摇摆桁架-钢框架结构的刚度比需求及地震响应分析  

DEMAND STIFFNESS RATIO AND EARTHQUAKE RESPONSE ANALYSIS OF ROCKING TRUSS-STEEL FRAME SYSTEM

作　　者：贾明明[1,2] 周洲 吕大刚[1,2] 杨宁[1,2] JIA Ming-ming;ZHOU Zhou;LüDa-gang;YANG Ning(Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]哈尔滨工业大学,结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]哈尔滨工业大学,土木工程智能防灾减灾工业和信息化部重点实验室,哈尔滨150090

出　　处：《工程力学》2018年第10期66-74,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51378162,51678209);国家科技支撑计划子课题项目(2013BAJ08B01);教育部留学回国人员科研启动基金项目(2014);黑龙江省留学归国人员科学基金项目(40000045-6-15455);哈尔滨市科技创新人才基金项目(2013RFQXJ122)。

摘　　要：摇摆墙体系作为一种具有良好工程应用前景的新型结构形式被越来越多的工程人员所接受,但其自重大、易开裂、增大结构质量等问题一直困扰着广大科研人员。考虑到传统的摇摆墙体系的诸多不足,该文提出了摇摆桁架-钢框架体系,并对摇摆桁架的设计方法进行了探索与研究,给出了基于需求刚度比的设计建议。基于小、中、大震作用下的时程分析,对耗能构件的能量耗散以及累积位移延性进行了分析,研究了摇摆桁架-钢框架体系塑性铰形成过程以及结构的地震失效模式。结果表明,采用摇摆桁架-钢框架体系能显著改善、优化和控制钢框架结构的地震失效模式,提高结构的抗震性能。摇摆桁架体系作为-种新型摇摆结构,其功能可恢复性明显高于传统的抗震设计结构。As a new structural system with good engineering applications,the rocking wall system has been accepted by more and more engineers.However,rocking walls have high self-weight,which also increase the total weight of structures.Rocking concrete walls are easy to crack.The deficiencies of rocking walls are problems that the researchers have been confronting.In view of the shortcomings of the traditional rocking wall system,a rocking truss-steel frame system was put forward in this paper.Meanwhile,a design method of the rocking truss-steel frame was proposed and a design recommendation based on demand stiffness ratio was presented.Based on time history analysis under frequent,moderate and rare earthquakes,the energy absorbing capacity and cumulative displacement ductility of energy dissipation components were analyzed.Moreover,the plastic hinge developing process of structural failure modes was discussed.The results show that the failure modes of steel frame structures can be improved,optimized and controlled by the adoption of a rocking truss-steel frame system,so the seismic performance of the structures can be improved.As a new type of rocking structures,the resilience of the rocking truss-steel frame system is more effective than traditional seismically designed structures.

关 键 词：摇摆桁架-钢框架体系 需求刚度比 失效模式 抗震性能 滞回性能 

分 类 号：TU352.11[建筑科学—结构工程]