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伸缩缝变化参数对简支梁桥–连续梁桥车致动力响应影响实测研究
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Abstract:
本文通过现场实测探究了伸缩缝参数对简支梁桥、连续梁桥车致动力响应的影响。实测结果表明，伸缩缝变化参数对车致桥梁动力响应显著，车辆过缝会造成车辆对桥梁局部冲击作用增大，且该局部冲击作用随测点与伸缩缝距离的减小而增加。伸缩缝高差(横梁两侧、中横梁与边横梁间)会增大车辆对简支梁桥、连续梁桥梁端的车辆冲击作用。
This study investigated the vehicle-bridge coupling dynamic response of a simply supported beam bridge and a continuous beam bridge considering the impact of expansion joint’s parameters through field testing. The results show that the parameters variation of expansion joint has significant effect on the vehicle-bridge coupling dynamic response. The local impact response of the bridge induced by vehicle will increase when the vehicle passes through the expansion joint. Moreover, the peak value of the above local impact effect will decrease with the increase of the distance between the testing point and the expansion joint. In addition, the height difference between the two side beams or between the side beam and the center beam of the expansion joint will increase the impact effect of the vehicle on the simply supported beam bridge and the continuous beam bridge.
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