不同场地下楼梯对隔震结构减震性能的影响分析
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摘要
为了研究不同场地下楼梯对隔震结构减震性能的影响,本文依据场地的特征周期和频谱特性选取3种场地类别下的9条地震波作为输入激励,以某实际工程为背景,建立考虑楼梯影响和不考虑楼梯影响的两种隔震结构模型,应用数值分析软件Matlab2010对模型进行动力时程分析,研究了楼梯对不同场地下隔震结构的变形和减震效果的影响,探讨了场地对两种隔震结构模型减震性能的影响。结果表明:不同场地下楼梯对于隔震结构的变形和减震效果影响显著,考虑楼梯影响后隔震结构的上部结构变形减小,减震效果明显提高;场地对考虑楼梯的隔震结构的减震性能影响明显,随着场地土逐渐变软,楼梯对于隔震结构的减震性能影响程度逐渐减小。
In order to research the influence of the stair on the aseismic performance of isolated structure under different sites,9 sorts of earthquake waves under three kinds sites are selected as input excitation,and based on the practical engineering,two isolated structure models,which consider and not consider the influence of the stair,are established in this paper. The dynamic time history analysis of analysis of two modelsis carried out by numerical analysis software Matlab2010. The influence of stairon the deformation and aseismic effect of isolated structure under different sites is studied,and the influence of different sites on the aseismic performance of isolated structure considering the effect of stair is discussed. The results show that the stair has a great influence on the deformation and aseismic effect of isolated structure under different sites,the superstructure deformation of the isolated structure decreases and the aseismic effect. The effect of different sites has a great influence on the aseismic performance of isolated structure considering the stair,and along with the softening of site soil,the influence of stair on the aseismic performance of isolated structure is weakening gradually.
In order to research the influence of the stair on the aseismic performance of isolated structure under different sites,9 sorts of earthquake waves under three kinds sites are selected as input excitation,and based on the practical engineering,two isolated structure models,which consider and not consider the influence of the stair,are established in this paper. The dynamic time history analysis of analysis of two modelsis carried out by numerical analysis software Matlab2010. The influence of stairon the deformation and aseismic effect of isolated structure under different sites is studied,and the influence of different sites on the aseismic performance of isolated structure considering the effect of stair is discussed. The results show that the stair has a great influence on the deformation and aseismic effect of isolated structure under different sites,the superstructure deformation of the isolated structure decreases and the aseismic effect. The effect of different sites has a great influence on the aseismic performance of isolated structure considering the stair,and along with the softening of site soil,the influence of stair on the aseismic performance of isolated structure is weakening gradually.
引文
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[3]林迟,孙爱伏,侯爽,欧进萍.都江堰市多龄期建筑楼梯间震害研究[J].大连理工大学学报,2009,49(5):776~780Ling Chi,Sun Ai-fu,Hou Shuang,Ou Jin-ping.The Study on Seismic Damage of Staircase for Multiple Ages Buildings in Dujiangyan City[J].Journal of Dalian University of Technology,2009,49(5):776~780(in Chinese)
[4]孟凡林,孟祥瑞,张维学.考虑楼梯影响的框架结构地震响应分析[J].工程抗震与加固改造,2012,34(1):14~19Meng Fan-lin,Meng Xiang-rui,Zhang Wei-xue.Earthquake Response Analysis of Frame Structure Considering Stair Influence[J].Earthquark Resistant Engineering and Retrofitting,2012,34(1):14~19(in Chinese)
[5]张望喜,刘长洋.考虑楼梯影响的5.12汶川地震灾区某典型教学楼弹塑性分析[J].防灾减灾学报,2015,35(5):699~706Zhang Wang-xi,Liu Chang-yang.Elastic-plastic Analysis of Typical Teaching Building in 5.12Wenchuan Earthquake Disaster Area with Regard to the Influence of Stairs.[J].Journal of Disaster Prevention and Mitigation Engineering,2015,35(5):699~706(in Chinese)
[6]丁永刚,王建强,张铭.不同类型结构中楼梯受力性能研究[J].世界地震工程,2014,30(2):122~128Ding Yong-gang,Wang Jian-qiang,Zhang Ming.Study on Mechanical Properties of Staircase in Different Type of Structures[J].World Earthquark Engineering,2014,30(2):122~128(in Chinese)
[7]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):21~28Wang Ya-yong.The Study on Design Response Spectrum,Time History Method and Energy Method[J].Journal of Building Structures,2000,21(1):21~28(in Chinese)
[8]杨博,李英民,赖明.结构时程分析法输入地震波的选择与控制[J].土木工程学报,2000,33(6):33~37Yang Bo,Li Yin-min,Lai Ming.Selection and Control of Earthquake Moves Input in Time History Method of Structure[J].China Civil Engineering Journal,2000,33(6):33~37(in Chinese)