温度-荷载作用下钢桥面铺装层间黏结性能分析

Analysis on Interlayer Bonding Performance of Steel Bridge Deck Pavements under Temperature-Load Action

摘要:

钢桥面铺装结构中，层间黏结性能是桥面板和铺装层协同受力和变形的关键因素。为分析温度-荷载耦合作用下钢桥面铺装层间黏结性能的响应规律，建立了基于内聚力模型的钢桥面铺装三维有限元仿真模型，耦合温度场计算对各影响因素进行正交分析，结果表明：层间接触状态、温度和垂直荷载为层间剪应力和损伤起始系数的主要影响因素，设计和管理过程中应重点关注高温重载路段的层间黏结性能；随抗剪强度衰减，损伤起始系数加速增大，工程中应重点警惕层间黏结性能衰减，尤其是层间抗剪强度和位移参数的同步脆性衰减，断裂能下降更快，局部损伤更易发生并扩展。

Abstract:

In the steel bridge deck pavement structure, the interlayer bonding performance is a key factor for the coordinated force and deformation of the bridge deck and the pavement layer. To analyze the response rule of interlayer bonding characteristics of steel deck pavement under the temperature-load coupled action, a three-dimensional finite element simulation model of the steel bridge deck pavement based on a cohesion model is established. The orthogonal analysis of each influencing factor is conducted by coupling the temperature field calculation. The results indicate that the interlayer contact condition, temperature and vertical load are the main influencing factors of interlayer shear stress and damage initiation coefficient. In the design and management process, the particular attention should be paid to the interlayer bonding performance of high-temperature and heavy-load sections. With the attenuation of shear strength, the damage initiation coefficient increases at an accelerated rate. In engineering, the particular attention should be paid to the attenuation of interlayer bonding performance, especially the synchronous brittle attenuation of interlayer shear strength and displacement parameters. The fracture energy drops more rapidly, and the local damage is more likely to occur and spread.