浮桥大位移理论计算方法研究及与动态测试结果的比较分析

为了研究浮桥在重载通过时的大位移变形,把浮桥简化成弹性基础梁,对浮桥在荷载作用下的动力响应进行了建模和计算。对浮桥在静态下的位移、单荷载和2车车队下的动态响应进行了计算,并与相应条件下的动态测试结果进行了比较分析。通过计算与试验的对比分析得出:利用弹性基础梁的理论计算结果,可以满足工程的精度要求,而且计算简便易行,能快速计算各个工况下浮桥的动力响应和位移大小。

ANALYTICAL METHOD FOR FLOATING BRIDGE BASED ON LARGE DISPLACEMENT THEORY AND COMPARISON THE RESULTS WITH EXPERIMENTAL DATA OF DYNAMIC TESTS

In order to estimate the vertical displacements of a floating bridge subjected to moving heavy loads, the floating bridge is simplified as an elastic-base-beam, and then the dynamic response is solved accordingly. The static vertical displacements and the dynamic responses induced by a single moving load or two moving loads are calculated and compared with those obtained by dynamic displacement tests under the same conditions. It is shown that the calculated results by the proposed method can satisfy the precision requirement in engineering. Moreover, the method can be performed conveniently for the estimation of dynamic responses and vertical displacements of the floating bridge in different cases.