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温差对大跨度拱桥成拱状态影响分析

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Keywords: 合龙温差,大跨度拱桥,线形,应力,承载力,closuretemperaturedifference,longspanarchbridge,figure,stress,carryingcapacity

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Abstract:

:?针对大跨度拱桥合龙温差的问题,以新龙门大桥工程为依托,借助ANSYS有限元程序建立分析模型,开展了合龙温差对大跨度拱桥成拱线形、应力及承载力影响的分析。结果表明:合龙温差对合龙段线形、上弦杆拱脚截面应力、下弦杆拱顶截面应力都有显著影响。当合龙温差大于22℃时,为保证成拱线形及应力处于合理范围内,需要在合龙前采取调整措施。

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