深厚覆盖层上水闸结构-地基体系动力反应特性研究  

Seismic response analysis of sluice structure-soil system with deep soil deposit

作　　者：邸庆霜[1] 胡晓[1] 邢义川[2] 曾迪[1] 

机构地区：[1]中国水利水电科学研究院工程抗震研究中心,北京100048 [2]中国水利水电科学研究院研究生部,北京100048

出　　处：《中国水利水电科学研究院学报》2015年第5期321-326,共6页Journal of China Institute of Water Resources and Hydropower Research

基　　金：中国水利水电科学研究院青年科技专项(抗集1306)

摘　　要：高抗震设防烈度区的水闸工程,需要采用动力设计方法进行结构设计。对于建于深厚覆盖层地基之上的大多数水闸结构,本文采用等效线性化方法,在总体动力学效应大致相当的意义上,将水闸结构-地基体系中土体非线性问题转换为线性问题进行求解。以某水闸工程为例开展对比分析研究,发现:(1)相对于弹性地基模型,考虑地基土非线性的等效线性化方法可以获得更为合理的水闸结构动力反应;(2)上部机架桥部分的动力反应要比闸墩部分高,在水闸设计过程中应当强化上部机架桥部分的结构设计;(3)对于考虑深厚覆盖层的水闸抗震问题,应当更加深入研究长周期地震动输入的影响;(4)等效线性化方法是考虑了地基土非线性动力特性,工程基础数据及经验较为丰富,也便于扩展为考虑滞回特性的完全动力非线性求解方法。Dynamic analysis method is needed for high seismic demand of sluice structures. Usually,sluicestructures were commonly built on the soil layer with deep deposit. For the reason of complexity of suchproblems and engineering practices,the equivalent linear method was adopted in the dynamic response anal-ysis of sluice structure-soil deposit system. On the statistic equivalent concept,the nonlinearity of soil mate-rial was addressed with linear solution method,so the problem was simplified. Concluding from a sluicestructure analysis,that（1） comparing to the normal elastic solution,rational results can be obtained byequivalent linear method which considering nonlinearity of foundation soil,（2） the response of upper framewas bigger than the sluice pier,which need much more concern in the structure design,（3） when consid-ering deep deposit soil layers,the effects of seismic inputs with long periods should be more concerned,（4） equivalent linear method take considering nonlinearity of soils by statistical equivalent method, withmany engineering test data and experiences,it also convenient to expand to true nonlinear material modelmethod.

关 键 词：水闸 土-结构动力相互作用 深厚覆盖层 土体动力本构 等效线性化方法 

分 类 号：TV312[水利工程—水工结构工程]