摘要
为研究全直桩高桩码头的地震易损性问题,以某全直桩高桩码头为工程背景,考虑场地和地震动特性的不确定性影响,借助岩土有限元软件Midas GTSNX,建立全直桩高桩码头-地基土相互作用非线性数值模型.将地基土内最大桩基应变作为破坏损伤指标,基于增量动力分析法对所选地震动进行调幅,并逐一进行数值计算,得到全直桩高桩码头的地震易损性曲线,分析了全直桩高桩码头在不同强度地震动作用下不同破坏状态的超越概率.研究结果表明,当地面峰值加速度<0.80g时,全直桩高桩码头结构的破坏状态主要为轻度损伤以及中度损伤;当地面峰值加速度≥0.80g时,发生严重损伤的概率基本超过了50%,码头结构丧失运营能力.以地基土内桩基损伤为指标的易损性分析,描述了地震对全直桩高桩码头结构造成的影响,可为高桩码头的抗震设计和防灾预测提供参考.
In order to study the seismic vulnerability of pile-supported wharf structure,taking a vertical pile-supported wharf as the research object and considering the influence of the site,seismic spectrum characteristics and the uncertainty of ground motion intensity,we establish a dynamic nonlinear numerical model of structure-foundation soil coupling of vertical pile-supported wharf by using the geotechnical finite element software of Midas GTS NX.Selecting the maximum strain of pile foundation in soil as the damage index,we obtain the seismic vulnerability curves and the corresponding damage state probability based on the the incremental dynamic analysis method.The analysis results show that when peak ground acceleration is less than 0.80g,the wharf structure is mainly in mild damage state or moderate damage state,otherwise the probability of serious damage basically exceeds 50%and the structure will lose operational capacity.Based on the vulnerability analysis of pile foundation damage in foundation soil,the influence of earthquake on the vertical pile-supported wharf is described from macroscopic and quantitative point of view,which can provide reference for seismic design and disaster prevention prediction of vertical pile-supported wharf.
作者
吴志浩
崔春义
冷淇程
许民泽
苏健
WU Zhihao;CUI Chunyi;LENG Qicheng;XU Minze;SU Jian(Department of Civil Engineering,Dalian Maritime University,Dalian 116026,Liaoning Province,P.R.China;College of Ocean and Civil Engineering,Dalian Ocean University,Dalian 116023,Liaoning Province,P.R.China)
出处
《深圳大学学报（理工版）》
CAS
CSCD
北大核心
2022年第4期432-439,共8页
Journal of Shenzhen University(Science and Engineering)
基金
国家自然科学基金资助项目(51578100)
辽宁省航运联合基金资助项目(2020-HYLH-48)
“双一流”建设专项资助项目(SSCXXM017)
大连市科技创新基金重点学科重大资助项目(2020JJ25CY016)。
关键词
海洋工程与技术
全直桩高桩码头
增量动力分析
桩基损伤
地震易损性
超越概率
ocean engineering and technology
vertical pile-supported wharf
incremental dynamic analysis
pile foun⁃dation damage
seismic vulnerability
exceedance probability
作者简介
Corresponding author:Professor CUI Chunyi.E-mail:cuichunyi@dlmu.edu.cn;吴志浩(1996-),大连海事大学硕士研究生.研究方向:结构抗振减振.E-mail:wuzhihao1208@163.com。
