无梁板式高桩码头温度效应分析

气温的年变化会引起结构内温度的均匀变化,从而使得结构内部产生变形和内力,在高桩码头工程中温度作用往往会引起不利影响。为了研究无梁板式高桩码头的温度效应,基于无限板的热传导规律,以工程实例为依托,利用有限元软件ABAQUS建立三维模型。结合杭州地区的逐时气象资料,研究了气温变化特征、面板温差场以及结构变形与位移的变化规律,并对基本气温的选取进行讨论。结果表明:气温在无梁面板中呈现以厚度方向为主的一维传热特征,温度场在水平向分布均匀;气温年变幅在面板内几无衰减,日变幅对面板温度影响不可忽略;面板的整体温差与竣工时气温和年平均气温差,以及年变幅、日变幅的衰减值有关;无梁板码头基桩的温度响应受面板的整体温差控制,两者瞬时同步变化。

Analysis of temperature effect on beamless-slab high-piled wharf

The annual variation of temperature will cause the uniform change of temperature in the structure,which will cause the deformation and internal force in the structure,and the effect of temperature will often cause adverse influence in high-piled wharf projects.In order to analyze the temperature effect of beamless-slab high-piled wharf,on account of the heat conduction law of infinite slab,we establish the finite mesh model with ABAQUS based on the real engineering projects.Based on the hourly meteorological data in Hangzhou,the variation characteristics of temperature,the temperature difference field of slab,the structural deformation and displacement were studied,and the selection of basic temperature was discussed.The results show that air temperature presents one-dimensional heat transfer characteristics mainly in thickness direction in beamless slab and temperature field is uniformly distributed in horizontal direction.The annual variation of air temperature hardly attenuates in the panel,and the influence of daily variation on the panel temperature can not be neglected.Temperature response of foundation piles of beamless-slab wharf is controlled by the overall temperature difference of the slab,and the two changes are simultaneous.