Numerical modelling for temperature distribution in steel bridges
Numerical modelling for temperature distribution in steel bridges
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DOI：
10.1016/s0045-7949(00)00161-9
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发表时间：
2001-02
影响因子：
4.7
通讯作者：
M. Tong;L. Tham;F. Au;P.K.K. Lee
中科院分区：
文献类型：
--
作者：
M. Tong;L. Tham;F. Au;P.K.K. Lee
在太阳辐射、每日气温变化和风速的综合影响下，钢桥可能会发生显着的温度变化。在某些情况下，这些温度变化会引起与静载荷和活载荷引起的应力相当的热应力。由于钢具有高导电性，桥梁通常更容易响应环境条件的变化。因此，研究钢桥的热行为具有重要意义。本文描述了为分析钢桥温度分布而开发的数值模型，并将计算结果与按比例模型获得的结果进行了比较。进行了敏感性分析来研究各种参数对温度分布的影响。此外，如果输入参数不可用，还建议使用最小二乘法来反算输入参数的最佳值。
Steel bridges may undergo significant temperature changes under the combined influence of solar radiation, daily air temperature variation and wind speed. In some circumstances, these temperature changes can induce thermal stresses that are comparable to the stresses induced by dead and live loads. As steel has a high conductivity, the bridges usually respond to the change of environmental conditions more readily. Therefore, an investigation of the thermal behaviour of steel bridges is important. This paper describes a numerical model developed for the analysis of temperature distribution in steel bridges and the computed results are compared with those obtained from scaled models. Sensitivity analysis has been carried out to study the effects of various parameters on the temperature distribution. In addition, a least square method is also suggested for backfiguring best values for the input parameters, if they are not available.