某框架结构加固改造与加层抗震性能分析*
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(1 兰州交通大学甘肃省道路桥梁与地下工程重点实验室, 兰州 730070;2 兰州交通大学土木工程学院, 兰州 730070)[摘要]针对高烈度地震区重点设防类建筑的加固改造与加层设计,以甘肃省天水市麦积区(8度0.3g)某钢筋混凝土框架结构商场为例,采用“外包钢板-增大构件截面-加设钢支撑”综合法对原框架结构房屋进行抗震加固,采用钢框架结构进行加层。通过对结构进行多遇地震作用下的弹性分析与罕遇地震作用下的弹塑性Pushover分析,发现采用该种加固改造、加层方法,能显著提高结构的抗震性能,且施工效率高、加固成本低。[关键词]框架结构; 高烈度地震区; 加固改造; 加层; Pushover分析中图分类号:TU375.4 文献标识码:A 文章编号:1002-848X(2015)09-0039-04Seismic performance analysis on a reinforcement transformation and story-adding frame structureLiu Tingbin1,2, Zhang Yudu2, Liu Shengwei2, Ma Xiaoming2, Zhang Di2, Zhang Jiawei1,2(1 Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province, Lanzhou Jiaotong University, Lanzhou 730070, China; 2 School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)Abstract:Taking a shopping mall located in Maiji District Tianshui City Gansu Province (8 degree, 0.3g) with reinforced concrete frame structure as an example, design for reinforcement transformation and story-adding in high-intensity earthquake region was introduced. Using the comprehensive method of outsourcing steel-enlarge member section-adding steel brace to reinforce the frame structure, steel frame structure was adopted to add stories. Through elastic analysis under frequent earthquake action and elastic-plastic Pushover analysis under rare earthquake action for the structure, seismic performance has been significantly improved due to the reinforcement transformation and story-adding method which leads to higher construction efficiency and lower cost.Keywords: frame structure; high-intensity earthquake region; reinforcement transformation; story-adding; Pushover analysis*长江学者和创新团队发展计划项目(IRT1139),甘肃省建设厅科技攻关项目(JK2012-13),兰州交通大学青年基金项目(2011032)。作者简介:刘廷滨,博士研究生,讲师, Email:315309723@qq.com。参考文献[1]丁群,赵建昌.高烈度地区框架加固加层抗震性能分析[J].低温建筑技术,2013(1):33-35.[2]璩家平,璩继立,茆会勇,等.某框架结构加固与加层改造工程分析[J].建筑结构,2010,40(5):74-96.[3]邵莲芬,刘凌云. 某砖混结构教学楼的加层与加固设计[J].建筑结构,2008,38(7):54-55.[4]陈招平,罗翔,张浩,等.轻钢增层结构的地震反应分析[J].工程抗震与加固改造,2008,30(6):105-108.[5]康晓菊,朱萱,曾爽,等.大路坡文体活动中心加固改造与加层设计[J].建筑结构, 2012,42(7): 103-105.[6]GB 50023—2009 建筑抗震鉴定标准[S].北京:中国建筑工业出版社,2009.[7]GB 50011—2010 建筑抗震设计规范[S]. 北京:中国建筑工业出版社,2010.[8]GB 50367—2006 混凝土结构加固设计规范[S].北京:中国建筑工业出版社,2006.[9]JGJ 116—2009 建筑抗震加固技术规程[S].北京:中国建筑工业出版社,2009.[10]DB 62/T25\|3055—2011 建筑抗震设计规程[S].兰州:甘肃省住房和城乡建设厅,甘肃省质量技术监督局, 2012.