Purpose

Realistic composite vehicles with 2, 3, 5 and 9 axles, consisting of a truck with one or two trailers, are addressed in this paper by computational models for vehicle–bridge interaction analysis.

Design/methodology/approach

The vehicle–bridge interaction (VBI) models are formed by sets of 2-D rigid blocks interconnected by mass, damping and stiffness elements to simulate their suspension system. The passage of the vehicles is performed at different speeds. Several rolling surface profiles are admitted, considering the maintenance grade of the pavement. The spectral density functions are generated from an experimental database to form the longitudinal surface irregularity profiles. A computational code written in Phyton based on the finite element method was developed considering the Euler–Bernoulli beam model.

Findings

Several models of composite heavy vehicles are presented as manufactured and currently travel on major roads. Dynamic amplification factors are presented for each type of composite vehicle.

Research limitations/implications

The VBI models for compound heavy vehicles are 2-D.

Social implications

This work contributes to improving the safety and lifetime of the bridges, as well as the stability and comfort of the vehicles when passing over a bridge.

Originality/value

The structural response of the bridge is affected by the type and size of the compound vehicles, their speed and the conservative grade of the pavement. Moreover, one axle produces vibrations that can be superposed by the vibrations of the other axles. This effect can generate not usual dynamic responses.

中文翻译：

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多挂车复合重卡通过下公路桥梁动力分析

目的

本文通过车辆-桥梁相互作用分析的计算模型来解决具有 2、3、5 和 9 轴的现实复合车辆，包括一辆卡车和一个或两个拖车。

设计/方法论/途径

车桥相互作用 (VBI) 模型由多组二维刚性块组成，这些刚性块通过质量、阻尼和刚度元素互连，以模拟其悬架系统。车辆的通过以不同的速度进行。考虑到路面的维护等级，允许使用多种滚动表面轮廓。谱密度函数是从实验数据库生成的，以形成纵向表面不规则轮廓。考虑到欧拉-伯努利梁模型，开发了基于有限元方法的用 Phyton 编写的计算代码。

发现

多种型号的复合材料重型车辆已制造完毕并目前在主要道路上行驶。给出了每种类型的复合车辆的动态放大系数。

研究局限性/影响

复合重型车辆的 VBI 模型是二维的。

社会影响

这项工作有助于提高桥梁的安全性和使用寿命，以及车辆通过桥梁时的稳定性和舒适性。

原创性/价值

桥梁的结构响应受复合车辆的类型、尺寸、速度以及路面保守坡度的影响。此外，一个轴产生的振动可能会与其他轴的振动叠加。这种效应可以产生不常见的动态响应。