深圳市某钢桥桥面铺装层温度场有限元模拟研究

Research on Temperature Field of Steel Bridge Deck Pavement Course by Finite Element Simulation in Shenzhen

该文针对钢桥桥面铺装层早期破坏这一世界性难题,根据气象部门提供气象资料,钢桥桥面铺装材料热物性参数实测值,利用有限元手段,对深圳市某钢桥桥面铺装层温度场进行了模拟计算。结果表明:钢桥桥面铺装层具有较高的温度,高温作用时间长,温度波动大,正负梯度转化快,不同深度处,最高温度的温度滞后现象不明显等特征。相比路面温度场,钢桥桥面铺装层的温度场变化更为剧烈,温度条件更为苛刻。因此,在钢桥桥面铺装设计中,铺装层的温度问题应当引起足够重视。

Aiming at the early damage of steel bridge deck pavement course being a difficulty in the world,based on the meteorological data provided by the weather department and the measured value of thermodynamic parameter of steel bridge deck pavement material,using the finite element means,the article simulatively calculates the temperature field of deck pavement course of a steel bridge in Shenzhen.The result makes clear that the steel bridge deck pavement course has the characters of the higher temperature,the long high-temperature duration,the large temperature fluctuation,the fast changing of the positive and negative gradients,and the unobvious temperature lagging phenomenon of the highest temperature at the different depths.Compared with the temperature field of the pavement,the temperature field of steel bridge deck pavement course is changed more fiercely and the temperature condition is harsher.Therefore,more attentions are paid for the temperature problem of pavement course in the design of steel bridge deck pavement.