大型沉箱码头地震作用的非线性动力反应

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英文篇名：Nonlinear dynamic response of large-size caisson in the earthquake 中文刊名：水运工程 英文刊名：Port & Waterway Engineering 作者：王松 ; 喻泽红 英文作者：WANG Song1 ; YU Ze-hong2(School of Water Conservancy ; Changsha University of Science and Technology ; Changsha 410076 ; China) 中文关键词：反应谱法 ; 地震动力响应 ; 时程分析法 ; 人工边界 ; 填土震陷 英文关键词：response spectrum method ; seismic dynamic response ; time history analysis ; artificial boundary ; seismic subsidence of backfilled sand 出版日期：2010-08-25 机构：长沙理工大学水利学院; 年：2010 期：08 出版单位：水运工程

摘要

大量的沉箱码头在地震中沉降和向海侧倾倒,后方填土遭到严重大面积震陷破坏,致使沉箱岸壁处产生残余裂缝,在沉箱码头及填土地基的整体模型体系中出现了明显的弹塑性。运用动力有限元计算分析沉箱及其后方填土在地震下的动力反应,分析了地震过程中沉箱与水体、后方填土及地基的相互作用,得出沉箱及其周围土体应力、应变的变化情况、码头后方填土震陷及沉箱整体变形失稳趋势,计算结果与地震实测结果基本一致。
Many caisson-quay walls settle in the earthquake and dump towards the sea.The backfilled sand in the earthquake suffers severe large acreage subsidence,which generates residual cracks in caisson quay wall.In the model system,the plasticity appeared in the caisson dock and backfilled sand.By using finite element calculation,we analyze the dynamic response of the caisson and its backfilled sand,study the interactions among the caisson,water,the backfilled sand and foundation,and achieve results concerning the seismic process changes of stress and strain of soil,the caissons′ overall instability trend,and the collapse of soil behind the caisson.The calculation results and measured data are basically the same.

引文

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