Response of Simple-Span Highway Bridges to Moving Vehicles

摘要

The report presents the results of an extensive analytical investigation into the response of simple span highway bridges to moving vehicles. The study involved the following steps: (1) The identification of the parameters governing the response of the bridge, (2) Evaluation of the practical range of these parameters by study of the characteristics of various bridges and vehicles, (3) Compilation of a large number of numerical solutions for estimating the magnitude of the resulting dynamic effects, and (4) The interpretation of this information from the point of view of design. In the numerical solutions the bridge is idealized as a single beam, but divided into several masses with damping, and the vehicle is represented as a multiple axle sprung load. Initial vehicle oscillation, interleaf friction, damping of the suspension system, vehicle speed, mass of vehicle and axle spacing were some of the vehicle parameters investigated, while bridge type, bridge roughness, sag and camber and bridge damping were some of the bridge parameters studied.