地震波与液化土层特征关联性及相互作用规律研究

项目名称： 地震波与液化土层特征关联性及相互作用规律研究

项目编号： No.51278472

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 建筑科学

项目作者： 孙锐

作者单位： 中国地震局工程力学研究所

项目金额： 80万元

中文摘要： 土体中波传播问题是强地震学和工程地震学的重要研究内容。土层液化对地表地震波影响以及从地表地震波识别液化是工程上新近提出需要解决的课题，分属于波正反演问题，目前均处在局限于表面现象粗浅认识阶段，理论基础匮乏，而解决这两方面问题的关键均在于地震波与液化层特征关联性的认识及二者相互作用规律的掌握。本项目从地震波-液化层关联性及相互作用角度统一考虑，采用现场资料分析、室内实验和计算分析等多种手段，研究各类土层地表地震记录时变过程，提炼液化层存在下地表地震波特征，提出地震波特征液化影响阈值；建立土层液化影响理论计算模型，获取土层性能特征，提出土层性能特征液化影响阈值；研究液化层存在下地表地震波特征量与土层特征量的关联性，建立不同条件下两类特征量变化的关系曲线，掌握地震波与液化土层相互作用的基本规律。本研究可发展复杂土层中波传播理论，并为解决液化层对地震波影响以及从地震波反演识别液化问题提供基础。

中文关键词： 液化；地震动；相互作用；；

英文摘要： Wave propagation in soil medium is an important scientific subject in strong motion seismology and engineering seismology. The influence of soil liquefaction on ground motion and liquefaction detection techniques based on ground motion records, which, respectively, belong to direct and inverse problems, are new proposals which need to be solved in engineering practice. Presently, the acquaintance and understanding of the problems are quite superficial as well as limited theoretical background. The keys to solve the problems depend on understanding the correlation of seismic wave and liquefied soil characteristics, meanwhile, and their interacting rules. In this project proposal, in-situ investigation documents analysis, laboratory testing and theoretical calculation are comprehensively used methods, in terms of correlation of seismic wave and liquefiable soil along with their interacting rules, to study the time variation process of ground motion records. Thereafter, the characteristics and seismic wave can be collected and furthermore their liquefaction influenced threshold values will be proposed. By establishing a liquefaction influenced theoretical model, soil property characteristics can be obtained and their liquefaction influenced threshold values will be proposed. The correlation of the characteristics o

英文关键词： liquefaction；ground motion；interaction；；