高桩码头承载性能的影响因素研究  

Studies on factors affecting the bearing performance of high-pile wharf

作　　者：吕鹏 焉振[2] 董胜[1] LYU Peng;YAN Zhen;DONG Sheng(College of Engineering,Ocean University of China,Qingdao 266100,China;Tianjin Research Institute for Water Transport Engineering,Tianjin 300456,China)

机构地区：[1]中国海洋大学工程学院,山东青岛266100 [2]交通运输部天津水运工程科学研究所,天津300456

出　　处：《海洋湖沼通报》2023年第6期43-50,共8页Transactions of Oceanology and Limnology

基　　金：国家自然科学基金委员会-山东省人民政府联合基金项目(U1706226);国家自然科学基金项目(51809132)。

摘　　要：高桩码头的承载性能除了受结构及材料的影响外,土体强度及桩土之间的摩擦也对其具有重要影响。本文基于ABAQUS建立了高桩码头三维有限元模型,并在验证模型正确性的基础上分析了土体强度、弹性模量以及桩-土摩擦系数对结构承载性能的影响。结果表明:土体强度与弹性模量均对结构的极限承载力具有一定的影响,在相同水平荷载作用下,土体强度与弹性模量越大,结构的水平位移越小,所受弯矩越小。而土体强度对最大负弯矩影响较小,最大差值出现在距桩底1/4处,弹性模量对最大正弯矩与负弯矩都有影响,最大弯矩变化大约为10%~15%。桩-土摩擦系数μ同样对结构的承载性能具有一定影响,在一定范围内,随着μ的增加,结构的极限承载力也呈现逐渐增大的态势,并且其变化幅度也逐渐增加,但摩擦系数对弯矩的影响主要集中在负弯矩处,对受正弯矩作用部分影响较小。In addition to the influence of structure and material on the bearing performance of high-piled wharf,the strength of soil and the friction between pile and soil also have important influences on such performance.In the study,a three-dimensional finite element model of a high-piled wharf was established based on ABAQUS and compared with the testing results.The numerical simulation showed a good agreement with those revealed by the physical experiments.On this basis,the influences of soil strength,elastic modulus and pile-soil friction coefficient on the structural bearing performance were analyzed.The results showed that both soil strength and elastic modulus have a certain effect on the ultimate bearing capacity of the structure.Under the same horizontal load,the greater the soil strength and elastic modulus,the smaller the horizontal displacement of the structure and the smaller the bending moment.The soil strength has little effect on the maximum negative bending distance.The maximum difference appeared at 1/4 from the bottom of the pile.The elastic modulus affected both the maximum positive and negative bending moments,and the maximum bending moment change was 10%~15%.The pile-soil friction coefficient also had a certain influence on the bearing performance of the structure.Within a certain range,with the increase of μ,the ultimate bearing capacity of the structure increased gradually,and its variation range increased gradually also.However,the influence of the friction coefficient on the bending moment was mainly concentrated at the negative bending moment,and had little effect on the part affected by the positive bending moment.

关 键 词：高桩码头 地基土体 位移 弯矩 有限元 

分 类 号：U656.113[交通运输工程—港口、海岸及近海工程]