高墩连续桥在移动车载作用下的横向振动分析

本文在将轮胎与路面之间的面接触引入车-桥耦合模型的基础上，进一步考虑车辆的横向自由度，从而提出一种新的车辆模型来研究移动车载作用下的桥梁横向振动。车辆轮胎被模拟成一个三维弹簧模型，轮胎与地面的接触面模拟成长方形，通过接触面间的位移协调条件和力相互作用建立车-桥耦合振动方程。考虑影响接触面间的横向力大小的三种重要参数如：滑移角、侧偏角、轮胎的“S”形运动对耦合系统的影响；并与炉坪大桥实测数据比较，验证本文方法的正确性，并分析了接触面积、车速等对横向振动的影响。

Lateral Vibration of High-pier Bridge under Moving Vehicular Loads

This paper is mainly focused on establishing a new model considering the bridge’s lateral vibration induced by moving vehicles. The vehicle tire is modeled as a three-dimensional elementary spring model, and the contact patch is assumed to be a rectangle. Three significant factors that affect the lateral forces, including the slip angle, camber angle, and vehicle tires moving with “S” shape, are introduced in studying the effect of the lateral forces on the lateral vibration of bridges. The bridge-vehicle coupled equations are established by combining the equations of motion of both the bridge and vehicle using the displacement relationship and interaction force relationship at the patch contact. The accuracy and efficiency of the present method are verified by comparing the simulations and the field test results of a typical high-pier bridge, showing that the proposed method can rationally simulate the lateral vibration of the bridge under moving vehicular loads.