| 强震动作用下土体非线性动力特征研究发展与展望 |
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| 引用本文： | 王玉石,李小军,兰日清,王宁,陈红娟.强震动作用下土体非线性动力特征研究发展与展望[J].震灾防御技术,2016,11(3):480-492. |
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| 作者姓名： | 王玉石 李小军 兰日清 王宁 陈红娟 |
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| 作者单位： | 中国地震局地球物理研究所，北京 100081,中国地震局地球物理研究所，北京 100081;北京工业大学建筑工程学院，北京 100124,中国地震局地球物理研究所，北京 100081,中国地震局地球物理研究所，北京 100081,中国地震局地球物理研究所，北京 100081 |
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| 基金项目： | 地震行业科研专项（201408020）、国家自然科学基金（51578514，U1434210）资助 |
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| 摘 要： | 浅地表覆盖土层动力特性对地震动影响显著,软厚土层会明显改变地震动强度及频谱特性。由于观测数据匮乏,强震动作用下土体非线性动力特征研究长期以来均以室内试验为主,但在实验室中难以可靠地模拟实际地震历程中土体承受的加载路径、边界条件、排水条件等复杂因素。近二十年来竖向台阵(至少包含一个地表测点和一个井下基岩测点)记录数据大量增加,为土体非线性动力学研究提供了新的基础数据与发展机遇,使基于现场观测的土体非线性动力特征实证研究成为可能。
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| 关 键 词： | 强震动 土动力学 局部场地效应 强震动观测 竖向台阵记录 |
| 收稿时间： | 2015/10/28 0:00:00 |
Development and Prospect of Study on Soil Nonlinear Dynamic Characteristics under Strong-Motion |
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| Wang Yushi,Li Xiaojun,Lan Riqing,Wang Ning and Chen Hongjuan.Development and Prospect of Study on Soil Nonlinear Dynamic Characteristics under Strong-Motion[J].Technology for Earthquake Disaster Prevention,2016,11(3):480-492. |
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| Authors: | Wang Yushi Li Xiaojun Lan Riqing Wang Ning and Chen Hongjuan |
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| Institution: | Institute of Geophysics, China Earthquake Administration, Beijing 100081, China,Institute of Geophysics, China Earthquake Administration, Beijing 100081, China;College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China,Institute of Geophysics, China Earthquake Administration, Beijing 100081, China,Institute of Geophysics, China Earthquake Administration, Beijing 100081, China and Institute of Geophysics, China Earthquake Administration, Beijing 100081, China |
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| Abstract: | Ground motions are significantly influenced by dynamic characteristics of covering soil layers near ground surface, as thick and soft soil layers would obviously amplify the ground motion strength. The conventional research method on soil nonlinear dynamic characteristics under strong motions is based on experiments in laboratories for the deficiency of observation data, but it is difficult to reliably simulate the complex factors of soils in actual earthquake durations, including loading paths, boundary conditions, and drainage conditions. The incremental data of the vertical downhole observation array, which is comprised of at least one observation point on ground surface and one observation point in downhole rockbase, makes it possible to study soil nonlinear dynamics according to in situ observation data, and provides new basic data and development opportunities to soil nonlinear dynamics studies. |
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| Keywords: | Strong-motion Soil dynamics Local site effect Strong-motion observation Vertical array record |
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