摘要
某多层砖混结构房屋由于使用面积不能满足要求,拟采用轻钢结构进行加层改造。目前普遍存在将加层作为附加重力施加在原建筑物顶部进行设计的做法,而不考虑加层后对建筑物整体抗震性能的影响。本文利用三维有限元方法,对主体结构加层前后进行了静力及动力学特性对比分析,总结出这种结构设计中的控制因素及变形特点,为该类结构的加层设计提供了有意义的借鉴。通过对比分析认为,对于与本文相似的建筑,加层部分按实际体型考虑和按附加质量考虑的抗震计算结果差异明显,甚至结论相反。
The usable floor area of the multi-storey brick-concrete structure could not meet the requirements, so the additional layer of light-weight steel structure would be used. There is a widespread practice of applying additional layers as an additional gravity to the top of the original building, regardless of the effect of the added layer on the seismic performance of the building. In this paper, 3-D finite element method is used to analyze the static and dynamic characteristics of the main structure before and after adding the light-weight steel layer. The controlling factors and deformation characteristics of the structural design are summarized, which provides a meaningful reference for the additional layer design of this kind of structure. Through the comparative analysis, for the similar projects, the seismic results of the additional layer are obvious difference, or even the opposite, according to the calculation by the actual size and by the additional quality.
作者
张亚英
赵春荣
崔炜
Zhang Ya-ying Zhao Chun-rong Cui Wei(Beijing Polytechnic College, Beijing 100042, China China Institute of Water Resources and Hydropower Research, Beijing 100038, China)
出处
《工程抗震与加固改造》
北大核心
2017年第4期136-140,共5页
Earthquake Resistant Engineering and Retrofitting
基金
2015年度北京市教育委员会科技面上项目"既有建筑加层改造技术研究"项目资助
项目号KM201510853003
北京工业职业技术学院2014年度重点科研项目"建筑新技术在工程中的应用研究"(项目号bgzykyz201413)
关键词
轻钢加层设计
模态分析
静动力特性分析
有限元
design of light-weight steel adding storey
mode analysis
static dynamic analysis
Finite Element
