项目名称: 场地条件对地震波传播影响研究的若干问题
项目编号: No.51278323
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: 丁海平
作者单位: 苏州科技学院
项目金额: 80万元
中文摘要: 确定地表地震动参数需要考虑场地的影响,本项目旨在对目前实际工程应用中采用的土层地震响应分析的思路和方法进行评价,指出不同方法中计算模型的建立、介质参数的选取和分析手段的异同和矛盾,解释不同方法的计算结果不一致的原因,提出解决这些问题的方法,从而保证各种方法的计算结果一致性和合理性。在此基础上,根据数值模拟结果,统计地形变化程度、场地类别、输入地震动强度与场地地表放大因子之间的关系;同时,对三维复杂场地的地震响应分析,特别是其中的不规则人工边界的处理提出计算方法。进一步提高研究场地条件对地震影响的能力和水平,为结构抗震分析提供更合理的地震动输入。
中文关键词: 场地条件;强地震动;数值模拟;计算方法;场地效应
英文摘要: In this item, the ideas and methods of seismic response analysis for soil usually applied in engineering will be evaluated. The differences and contradictions of model establishment, medium parameters selection and analytical techniques in different methods will be pointed out. And the reasons for the inconsistent results in different methods will be explained. In order to ensuring the consistency and rationality of calculation results in various methods, some ideas and medhods will be proposed in this item. On this basis,the relationship between the amplification factors of surface displacement and the degree of topography variation,the site classification or the input intensity of ground motion will be calculated and statistics. At the same time, the simulation method of artificial boundary for three-dimensional complex site with irregular topographic changing will be put forward. Finally the more reasonable earthquake input for seismic analysis of structures will be supplied.
英文关键词: field condition;strong ground motion;numerical simulation;calculation method;field effection