楼梯间减震防倒塌支座设计与探讨
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摘要
结合近年来地震中现浇钢筋混凝土框架结构楼梯的破坏特点,针对现行楼梯设计中存在的问题,提出了在框架结构楼梯间的梯板与梯梁之间设置减震防倒塌支座,卸掉梯板斜撑效应的同时,保证楼梯间结构大震不倒。通过算例分析了各种楼梯结构做法的抗震性能,指出传统滑动支座做法存在的安全隐患。最后提出了楼梯间减震防倒塌支座的设计方法。
According to the damage feature of a stair for reinforced concrete frame in an earthquake and the specifics of problems in the current design of a stair,damping and collapse preventing bearing for reinforced concrete frames were submitted based on the sliding bearing in the current standard and the schematic handbook of problems in the current design of a stair. The seismic behavior of different kinds of stair structures was analyzed. Pushover and elasto-plastic time history analysis of traditional sliding bearing and damping and collapse preventing bearing were conducted and hidden danger of traditional sliding bearing was indicated. Finally,a design method of damping and collapse preventing bearing was proposed.
According to the damage feature of a stair for reinforced concrete frame in an earthquake and the specifics of problems in the current design of a stair,damping and collapse preventing bearing for reinforced concrete frames were submitted based on the sliding bearing in the current standard and the schematic handbook of problems in the current design of a stair. The seismic behavior of different kinds of stair structures was analyzed. Pushover and elasto-plastic time history analysis of traditional sliding bearing and damping and collapse preventing bearing were conducted and hidden danger of traditional sliding bearing was indicated. Finally,a design method of damping and collapse preventing bearing was proposed.
引文
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[9]赵玉星,杨青,李立勇,等.框架合理结构体系的楼梯半滑支抗震设计[J].工业建筑,2012,42(1):94-97.ZHAO Yuxing,YANG Qing,LI Liyong,et al.Seismic design by semi-slip-supported stair for reasonable structural system of the frame building[J].Industrial Construction,2012,42(1):94-97.(in Chinese)
[10]蒋欢军,王斌,吕西林,等.钢筋混凝土框架结构楼梯震害分析与设计建议[J].振动与冲击,2013,32(3):22-28.JIANAG Huanjun,WANG Bin,LXilin,et al.Seismic damage analysis and design suggestions for staircases in RC frame structures[J].Journal of vibration and shock,2013,32(3):22-28.(in Chinese)
[11]11G101-2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].北京:中国计划出版社,2011.11G101-2 The Rules and Structural Details of Concrete Construction Drawing in the Way of Overall Plane Expression[S].Beijing:China Planning Press,2011.(in Chinese)
[2]尹保江,黄世敏,程绍革,等.汶川地震中建筑楼梯震害原因分析[M].北京:中国建筑工业出版社,2008:280-284.YIN Baojiang,HUANG Shimin,CHENG Shaoge,et al.Analysis of the causes for staircases in the Wenchuan earthquake[M].Beijing:China Architecture&Building Press,2010:280-284.(in Chinese)
[3]Ricci P,Luca F D,Verderame G M.6Th april 2009 l`aquila earthquake,Italy:reinforced concrete building performance[J].Bulletin of Earthquake Engineering,2011,9(1):285-305.
[4]尹保江,罗开海,薛彦涛,等.玉树4.14地震钢筋混凝土框架震害调查与分析[J].土木建筑与环境工程,2010,32(增2):6-8.YIN Baojiang,LUO Kaihai,XUE Yantao,et al.Earthquake damage investigation and analysis of reinforced concrete frame structure in Yushu4.14 earthquake[J].Journal of civil&Environment Engineering,2010,32(S2):6-8.(in Chinese)
[5]Kam W Y.Preliminary report from the Christchurch 22 Feb 201l 6.3Mw earthquake:pre-1970s RC and RCM buildings,and precast staircase damage[R].Draft report,2011.
[6]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB 50011-2010 Code for Seismic Design of Buildings[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[7]JGJ3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.JGJ3-2010 Technical Specification for Concrete Structure of Tall Building[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[8]罗开海,王亚勇,左琼,等.地震作用下钢筋混凝土框架结构中楼梯构件的影响效果分析[J].建筑结构,2011,41(11):88-93.LUO Kaihai,WANG Yayong,ZUO Qiong,et al.Analysis on action effects of stairs in RC frame structure under earthquake[J].Building Structure,2011,41(11):88-93.(in Chinese)
[9]赵玉星,杨青,李立勇,等.框架合理结构体系的楼梯半滑支抗震设计[J].工业建筑,2012,42(1):94-97.ZHAO Yuxing,YANG Qing,LI Liyong,et al.Seismic design by semi-slip-supported stair for reasonable structural system of the frame building[J].Industrial Construction,2012,42(1):94-97.(in Chinese)
[10]蒋欢军,王斌,吕西林,等.钢筋混凝土框架结构楼梯震害分析与设计建议[J].振动与冲击,2013,32(3):22-28.JIANAG Huanjun,WANG Bin,LXilin,et al.Seismic damage analysis and design suggestions for staircases in RC frame structures[J].Journal of vibration and shock,2013,32(3):22-28.(in Chinese)
[11]11G101-2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].北京:中国计划出版社,2011.11G101-2 The Rules and Structural Details of Concrete Construction Drawing in the Way of Overall Plane Expression[S].Beijing:China Planning Press,2011.(in Chinese)
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