程振动》2015年第3期100-110,共11页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51178381);国家自然科学青年基金项目(51408461);陕西省教育厅专项科研项目(14JK1395);西安建筑科技大学人才基金项目(RC1376);西安建筑科技大学青年科技基金项目(QN1412)

摘　　要：钢板剪力墙结构是一种新型经济高效的抗侧力体系,由钢框架内嵌钢板组合形成。钢板剪力墙结构的边框柱在附加弯矩作用下常产生"沙漏"这种不良的破坏模式,为此加拿大CAN/CSA(S16-01)规范依据薄腹梁理论柔度系数ωt给出了钢板墙结构边框柱的最小惯性矩要求。薄腹梁理论适用于极薄板,而我国规范和实际应用中多选用厚板墙或加劲墙,板厚往往处于中厚板范畴,柔度系数ωt的适用性有待讨论。本文结合经典的边框柱柔度限值推导过程,利用承载力和应力均匀性两种评价方法,对CAN/CSA S16-01规范给出的柱柔度限值小于或等于2.5的适用性进行了验证。基于通用高厚比的概念给出了钢板剪力墙结构的弹性抗剪承载力,同时采用拉力场机制份额考虑了内嵌钢板厚度的影响,修正了柱柔度系数。研究结果表明钢板墙宽高比较大时,CAN/CSA S16-01规范限值不满足要求,柱柔度限值应缩小到2.1,对应边框柱的惯性矩要求应扩大为S16-01规范限值的2倍。Steel plate shear wall is considered to be a new type of high-efficiency aseismatic structure. If the vertical boundary elements in steel plate shear walls is weaker, the bad failure mode will occur. Based on the flexibility coefficient ω, of the thin-walled beam theory, CAN/CSA （ S16-01 ） and AISC give the minimum moment of inertia requirements of the vertical boundary elements. Although CAN/CSA （ S16-01 ） and AISC have given the specific quantitative requirements of flexibility coefficient, but infilled plates use the extremely thin plane in these countries. , and use often a thick wall or restrained wall in high-rise building structure in china. Thus application of flexibility coefficient should be discussed in china. In this paper, combining with the source of flexibility coefficient tot, we design the specimen by the orthogonal test table, use two kinds of evaluation methods, and prove the applicability of limitation of column flexibility according to the CAN/CSA S16-01 specification. The results show that the test specimen with higher height to width ratio is much harder to meet the requirement. When the limitation of column flexibility is under 2.1, the stability in plane could be guaranteed.

关 键 词：钢板剪力墙 边框柱稳定性 柱惯性矩阈值 抗剪承载力 边框柱挠度限值 

分 类 号：TU391[建筑科学—结构工程] P315.92[天文地球—地震学]