多跨矮塔斜拉桥静载试验研究

On Static Load Test of Multi-span Cable-stayed Bridge with Low Towers

矮塔斜拉桥是介于连续梁和传统大跨度斜拉桥之间的一种斜拉组合体系桥梁,具有矮塔、梁体刚度大、斜拉索集中的特点,其同时集中了斜拉桥的造型优美、跨度大和连续梁刚度大的优点[1-2]。通过该类桥型的静载试验,可以验证其在该受力体系下,各结构构件受力是否与理论设计一致,其应力应变及位移能否满足相应设计荷载下的要求,可以为该类桥梁的相关设计及静载试验提供依据。

Low-pylon cable-stayed bridge is a kind of cable-stayed composite system bridge between continuous beams and traditional long-span cable-stayed bridges. It has the characteristics of low tower, large stiffness of beam body and concentrated cable-stayed cable. At the same time, it concentrates the advantages of beautiful shape, large span and large stiffness of continuous beam of cable-stayed bridges. Through the static load test of this type of bridge, it can verify whether the stress of each structural member is consistent with the theoretical design, and whether the corresponding stress, strain and displacement can meet the requirements of the corresponding design load, which can provide the basis for the relevant design and static load test of this type of bridge.