基于率性损伤模型的混凝土重力坝地震响应分析

英文篇名：Seismic response analysis of concrete gravity dam based on strain rate-dependant damage model
中文刊名：哈尔滨工业大学学报
英文刊名：Journal of Harbin Institute of Technology
作者：陈健云 ; 李静 ; 林皋
英文作者：CHEN Jian-yun ; LI Jing ; LIN Gao(School of Civil and Hydraulic Engineering ; Dalian University of Technology ; Dalian 116024 ; China ; )
中文关键词：应变率 ; 非线性损伤模型 ; 混凝土 ; 动力分析 ; 本构关系
英文关键词：strain rate-dependant ; nonlinear damage constitutive model ; concrete ; dynamic analysis ; dam
出版日期：2005-06-30
机构：大连理工大学土木水利学院,大连理工大学土木水利学院,大连理工大学土木水利学院辽宁大连116024 ,辽宁大连116024 ,辽宁大连116024
年：2005
期：06
出版单位：哈尔滨工业大学学报

摘要

为研究混凝土材料动态力学特性与应变率的关系,引入损伤张量随应变率的变化建立了应变率相关的砼非线性损伤模型,并对一混凝土重力坝的地震响应进行了分析.结果表明,在地震过程中的混凝土应变率变化使得结构各处的强度和刚度提高的程度不同,对结构控制部位的响应和安全性评价有重要影响.
A strain rate-dependant damage constitutive model for concrete is presented with rate-dependant damage variables based on the experimental results, which can simulate different behavior under tensile and compressive loading. The proposed model is applied to the seismic response analysis of a concrete gravity dam and then the results are compared with that obtained by rate-independent model. It is shown that the variation of concrete strain-rate make the limit strength and stiffness increase to different extent at different part and have significant effects on the structural dynamic response and safety evaluation.

引文

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