Abstract The performance of a long-span bridge under strong wind and traffic loads is of great importance to ensure the functionality and the serviceability of the bridge as well as the safety of running vehicles. In this paper, an innovative wind-traffic-bridge (WTB) interaction model for predicting the dynamic performance of the long-span bridge and running vehicles under the crosswind is proposed, considering realistic traffic behavior and vehicle inertia force. In this regard, the LAI-E traffic simulation model aiming to faithfully reproduce realistic traffic flow is developed by integrating the kinetics theory, vehicle capabilities, and driver reactions. The results indicate that using the traditional NaSch traffic model results in a significant overestimation of the vehicle lateral response under a windy environment, whereas the LAI-E traffic model can overcome this issue by ensuring a smooth speed transition during the vehicular acceleration/deceleration process. Additionally, when the vehicle accelerates or decelerates at the emergency capability, the additional pitching moment caused by the vehicle inertia force can result in remarkable increase of vertical wheel contact forces. The present study suggests the necessity of considering both realistic traffic behavior and vehicle inertia force during the WTB analysis.

中文翻译：

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考虑现实交通行为和车辆惯性力的风-车-桥耦合分析框架

摘要 大跨度桥梁在强风和交通荷载作用下的性能对保证桥梁的功能性、使用性和车辆行驶安全具有重要意义。在本文中，考虑到实际交通行为和车辆惯性力，提出了一种创新的风-交通-桥梁 (WTB) 交互模型，用于预测大跨度桥梁和行驶车辆在侧风下的动态性能。在这方面，通过整合动力学理论、车辆性能和驾驶员反应，开发了旨在忠实再现现实交通流的 LAI-E 交通仿真模型。结果表明，使用传统的 NaSch 交通模型会导致大风环境下车辆横向响应的显着高估，而 LAI-E 交通模型可以通过确保车辆加速/减速过程中的平稳速度过渡来克服这个问题。此外，当车辆在应急能力下加速或减速时，车辆惯性力引起的附加俯仰力矩会导致垂直车轮接触力显着增加。目前的研究表明在 WTB 分析过程中考虑现实交通行为和车辆惯性力的必要性。