Effect of Solar Radiation on Suspension Bridge Performance
Effect of Solar Radiation on Suspension Bridge Performance
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DOI：
10.1061/(asce)be.1943-5592.0000668
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发表时间：
2015-05
影响因子：
3.6
通讯作者：
R. Westgate;K. Koo;J. Brownjohn
中科院分区：
文献类型：
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作者：
R. Westgate;K. Koo;J. Brownjohn
AbstractObservations of a UK.悬索桥表明，热膨胀和收缩循环与单一温度值并不遵循简单线性关系，时间滞后和温度分布可能是重要因素。这项研究探讨了这些影响，通过模拟瞬态热和准静态响应的添马舰大桥与独立的有限元模型的桥梁和悬索。热负荷由计算的太阳辐射强度和桥梁监测系统的温度数据确定。由于云量在太阳辐射水平中起着重要的作用，因此使用监测到的悬挂结构顶部和底部之间的温差间接估计云量。结果表明，悬索结构和拉索的峰值温度出现在不同的时间。这种滞后是由不同的材料特性和表面吸收和损失热量的能力造成的。瞬态现象分析仪
AbstractObservations of a U.K. suspension bridge show that thermal expansion and contraction cycles do not follow simple linear relationships with a single temperature value and that time lag and temperature distribution can be significant factors. This investigation explores these effects by simulating the transient thermal and quasistatic response of the Tamar Bridge with separate finite-element models of the bridge and suspension cables. Thermal loads are determined by calculated solar radiation intensities and temperature data from the bridge monitoring system. Because cloud cover plays an important role in the levels of solar radiation, cloud coverage was estimated indirectly using monitored temperature differences between the top and bottom of the suspended structure. The results demonstrate that peak temperatures of the suspended structure and cables occur at different times. The lag is caused by differing material properties and the surfaces’ ability to absorb and lose heat. Transient phenomena ma...