汶川地震中板式楼梯的破坏分析及抗震措施
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摘要
通过汶川地震震害调查,对板式楼梯的破坏形态进行了重点研究,分析了建筑楼梯的震害机理.研究表明:在罕遇地震下,板式楼梯应考虑楼板平面内偏心轴力和竖向地震作用的影响;板式楼梯梯段板1/4～3/4跨度范围内应加强受压区配筋,以抵抗偏心轴力及竖向往复荷载下横截面受压区混凝土产生的拉应力,并从设计角度提出了楼梯结构抗震设计的改进措施.
Through the Wenchuan earthquake damage survey which mainly focuses on the analysis of the form of the de-struction of plate stairs,damage mechanisms of the stairs in the earthquake are analyzed.The research indicates that,in big earthquakes,the influence of partiality axis force of in-plane floor and vertical seismic action should be considered in plate-stair design.Pressure range reinforcement should be strengthened for plate stair section board in 1/4～3/4 span in order to resist eccentric axial force and tensile stress of concrete in transverse compressed area under vertical reciprocating load.And then from the perspective of design,stair anti-seismic design improvement measures are put forward.
Through the Wenchuan earthquake damage survey which mainly focuses on the analysis of the form of the de-struction of plate stairs,damage mechanisms of the stairs in the earthquake are analyzed.The research indicates that,in big earthquakes,the influence of partiality axis force of in-plane floor and vertical seismic action should be considered in plate-stair design.Pressure range reinforcement should be strengthened for plate stair section board in 1/4～3/4 span in order to resist eccentric axial force and tensile stress of concrete in transverse compressed area under vertical reciprocating load.And then from the perspective of design,stair anti-seismic design improvement measures are put forward.
引文
[1]03G101—2(2003),混凝土结构施工图平面整体表示方法制图规则和构造详图[S].
[2]郭继武.建筑抗震设计[M].2版.北京:中国建筑工业出版社,2006.
[3]申跃奎.框架结构楼梯的震害分析与设计对策[J].建筑结构,2009,39(11):72-100.
[4]刘文锋.混凝土结构设计原理[M].北京:高等教育出版社,2004.
[5]GB50011—2008,建筑抗震设计规范[S].
[6]贾俊峰,欧进萍.近断层竖向与水平向加速度反应谱比值特征[J].地震学报,2010,32(1):41-50.
[2]郭继武.建筑抗震设计[M].2版.北京:中国建筑工业出版社,2006.
[3]申跃奎.框架结构楼梯的震害分析与设计对策[J].建筑结构,2009,39(11):72-100.
[4]刘文锋.混凝土结构设计原理[M].北京:高等教育出版社,2004.
[5]GB50011—2008,建筑抗震设计规范[S].
[6]贾俊峰,欧进萍.近断层竖向与水平向加速度反应谱比值特征[J].地震学报,2010,32(1):41-50.
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