摘要
为研究隔震技术加固砌体结构房屋的可行性及适用性,以一栋层数和高度均超限的既有多层砌体结构教学楼为对象,详细介绍隔震加固设计全过程,并利用软件ETABS对隔震加固后的结构进行分析。结果表明,隔震加固后,砌体结构的自振周期明显延长,地震响应显著降低;变形集中于隔震层,隔震层以上结构层间位移角在设防地震作用下远小于2倍弹性层间位移角限值,在罕遇地震作用下远小于4倍弹性层间位移角限值,满足了预定的抗震性能目标;隔震支座的水平位移和拉/压应力也远小于规范限值。隔震层以上结构X、Y向减震系数最大值分别为0.301和0.379,均小于0.4,结构构造措施可按比设防烈度降低一度确定,解决了结构层数和高度超限问题。
In order to study the feasibility and application of seismic isolation technology in masonry building strengthening,an existing multi-story masonry teaching building with out-of-limit floors and height was taken as the research object.The whole process of seismic isolation strengthening design was introduced in detail,and the finite element software ETABS was used to analyze the structure strengthened by the seismic isolation technology.The results show that after seismic isolation strengthening,the natural period of the masonry structure is significantly prolonged,and the seismic response is significantly reduced.The deformation is concentrated on the isolation layer.The inter-story drift ratio of the structure above the isolation layer is far less than the limit value of 2 times the elastic inter-story displacement ratio under fortification earthquake,and far less than the limit value of 4 times the elastic inter-story displacement ratio under rare earthquake,meeting the predetermined seismic performance target.The horizontal displacement and tensile/compressive stress of the isolation bearing are also far less than the limit value of the code.The maximum damping coefficients of the structure above the isolation layer in X and Y directions are 0.301 and 0.379,respectively,both of which are lower than 0.4.The constructional measures can be determined by reducing the specific fortification intensity by one degree,which solves the problem of out of the limitation of floors and height.
作者
周巧玲
赵仕兴
彭敏
吴菲
唐元旭
杨姝姮
ZHOU Qiaoling;ZHAO Shixing;PENG Min;WU Fei;TANG Yuanxu;YANG Shuheng(Sichuan Provincial Architectural Design and Research Institute Co.,Ltd.,Chengdu 610095,China;Complex Structure Design and Research Center,Sichuan Provincial Architectural Design and Research Institute Co.,Ltd.,Chengdu 610095,China)
出处
《建筑结构》
北大核心
2023年第7期18-23,49,共7页
Building Structure
基金
2021年度四川省住房城乡建设领域科技创新课题(SCJSKJ2021-24)
四川省建筑设计研究院有限公司科研项目(KYYN202111)。
关键词
砌体结构
既有建筑
检测鉴定
隔震加固
橡胶支座
masonry structure
existing building
test appraisal
seismic isolation strengthening
rubber bearing
