采用剪力墙体外加固的中小学校舍框架结构抗震性能分析
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摘要
采用外加剪力墙的体外加固方法,对一个不满足抗震要求的4层中小学框架结构校舍进行加固.通过对不同加固方案的加固结构进行弹性和弹塑性地震反应分析,研究地震作用下不同加固方案对结构的抗震性能影响.数值分析结果表明:外加剪力墙可使原结构各榀框架所受的地震剪力有较大幅度的降低,剪力墙越宽,降幅越大;可使各楼层层间位移角趋于均匀,有效控制结构层间变形的集中,防止结构层屈服机制的出现;框架结构梁柱构件的塑性变形明显推迟,结构塑性铰发展减缓.
An external retrofitting shear wall is adopted to strengthen the middle and primary school 4-storey frame structure which don't meet the seismic requirement.According to elastic and elasto-plastic seismic response analysis,the seismic behavior of retrofitted frame using various strengthening plan was investigated.The analytical results show that the external retrofitting shear wall reduces obviously the seismic force of retrofitted frame,the width of shear wall is positive correlative to the reduction of seismic force,and the shear wall narrows the difference of drift ratio of each storey.Comparing with the original frame,The development of plastic hinge of retrofitted frame is postponed.
An external retrofitting shear wall is adopted to strengthen the middle and primary school 4-storey frame structure which don't meet the seismic requirement.According to elastic and elasto-plastic seismic response analysis,the seismic behavior of retrofitted frame using various strengthening plan was investigated.The analytical results show that the external retrofitting shear wall reduces obviously the seismic force of retrofitted frame,the width of shear wall is positive correlative to the reduction of seismic force,and the shear wall narrows the difference of drift ratio of each storey.Comparing with the original frame,The development of plastic hinge of retrofitted frame is postponed.
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):52-67.
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[8]Applied Technology Council.Sesimic evaluation and retrofit of concrete buildings,ATC-40[R].Redwood City:Ap-plied Technology Council,1996.
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[2]冯远,吴小兵,李从春,等.现浇楼梯对框架结构的抗震影响分析与建议[J].土木工程学报,2010,43(10):54-62.
[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):52-67.
[4]CABINET OFFICE.The building standard law of Japan[S].Tokyo:The Building Center of Japan,2004.
[5]叶列平.体系能力设计法与基于性态/位移抗震设计[J].建筑结构,2004,34(6):10-14.
[6]KALTAKICI M Y,ARSLAN M H,YILMAZ U S,et al.A new approach on the strengthening of primary schoolbuildings in Turkey:An application of external shear wall[J].Building and Environment,2008,43(6):983-990.
[7]潘毅,杨成,赵世春,等.基于Pushover方法的既有建筑结构安全性鉴定[J].西南交通大学学报,2010,45(2):174-178.
[8]Applied Technology Council.Sesimic evaluation and retrofit of concrete buildings,ATC-40[R].Redwood City:Ap-plied Technology Council,1996.
[9]张胜,甘明,纪青,等.基于结构位移性能的合肥游泳馆抗震设计[J].建筑结构,2006,36(6):48-51.
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