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润扬长江大桥钢箱梁的温度分布监测与分析

, PP. 94-98

Keywords: 桥梁工程,结构健康监测,温度分布,观测,悬索桥,斜拉桥,钢箱梁

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Abstract:

基于润扬长江大桥斜拉桥和悬索桥钢箱梁的温度观测结果,研究了扁平钢箱梁在日照作用下的温度分布特征,比较了悬索桥和斜拉桥2种桥型钢箱梁温度场的差异。实测结果表明(1)钢箱梁顶板的昼夜温差明显大于底板的昼夜温差,且悬索桥钢箱梁的昼夜温差较斜拉桥更为明显;(2)钢箱梁底板的横向温度分布基本相同,可以不计横向温差影响;(3)钢箱梁顶板的横向温差表现为非线性时变特征,且斜拉桥和悬索桥钢箱梁的顶板温度分布模式存在明显的差异。润扬长江大桥扁平钢箱梁的温度分布模式为扁平钢箱梁在日照温差作用下的结构计算和桥面铺装层计算提供了重要参考。

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