增层框架-摇摆墙体系抗震性能研究  

Study on Seismic Performance of Adding Story Frame-Rocking Wall System

作　　者：朱春阳[1] 胡珂鑫 孙丽[1] 张力允 王玉婵 ZHU Chunyang;HU Kexin;SUN Li;ZHANG Liyun;WANG Yuchan(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第4期586-596,共11页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52078310);国家重点研发计划项目(2018YFC1504303)。

摘　　要：目的基于既有建筑的结构无法满足使用需求现状,通过质量调节及变形模式控制实现结构自振周期延长与损伤可控。方法提出增层框架-摇摆墙体系,对该结构进行理论分析,研究增层对整体结构地震效应的影响机理;利用SAP2000平台建立五个有限元模型,基于规范反应谱开展参数敏感性、静力弹塑性和动力弹塑性分析;并在此基础上,提出摇摆墙简化力学模型。结果增层的质量及高度对整体结构地震作用影响显著;与原框架相比,增层后结构基本自振周期最大延长31.7%,最大弹塑性极限位移响应降低11.5%,最大位移角响应降低20.2%,结构变形不均匀性降低22.0%;与框架-摇摆墙相比,增层后摇摆墙弯矩在弹塑性极限状态下降低33.9%。结论合理设置增层框架-摇摆墙可以小幅降低结构整体地震作用,减小结构地震响应,对结构变形模式可实现有效控制;所建立的摇摆墙简化力学模型可合理反应地震作用下墙体弯矩分布,并使设计偏于安全。Based on the current situation where some existing building structures cannot meet the usage requirements,the purpose of prolonging the structural natural vibration period and controlling the damage is realized by integrating the mass adjustment and deformation mode control.The method is to propose a story-adding frame-rocking wall system,analyze the structure theoretically,and study the influence mechanism of story-adding on the seismic effect of the overall structure.Five finite element models are established by using SAP2000 platform.Based on the standard response spectrum,the parameter sensitivity analysis,static and dynamic elastoplasticity analysis are carried out.On this basis,a simplified mechanical model of rocking wall is constructed.The results show that the quality and height of the added layer have a significant effect on the seismic action of the whole structure.Compared with the original frame,the maximum natural vibration period of the structure is extended by 31.7%,the maximum elastic-plastic ultimate displacement response is reduced by 11.5%,the maximum displacement angle response is reduced by 20.2%,and the structural inhomogeneity is reduced by 22.0%.Compared with the frame-rocking wall,the bending moment of the rocking wall is reduced by 33.9%in the elastic-plastic limit state.It is concluded that the reasonable addition of additional story-rocking wall can slightly reduce the overall seismic action of the structure,reduce the seismic response of the structure,and effectively control the structural deformation mode.The simplified mechanical model of rocking wall can reasonably reflect the bending moment distribution of wall under earthquake and make the design safer.

关 键 词：增层框架 框架-摇摆墙 抗震性能 动力学模型 有限元分析 

分 类 号：TU352.11[建筑科学—结构工程]