基于地震反应谱分析的全直桩码头结构优化  

Structural design optimization of all-vertical-piled wharf based on seismic response spectrum analysis

作　　者：汪雨 孙克俐[1] WANG Yu;SUN Keli(School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学建筑工程学院,天津300350

出　　处：《合肥工业大学学报（自然科学版）》2021年第9期1221-1226,1236,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(51879187)。

摘　　要：文章建立了参数化全直桩码头空间有限元模型,通过振型分解反应谱法分析了该结构在水平地震作用下的响应,在此基础上构建了合理的码头抗震优化设计数学模型,通过灵敏度分析和零阶算法进行求解,得到了满足抗震设计要求且单位面积码头所需材料最少的设计序列;同时探讨了不同位置底梁对于全直桩码头结构抗震性能的影响。仿真结果表明:采用整体布局优化和增设底梁相结合的方法对全直桩码头结构进行抗震优化设计是可行的;底梁布设可有效限制结构变形、减小桩基内力,从而提高结构的抗震性能。In this paper,a parametric finite element model of all-vertical-piled wharf is established,and the response of such a structure under horizontal earthquake effect is studied through the vibration mode decomposition response spectrum.On this basis,a reasonable mathematical model for aseismatic optimization design based on such a structure is established.Through sensitivity analysis and sub-problem approximation method,the design sequence that meets the aseismatic design requirements and requires the least materials per unit area of wharf is obtained.At the same time,the influence of bottom beams at different positions on the aseismatic performance of all-vertical-piled wharf is discussed.The results show that it is feasible to carry out aseismatic optimization design of all-vertical-piled wharf by combining integral layout optimization and adding bottom beam.The arrangement of bottom beam can effectively limit the structural deformation and reduce the internal force of piles,thus improving the aseismatic performance of the structure.

关 键 词：全直桩码头 振型分解反应谱法 地震响应 优化设计 抗震设计 底梁 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]