框架结构剪切刚度的实用计算方法
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摘要
以6、8、12层平面钢筋混凝土框架结构作为算例模型,首先介绍了从层间水平总位移中减掉弯曲位移以得到剪切位移、并利用此位移来确定真实剪切刚度的计算方法;其次,提出了利用D值法理论刚度调整值和本文推导的刚度比与层数比的拟合曲线,来确定真实剪切弹性刚度实用值的方法和恢复力模型相关参数的方法。最后通过一个10层结构的例子进行了地震反应弹塑性时程分析,验证了真实剪切刚度实用计算方法的合理性和恢复力模型相关参数的可靠性。结果表明,所提的框架结构剪切弹性刚度实用值计算方法和各层恢复力模型参数的确定方法简单易懂,精度高,在确定剪切刚度环节中,可以替代繁琐复杂的推覆分析。
Taking plane reinforced concrete frames of 6-storey,8-storey and 12-storey respectively as examples,this paper,introduces a computational method for determining the true shear stiffness by use of the shear displacement which is difference between total interstorey displacement and flexural displacement. Secondly,the paper puts forward a method for determining practical value of true shear elastic stiffness and related parameters of the restoring force model by use of the adjusted stiffness from D-value method and the fitting curves between shear stiffness ratio and the storey ratio,Finally,taking a 10-storey structure as an example,its elastoplastic time history analysis was conduted,the rationality of the practical method for calculating true shear stiffness and reliabilily of relative parameters of restoring force model were varified. The results show that the presented practical calculation method for calculating elastic shear stiffness of frame structure and determination method for restoring forece model parameters are simple,easy and accurate and can replace complex pushover analysis.
Taking plane reinforced concrete frames of 6-storey,8-storey and 12-storey respectively as examples,this paper,introduces a computational method for determining the true shear stiffness by use of the shear displacement which is difference between total interstorey displacement and flexural displacement. Secondly,the paper puts forward a method for determining practical value of true shear elastic stiffness and related parameters of the restoring force model by use of the adjusted stiffness from D-value method and the fitting curves between shear stiffness ratio and the storey ratio,Finally,taking a 10-storey structure as an example,its elastoplastic time history analysis was conduted,the rationality of the practical method for calculating true shear stiffness and reliabilily of relative parameters of restoring force model were varified. The results show that the presented practical calculation method for calculating elastic shear stiffness of frame structure and determination method for restoring forece model parameters are simple,easy and accurate and can replace complex pushover analysis.
引文
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[2]裴星洙,王维,王星星.基于能量原理的隔震结构地震响应预测法研究[J].工程力学,2011,28(7):65-72.Pei Xingzhu,Wang Wei,Wang Xingxing.Earthquake response prediction of isolated structures based on energy principle[J].Engineering Mechanics,2011,28(7):65-72.
[3]GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.GB50011-2010 Code for seismic design of buildings[S].Beijing:China building industry press,2010.
[4]裴星洙,张立,任正权.高层建筑结构地震响应的时程分析法[M].北京:中国水利水电出版社,知识产权出版社,2006.Pei Xingzhu,Zhang Li,Ren Zhengquan.The time-history analysis method of seismic response on high-rise building structure[M].Beijing:China water conservancy and hydropower press,Intellectual property rights press,2006
[5]李海涛,张富强.高层建筑结构自振周期的计算方法探讨.河北建筑工程学院学报,2003,21(1):67.Li Haitao,Zhang Fuqiang.Approaches to Com Puting Natural Vibration Periodof Tall Building[J].Journal of Hebei Institute of Architectural Engineering,2003,21(1):67.
[6]日本隔振构造协会.被动减震结构设计施工手册[M].中国建筑工业出版社.2008.The association of vibration isolation structure in Japan.The design and construction of the manual of Passive suspension structure.China building industry press,2008.
[7]王社良.抗震结构设计[M].武汉:武汉理工大学出版社,2009.Wang Sheliang.The design of seismic structure[M].Wuhan:Wuhan university of technology press,2009
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