外廊式单跨框架结构加柱静力弹塑性分析
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摘要
发展单跨悬挑外廊改为双跨的加固方法,为对外廊式单跨框架结构进行抗震加固提供参考。选择5种截面尺寸不同的柱,分别对一外廊式单跨框架结构挑梁端部进行加柱,使原结构横向变为双跨体系,并进行静力弹塑性分析。结果表明,运用该方法对结构进行加固后,结构抗震性能明显加强;根据实际情况和目标性能可选出最优截面柱用以加固。本文所做的分析,对单跨悬挑外廊改为双跨加固方法的实际应用有一定参考价值。
The aim of the study is to develop the strengthening approach that changes the structure with cantilevered gallery from single-span into double-span,which can provide the basis for the seismic strengthening on gallery type single-span frame.The cantilever ends of a gallery type single-span frame were reinforced by five kinds of columns with different sizes respectively to change the original structure into a double-span system in the horizontal direction,and the nonlinear static analysis was done for it.The results show that the seismic performance of structure improves significantly after strengthening with the approach in this paper,and the best column can be selected according to the actual situation and the target performance.The analysis in this paper has some reference value for the practical application of strengthening approach that changes the structure with cantilevered gallery from single-span into double-span.
The aim of the study is to develop the strengthening approach that changes the structure with cantilevered gallery from single-span into double-span,which can provide the basis for the seismic strengthening on gallery type single-span frame.The cantilever ends of a gallery type single-span frame were reinforced by five kinds of columns with different sizes respectively to change the original structure into a double-span system in the horizontal direction,and the nonlinear static analysis was done for it.The results show that the seismic performance of structure improves significantly after strengthening with the approach in this paper,and the best column can be selected according to the actual situation and the target performance.The analysis in this paper has some reference value for the practical application of strengthening approach that changes the structure with cantilevered gallery from single-span into double-span.
引文
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[2]莫庸,金建民,杜永峰,等.高度重视外廊式单跨多层砖房的抗震设计———5.12汶川大地震甘肃陇南地区中小学教学楼、机关办公楼外廊式单跨多层砖房震害考察体会[J].工程抗震与加固改造,2008,30(4):60-63.Mo Yong,Jin Jianmin,Du Yongfeng,et al.Highlights on seismicdesign for gallery type single-span multilayer brick houses———ex-perience from seismic damages survey on gallery type single-spanmultilayer brick houses of teaching buildings of primary and middleschools and governmental office buildings in Longnan region duringthe Wenchuan earthquake on May 12th[J].Earthquake ResistantEngineering and Retrofitting,2008,30(4):60-63(in Chinese).
[3]徐向东.汶川大地震中小学校舍震害调查[J].山东建筑大学学报,2008,23(6):551-554.Xu Xiangdong.A report on the damages of school buildings in greatWenchuan earthquake[J].Journal of Shandong Jianzhu Universi-ty,2008,23(6):551-554(in Chinese).
[4]汪大绥,贺军利,张凤新.静力弹塑性分析(Pushover Analysis)的基本原理和计算实例[J].世界地震工程,2004,20(1):45-53.Wang Dasui,He Junli,Zhang Fengxin.The basic principle and acase study of the static elastoplastic analysis(pushover analysis)[J].World Earthquake Engineering,2004,20(1):45-53(in Chi-nese).
[5]李刚,程耿东.基于性能的结构抗震设计———理论、方法与应用[M].北京:科学出版社,2004.Li Gang,Cheng Gengdong.Performance-based seismic design———theory,methods and applications[M].Beijing:Science Press,2004(in Chinese).
[6]GB50011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2002.GB 50011—2001 seismic design code of buildings[S].Beijing:China Architecture﹠Building Press,2002(in Chinese).
[7]闵强.应用“强柱”加固理念,加快都江堰建设步伐[J].工程抗震与加固改造,2009,31(5):111-116.Min Qiang.Quicken rebuilding steps of Dujiangyan city by usingthe theory o“f strong post”reinforcement[J].Earthquake ResistantEngineering and Retrofitting,2009,31(5):111-116(in Chinese).
[8]蔡宇祥,方侠敏.汶川地震引发的对框架结构抗震设计的思考[J].施工技术,2008,37(增刊):464-466.Cai Yuxiang,Fang Xiamin.Thinking on seismic design of framestructure triggered by Wenchuan earthquake[J].ConstructionTechnology,2008,37(supplementary issue):464-466(in Chi-nese).
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