侧向荷载分布方式对高层建筑静力弹塑性分析结果的影响
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摘要
Pushover方法作为一种建筑结构弹塑性地震响应的简化近似计算方法和抗震性能评价方法已得到广泛应用。但由于其理论基础不严密,其准确性需要给予必要确认,同时其适用性也受到一定的限值。就侧向荷载分布方式,对静力弹塑性pushover分析结果的影响进行了研究。用四种不同的侧向荷载分布方式,对一栋24层的高层结构进行了分析。分析结果表明:在不同侧向荷载分布方式作用下,pushover分析结果相差很大。就分析结果而言,选择实时模态的荷载分布方式更为合理。
The nonlinear static pushover analysis procedure is now widely used as a simple method to estimate the inelastic seismic response for building structures. However, the accuracy of the method still needs to be validated because of the inherent limitations in its theory. Besides, there are some limitations on the application of this method. In this paper, the influence of lateral load patterns on the results of static pushover analysis has been studied. The static pushover analysis with four different lateral load patterns was applied to a tall building of 24 stories. It is demonstrated that the analysis results may vary significantly under different lateral load patterns. In terms of the analysis results, feasibility load pattern is more reasonable.
The nonlinear static pushover analysis procedure is now widely used as a simple method to estimate the inelastic seismic response for building structures. However, the accuracy of the method still needs to be validated because of the inherent limitations in its theory. Besides, there are some limitations on the application of this method. In this paper, the influence of lateral load patterns on the results of static pushover analysis has been studied. The static pushover analysis with four different lateral load patterns was applied to a tall building of 24 stories. It is demonstrated that the analysis results may vary significantly under different lateral load patterns. In terms of the analysis results, feasibility load pattern is more reasonable.
引文
[1]Applied Technology Council,Seismic evaluation and retrofit of concrete buildings[S].ATC-40,1996.
[2]FEMA273,FEMA274,FEMA356.NEHRP Guidelines for the Seismic Rehabilitation of Buildings[S].Washington DC:Federal Emergency Management Agency,1996.
[3]中华人民共和国住房和城乡建设部.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]熊向阳,戚震华.侧向荷载分布方式对静力弹塑性分析结果的影响[J].建筑科学,2001,17(5):8~13
[5]侯爽,欧进萍.结构Pushover分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89~97.
[6]中国建筑科学研究院PKPMCAD工程部.多层及高层建筑结构弹塑性静力、动力分析软件PUSH&EPDA用户手册及技术条件[M].北京:中国建筑科学研究院,2008.
[7]汪大绥,贺军利,芮明倬,等.带有剪力墙(筒体)结构静力弹塑性分析方法与应用[J].建筑结构,2006,36(7):8-12.
[2]FEMA273,FEMA274,FEMA356.NEHRP Guidelines for the Seismic Rehabilitation of Buildings[S].Washington DC:Federal Emergency Management Agency,1996.
[3]中华人民共和国住房和城乡建设部.GB50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[4]熊向阳,戚震华.侧向荷载分布方式对静力弹塑性分析结果的影响[J].建筑科学,2001,17(5):8~13
[5]侯爽,欧进萍.结构Pushover分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89~97.
[6]中国建筑科学研究院PKPMCAD工程部.多层及高层建筑结构弹塑性静力、动力分析软件PUSH&EPDA用户手册及技术条件[M].北京:中国建筑科学研究院,2008.
[7]汪大绥,贺军利,芮明倬,等.带有剪力墙(筒体)结构静力弹塑性分析方法与应用[J].建筑结构,2006,36(7):8-12.