东江特大桥动力响应特性测试与分析
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摘要
通过无障碍行车(跑车)试验和有障碍(跳车)试验,评价东江大桥的动力响应特性。实验结果表明,结构各部位反应平稳,无任何异常现象发生,实桥结构的动力性能良好。对比分析了不同试验工况的冲击系数和应变增大系数。结果表明,车辆对大桥的冲击系数因位置和速度而异;应变增大系数则与车速成反比。
Through the barrier-free driving test and obstacles test the dynamic response characteristics of Dongjiang bridge is evaluated.The experimental results show that the various parts of structural response is smooth,without any abnormal phenomenon.Tt means the dynamic performance of Dongjiang bridge is really good.The impact factor and the strain magnification factor in different experimental conditions,are Comparatied and analysed The results show that the vehicles on the bridge's impact factor varies by position and velocity;strain magnification factor is inversely proportional with the speed.
Through the barrier-free driving test and obstacles test the dynamic response characteristics of Dongjiang bridge is evaluated.The experimental results show that the various parts of structural response is smooth,without any abnormal phenomenon.Tt means the dynamic performance of Dongjiang bridge is really good.The impact factor and the strain magnification factor in different experimental conditions,are Comparatied and analysed The results show that the vehicles on the bridge's impact factor varies by position and velocity;strain magnification factor is inversely proportional with the speed.
引文
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2严志刚,盛洪飞,陈彦江.桥面平整度对大跨度钢管混凝土拱桥车辆振动的影响.中国公路学报,2004;4(17):41—44
3张俊平,李新平,周福霖.桥梁结构振动控制发展及存在的问题.世界地震工程,1998;14(2):9—16
4铁路桥梁检定规范.北京:中国铁道出版社,2004
5刘菊玫,张海龙,桥梁冲击系数反应谱的理论分析.公路,2001;7(3):77—80
6李国豪,项海帆,沈祖炎,等.桥梁接否稳定与振动.北京:中国铁道出版社,1992
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