玻璃钢/钢材复合结构舟桥模型试验研究

EXPERIMENTAL STUDY ON CENTER PONTOON MODELS WITH FRP/STEEL COMPOSITE STRUCTURE

本文采用玻璃钢/钢材复合结构形式的4折带式舟桥模型为试验对象,对每两个方舟模型互相连接后进行竖向加载试验。试验结果与根据结构相似理论得出的结果相比较表明,模型受力性能较稳定,能承受最大荷载与理论计算的结果较吻合。玻璃钢壳板与钢质构件之间应力分配较为合理,玻璃钢壳板的受载情况良好,能承受较大荷载。但玻璃钢壳板的挠度值偏大,特别是甲板面需要考虑采取适当措施来加强。

Four ribbon pontoon bridge models are taken as experimental objects, which were made with FRP/ steel composite structure. The load tests are arraigned to each two center pontoon models after they are linked with each other. The maximum load that the models can bear in the test meets the design load according to the structural similar theory. The stress distribution between FRP shells and steel members shows that FRP shells play well in the test and can bear much load. Research results show that pontoon bridge models with FRP/steel composite structure are good in static characteristics except the FRP shell deformation is a little high. The deck especially needs to be strengthened through some measurements.