FE modeling of moving load effect on two span bridge

Abstract

The problem of simulation of moving load effect on bridges is a relatively old problem. It was induced by the collapse of the Chester Rail Bridge in England in the year 1847 and can be traced in the literature since the year 1849. The new generation of young research workers is capable to contribute to the solution of the problem with new findings. The contribution is devoted to the modeling of the vehicle motion along a two-span bridge in the environment of the program system ADINA. The task is solved as a plane problem. It described the creation of a discrete computational model of vehicle with 8 degrees of freedom. The bridge is modeled using beam elements. It is assumed that the vehicle enters the bridge already vibrant. The vehicle and bridge response is modeled when vehicle driving at the speed of 70 km/h. The time course of oscillation of vehicle model's characteristic points and the oscillation of mid spans of individual bridge fields are shown graphically. Important results are given in numerical form. The Newmark's method is used for the solution of equations of motion.

Two-span bridge under moving load – numerical and experimental approach

“…It is necessary to create a numerical model as the most describe the real situation on construction. The vehicle-bridge contact task model was created in computer software ADINA based on the FEM principle [18]. The FEM is a very often used method for differential equations calculating.…”

Dynamic Response Analysis of Simply Supported Bridge through Experimental and Numerical Modelling Approaches

“…Historically, the bridges were designed with consideration of static load only and the influence of dynamic load was neglected. The dynamic response of bridges was first studied in the middle of the 19th century (González 2010;Valašková et al 2019) after the collapse of the Chester Railway Bridge in the U.K. In the design of modern bridges, the influences of dynamic load are considered by multiplying the static load with a factor called the Impact factor to approximate dynamic effects (Wolek, 1996;Billing, 1984;Chang et al, 1994;Mohseni et al, 2014).…”