大跨径钢桥桥道系协同作用试验模型研究

Study on the synergistic experimental model of long-span steel bridge deck-pavement system

建立了考虑整桥变形的局部梁段模型,对钢桥面铺装在整桥及车载作用下的应力进行了计算,得到整桥变形的影响系数为1.17。建立初拟的两种协同作用试验方案的有限元模型,以局部梁段模型中铺装的最大应力应变值为参考值,对两种协同作用试验方案中相关结构参数进行了修正;在此基础上,为保证设计的协同作用试验模型与原型的一致性,将修正后的试验模型与局部梁段模型在控制点位应力值进行了对比;最终得到大跨径钢桥桥道系协同作用试验模型。研究成果可为钢桥面铺装室内试验模型的设计提供理论依据。

In order to reflect the synergistic effect and working environment of the long-span steel bridge deck-pavement system truly in laboratory experiments, this paper studies the synergistic experimental model of flexi- ble long-span steel bridge deck-pavement system. Firstly, the local box girder FEM （finite element method） model considering the whole bridge deformation is established. And the deck pavement＇ s stress and strain are analyzed. The entire bridge effect parameter is 1. 17. Then, the synergistic experimental model is established. Taking the maximum stress and strain value of local beam section as reference value, the related structure parameters of early model scheme are revised. On this basis, to ensure the consistency of designing for the synergy model and the pro- totype, stress value of the revised test model and local beam section model in the control point is compared. Eventually, the synergistic experimental model of long-span steel bridge deck-pavement system is obtained in this paper. The results may provide theoretical basis for designing of laboratory experiment model on steel bridge deck.