2015年4月25日尼泊尔廓尔喀MS8.1级地震强地面运动

被引:2
作者
王宏伟
徐培彬
温瑞智
任叶飞
机构
[1] 中国地震局工程力学研究所
关键词
廓尔喀地震; 强地震动; 速度脉冲; 非线性反应; 设计反应谱;
D O I
暂无
中图分类号
P315.9 [工程地震];
学科分类号
070801 ;
摘要
2015年4月25日尼泊尔廓尔喀地区发生MS8.1级地震,本文分析了加德满都强震台站的强地震动记录特征,其水平向地震动表现为明显的脉冲地震动,脉冲周期约为6.0s,反映了近场地震动的方向性效应;处于深厚沉积层上的加德满都谷地对地震动有一定的放大作用,且主震的场地峰值频率向低频段偏移,出现明显的场地非线性反应;采用随机有限断层方法模拟的空间地震动分布与宏观地震烈度图符合较好,可以为分析宏观震害提供参考;通过与尼泊尔设计反应谱对比,得出在短周期与长周期段,加德满都台站的水平向地震动的反应谱远高于设计反应谱,说明即使严格按照尼泊尔建筑抗震规范设计施工的建筑结构也难以抵御此次地震的破坏。
引用
收藏
页码:201 / 210
页数:10
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