基于单处铰缝破坏的装配式空心板桥横向分布系数研究

Study on Transverse Distribution Coefficient of Slab Assembly Type Hollow Single Hinge Based on Joint Destruction

空心板梁的铰缝损伤现象十分普遍。为得到车辆荷载作用下铰缝损伤的分布长度及铰缝损伤分布位置对荷载横向分布系数的影响趋势,对一座预应力装配式空心板桥建立梁格法模型模拟车辆荷载工况下的空心板最不利受力情况进行研究。结果表明:铰缝损伤的分布长度和分布位置对空心板桥荷载横向分布的影响存在显著不同,铰缝损伤造成的桥梁局部刚度和约束降低,极大地影响着桥梁结构的荷载横向分布系数。

The phenomenon of joint crack is very common.In order to get the influence of the distribution length of the joint damage and the damage location of the hinge on the transverse distribution coefficient of the load,In this paper,through the establishment of grillage method model of a prestressed prefabricated hollow slab bridge,the most unfavorable stress situation of the hollow slab was simulated under the condition of vehicle load.The results showed that the distribution length and location of the hinge joint damage had different effects on the lateral load distribution of the hollow slab bridge,the joint stiffness and the lower bound caused by the bridge damage,greatly affects the transverse load distribution coefficient of bridge structure.