Original scientific paper

Modelling the road bridge-actual traffic dynamic interaction

Damir Markulak orcid.org/0000-0003-4916-1844 ; University J.J. Strossmayer, Faculty of Civil Engineering, Osijek, CROATIA
Ninoslav Truhar ; University J.J. Strossmayer, Faculty of Civil Engineering, Osijek, CROATIA

Abstract

Dynamic response of the road bridge under actual traffic load continuously degrades the serviceability of the bridge and thus its service life. Wheel loads contribute to fatigue surface wear and cracking of concrete which leads to corrosion. The stochastic nature of the actual traffic load, uncertainty in the estimation of dynamic characteristics of real vehicles, dynamic bridge-vehicle interaction, etc., complicates the calculation procedure of the dynamic response of the bridge in many senses. In this paper, we present the approach based on stochastic parameters of the actual traffic flow and numerical calculation of dynamic interaction system bridge-heavy vehicles. Vehicles are modeled as a group of axles (SDOF model) with dynamic characteristics (stiffness and damping), and the bridge is modeled as a continuous elastic system. The proposed method is very useful for numerical simulation of actual traffic influence on the bridge and, at the same time for practical calculation because of its simplicity and acceptable accuracy

Keywords

actual traffic, bridge–vehicle dynamic interaction, road roughness, dynamic factor, bridge dynamic response, simulations of traffic flow

Hrčak ID:

295593

URI

https://hrcak.srce.hr/295593

Publication date:

15.12.2005.

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