内马铁路一期工程局部不规则二维场地地震反应分析  

Two Dimensional Seismic Response Analysis for Local Irregular Site of Nairobi-Malaba Railway

作　　者：王笃国 贾其军 尤红兵 翟奋楼[3] 薛齐齐 喻烟[4] Wang Duguo;Jia Qijun;You Hongbing;Zhai Fenlou;Xue Qiqi;Yu Yan(China Road&Bridge Corporation,Beijing 100011,China;China Earthquake Disaster Prevention Center,Beijing 100029,China;Beijing Computing Center,Beijing 100101,China;The Institute of Crustal Dynamics,China Earthquake Administration,Beijing 100085,China)

机构地区：[1]中国路桥工程有限责任公司,北京100011 [2]中国地震灾害防御中心,北京100029 [3]北京市计算中心,北京100101 [4]中国地震局地壳应力研究所,北京100085

出　　处：《震灾防御技术》2020年第4期708-717,共10页Technology for Earthquake Disaster Prevention

基　　金：地震科技星火计划项目(XH18060);北京市科委重大科技研发攻关项目(Z181100003918005);北京市科学技术研究院创新团队计划(IG201506C2)。

摘　　要：基于内马铁路一期工程地质资料,利用ABAQUS有限元软件建立某局部不规则二维场地有限元计算模型,利用Python语言进行二次开发,编制二维等效线性化计算程序。开展50年超越概率63%、10%和2%水准下的土层地震反应分析计算,对不规则地形不同位置处的地震动峰值加速度和频谱特性进行对比分析。研究结果表明,不规则地形对地震动特性的影响显著。本文研究结果对内马铁路一期工程地震动参数确定具有指导意义,同时可为跨越不规则地形工程结构抗震设计提供参考。Based on the engineering geological data,an irregular local 2D FEM soil site model was established by using Abaqus Software.Then,2D equivalent linear simulation program was coded by Python language.Through input motions with 63%、10%and 2%probabilities of exceedance in 50 years,2D site response analysis was conducted,and the peak ground acceleration and frequency-spectrum characteristics for different positions located at irregular topography with different exceeding probabilities was compared and analysized.Results show that local irregular topography greatly affects the characteristics of ground motion.The research results can be applied to derive the earthquake design parameters for Nairobi-Malaba railway,and can be referred to anti-seismic design of engineering structures crossing irregular topography.

关 键 词：铁路工程 二维等效线性化 不规则地形 地震动参数 土层反应 

分 类 号：U211.9[交通运输工程—道路与铁道工程]