大型离岸深水导管架码头结构选型  

Structure selection on large-scale offshore deep water jacket wharf

作　　者：刘文白[1] 冯基芳[1] 

机构地区：[1]上海海事大学海洋环境与工程学院,上海201306

出　　处：《计算机辅助工程》2010年第2期26-31,共6页Computer Aided Engineering

基　　金：上海市教育委员会科研项目(07ZZ99);浙江省科技计划面上项目(2008C23023);上海海事大学重点学科建设项目(A290209002)

摘　　要：为适应港口大型化深水化的发展,实现适用于-20～-30m水深海域的导管架式集装箱码头结构的位移和极限承载力计算分析和选型研究,通过分析结构内力和变形特征,对结构进行层间高度、去掉横撑、增加斜撑横截面厚度(外径或内径不变)和面积(厚度不变且增大半径)等一系列调整,比较分析不同调整方案对结构总体刚度及其极限承载力的影响.结果表明,从上往下增大导管架层间高度有利于提高结构总体刚度;去掉横撑对结构的总体刚度影响不大;在耗钢量相等的情况下,增大截面面积的方案对总体刚度的提高最大,但对极限承载力的提高不及增大截面厚度的方案,建议采用9腿柱导管架、X型斜撑、层高从上往下逐渐增大的结构单元,并采用增加截面厚度、外径不变的方法代替横撑,在耗钢量相等的情况下可提高结构总体刚度和极限承载力.To meet the development of deep water and enlargement of port, and implement the analysis and selection of the displacement and the ultimate bearing capacity for the structure of a jacket container terminal which is applied to the wharf between - 20 m to - 30 m water depth, a series of structural adjustment such as changing layer height, removing cross struts, and increasing the thickness of cross section of batter braces （external diameter unchanged or interior diameter unchanged ） and area （increasing the radius without changing the thickness ） are taken to compare the effect on the overall rigidity and the ultimate bearing capacity by analyzing the internal force and deformation characteristics of the structure. The results indicate that the top-down increasing layer height of jacket platform is conducive to improving the overall rigidity; the overall rigidity is not changed obviously by removing cross struts; under the same consumption of steel, the case of increasing cross section area can achieve largest overall rigidity but it is not conductive to improving the ultimate bearing capacity compared with the case of increasing the cross section thickness. Therefore, the structural unit with nine catheters, X-type batter braces and top-down increasing layer height should be selected and the cross struts is suggested to remove and replaced by increasing the thickness of cross section of batter braces without changing the external diameter to enhance the overall rigidity and the ultimate bearing capacity of the structure under the same consumption of steel.

关 键 词：深水码头 导管架 总体刚度 极限承载力 ABAQUS 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]