Abstract
The determination of the statistical characteristics of bridge deflections due to a load of a vehicle moving across the span of a bridge is frequently a problem of great interest for bridge engineers. Developed herein is a spectral approach for evaluating the variation of bridge deflections due to a vehicle moving at constant speed along a rough bridge surface. Based on the above-mentioned approach, this study presents a closed-form solution for variances of bridge deflections. An example of application of the solution to the estimation of variances of bridge deflections is also presented. The effects of pavement type, vehicle speed, and bridge span on standard deviation of bridge deflections are investigated. The results of numerical examples show that if the effect of engine motions on vehicle vibrations is disregarded, the standard deviation of bridge deflections is proportional to the square root of the pavement roughness coefficient a for a specified vehicle speed.Key words: moving load, bridge deflection, pavement roughness.
Publisher
Canadian Science Publishing
Subject
General Environmental Science,Civil and Structural Engineering
Cited by
15 articles.
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