坡地地形对竖向地震动反应谱特性的影响分析  

Influence of slope terrain on characteristics of vertical ground motion response spectra

作　　者：李英民[1,2] 王丽萍[2] 赵耀[2] 

机构地区：[1]重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 [2]重庆大学土木工程学院,重庆400045

出　　处：《地震工程与工程振动》2010年第5期156-161,共6页Earthquake Engineering and Engineering Dynamics

基　　金：教育部新世纪优秀人才支持计划资助项目(NCET-06-0765);国家科技支撑计划子课题资助项目(2009BAJ28B01-2);国家自然基金资助项目(90815011)

摘　　要：为分析坡地地形对竖向地震动反应谱特性的影响规律,采用有限元数值分析方法,对黏弹性岩质坡地在白噪声输入下的响应进行计算。分析了坡地地形对场地竖向反应谱及谱比的影响,研究了随着坡高及坡角的增加,坡地斜坡段及平台段竖向反应谱及谱比的变化规律,给出了坡地斜坡段及平台段设计竖向地震动放大系数,有关的研究结论可为坡地上工程结构的抗震设计提供参考。In order to discuss the influence of slope terrain on vertical ground motion response spectrum characteristics,the vertical seismic responses of the viscoelastic rock slopes excited by white noise were calculated by using the numerical finite element analysis method.The influences of slope terrain on the vertical ground motion response spectrum were analyzed.It is show that with the increase of the slope degree and slope height,the vertical response spectrum and the vertical spectrum ratios increase.The amplification factors of design vertical ground motions for the structures on the slope and the platform of slope terrain are suggested.

关 键 词：竖向地震动 反应谱谱比 坡地地形 

分 类 号：P315.98[天文地球—地震学]