基于可靠度的带暗支撑双肢剪力墙抗震性能研究  

Study on seismic performance of coupled shear wall with concealed bracings based on reliability

作　　者：汪梦甫[1] 闵潇潇 Wang Meng-fu;Min Xiao-xiao(College of Civil Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《工程抗震与加固改造》2023年第4期1-13,共13页Earthquake Resistant Engineering and Retrofitting

基　　金：国家自然科学基金项目(51578225,52078203)。

摘　　要：为研究带暗支撑双肢剪力墙在材料参数等不确定性下的可靠度,利用有限元软件OpenSees对带暗支撑双肢剪力墙进行可靠度分析,结合单设计参数分析与正交设计组合分析,得到了设计参数的限值及较优水平组合。分析结果表明:轴压比、高宽比、连梁跨高比增大会降低结构可靠指标,使结构偏于不安全,而暗支撑含钢率、连梁配筋率增大对结构的安全性能有利。根据研究结果,建议带暗支撑双肢剪力墙结构轴压比限制在0.6范围内,高宽比<2.8为宜,连梁跨高比可取1.0~2.5,暗支撑含钢率取0.67%~1.78%为宜,连梁配筋率取0.25%~0.45%为宜;在轴压比增大时,建议严格控制高宽比,减小连梁跨高比,增加暗支撑含钢率和连梁配筋率。In order to study the reliability of the coupled shear wall with concealed bracings under the uncertainty of material parameters and other uncertainties,the finite element software OpenSees is applied to analyze the seismic performance of the coupled shear wall with concealed bracings based on reliability.Combining single design parameter analysis with orthogonal design combination analysis,the limit values and better level combinations of design parameters are obtained.The analysis results show that the increase of the axial load ratio,the aspect ratio of coupled shear wall and the span ratio of coupling beam would reduce the structural reliability index and make the structure unsafe,while increasing the steel ratio of the concealed bracings and the reinforcement ratio of the coupling beam are beneficial to the safety performance of the structure.According to the research results,it is recommended that the axial load ratio of coupled shear wall with concealed bracings needs to be limited to 0.6,the aspect ratio of coupled wall should be less than 2.8,the aspect ratio of coupling beam can be taken 1.0 to 2.5,the steel ratio of concealed bracings should be 0.67%to 1.78%,and the reinforcement ratio of the coupled beam should be 0.25%to 0.45%;when the axial load ratio increases,it is recommended that the aspect ratio of coupled wall should be restricted,the aspect ratio of coupled beam should be reduced,and the steel ratio of the concealed bracings and the reinforcement ratio of the coupled beam should be increased.

关 键 词：带暗支撑双肢剪力墙 有限元分析 可靠度分析 抗震性能 

分 类 号：TU398.2[建筑科学—结构工程]