底层框架震损结构断柱装垫加固方法研究
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摘要
对汶川地震中底层框架震损或倒塌而其它层破坏较轻的框架结构和底框结构房屋的破坏原因进行了分析,为了避免该类结构需推倒重建造成的经济损失,提出了将隔震和消能减震技术应用于该类震损结构中的加固新方法——断柱装垫法,给出了基底断柱装垫、层间断柱装垫和层间断柱装垫加消能减震三种方案。结合某工程算例,对底层破坏的框架结构采用上述3种方案进行了分析,结果表明,采用断柱装垫方法加固底层框架震损而其它层破坏较轻的框架结构是可行的,并且加固后的结构抗震性能得到明显的改善,能达到新的抗震设防要求。
The damage characteristics and causes of the structures whose ground floor were suffered damage and the other floors were minor ones in WenChuan earthquake are studied,a suitable method of seismic retrofitting for this kind of damaged structures which cuts off the bottom damage columns and adds isolators is proposed.Three schemes are included in the method,they are removing the bottom story columns and adding isolators,cutting off the bottom damaged columns and adding isolators,the same with scheme 2 but with energy dissipation devices.This kind of damaged buildings could be reused due to the adoption of the method,so the reconstruction expense of disaster area is saved.Based on an engineering example,the above three schemes are analyzed.The analysis results indicate that the proposed retrofitting method is valid,and the structural seismic behavior of the damaged building could be obviously improved to meet the new earthquake fortification requirements of seismic code.
The damage characteristics and causes of the structures whose ground floor were suffered damage and the other floors were minor ones in WenChuan earthquake are studied,a suitable method of seismic retrofitting for this kind of damaged structures which cuts off the bottom damage columns and adds isolators is proposed.Three schemes are included in the method,they are removing the bottom story columns and adding isolators,cutting off the bottom damaged columns and adding isolators,the same with scheme 2 but with energy dissipation devices.This kind of damaged buildings could be reused due to the adoption of the method,so the reconstruction expense of disaster area is saved.Based on an engineering example,the above three schemes are analyzed.The analysis results indicate that the proposed retrofitting method is valid,and the structural seismic behavior of the damaged building could be obviously improved to meet the new earthquake fortification requirements of seismic code.
引文
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[3]叶列平,曲哲,马千里等.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52～59Ye Lie-ping,Qu Zhe,Ma Qian-li,et al.Study on ensuring the strong column-weak beam mechanism for RC frames based on the damage analysis in the Wenchuan earthquake[J].Building Structure,2008,38(11):52～59(in Chinese)
[4]程绍革,任卫教.钢筋混凝土框架结构抗震加固方法综述[J].建筑科学,2001,17(3):4～7Cheng Shao-ge,Ren Wei-jiao.Reviews on Seismic Strengthening of Existing R.C.Frame Structures[J].Building Science,2001,17(3):4～7(in Chinese)
[5]Zhou F L,Tan P,Xian Q L,et al.Research and application of seismic isolation system for building structures[J].Journal of Architecture and Civil Engineering,2006,23(2):1～8
[6]周云.粘滞阻尼减震结构设计[M].武汉:武汉理工大学出版社,2006Zhou Yun.Design of Structure with Viscous EnergyDissipated Devices[M].Wuhan:Wuhan University of Technology Press,2006(in Chinese)
[7]周云.防屈曲耗能支撑结构设计与应用[M].北京:中国建筑工业出版社,2007Zhou Yun.Design and application of structure with buckling-restrained braces[M].China Architecture&Building Press,2007(in Chinese)
[8]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006Zhou Yun.Design of Metallic Energy Dissipation Structure[M].Wuhan:Wuhan University of Technology Press,2006(in Chinese)
[9]上海材料研究所.粘滞阻尼器应用手册[R].上海,2006Shanghai Research institute of materials.Application manual of viscous damper[R].Shanghai,2006(in Chinese)
[10]COMPUTERS&STRUCTURES INC.The computer programs Perform-3d user guide[R].University avenue Berkeley,California,2006
[11]吴波,李洪泉,欧进萍.地震后有损伤结构的耗能减震加固设计[J].世界地震工程,1995,(2):1～7Wu Bo,Li Hong-quan,Ou Jin-ping.Seismic retrofit of earthquake damaged structures using energy dissipation devices[J].World Information On Earthquake Engineering,1995,(2):1～7(in Chinese)
[12]周福霖.工程结构减震控制[M].北京:地震出版社,1996Zhou Fu-lin.Seismic control of structure[M].Beijing:Seismological Press,1996(in Chinese)
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