Dynamic Studies of Bridges on the AASHO Road Test
Dynamic Studies of Bridges on the AASHO Road Test

Author: University of Illinois (Urbana-Champaign campus)

Publisher:

Published: 1962

Total Pages: 370

ISBN-13:

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The program of dynamic tests conducted on the bridges of the AASHO road test at Ottawa, Illinois studied the dynamic effects produced in test bridges under moving vehicles and related the observed behavior to the results predicted by theory. The experimental setup consisted of actual heavy vehicles and full-scale bridges, although the bridges were to an extent simplified models. Loading tests were made on bridges both with stationary and slowly moving vehicles, to determine the stiffness of the bridges at various stages, and study the lateral distribution of effects in order to determine to what extent the test bridges behaved as a beam, which was an assumption involved in the theoretical solutions used to predict the dynamic behavior. Results are presented of approximately 1900 dynamic tests.

Vehicle-bridge Interaction Dynamics
Vehicle-bridge Interaction Dynamics

Author: Yeong-Bin Yang

Publisher: World Scientific

Published: 2004

Total Pages: 565

ISBN-13: 9812388478

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The commercial operation of the bullet train in 1964 in Japan marked the beginning of a new era for high-speed railways. Because of the huge amount of kinetic energy carried at high speeds, a train may interact significantly with the bridge and even resonate with it under certain circumstances. Equally important is the riding comfort of the train cars, which relates closely to the maneuverability of the train during its passage over the bridge at high speeds.This book is unique in that it is devoted entirely to the interaction between the supporting bridges and moving trains, the so-called vehicle-bridge interaction (VBI). Finite element procedures have been developed to treat interaction problems of various complexities, while the analytical solutions established for some typical problems are helpful for identifying the key parameters involved. Besides, some field tests were conducted to verify the theories established.This book provides an up-to-date coverage of research conducted on various aspects of the VBI problems. Using the series of VBI elements derived, the authors study a number of frontier problems, including the impact response of bridges with elastic bearings, the dynamic response of curved beam to moving centrifugal forces, the stability and derailment of trains moving over bridges shaken by earthquakes, the impact response of two trains crossing on a bridge, the steady-state response of trains moving over elevated bridges, and so on.

A Contribution to Moving Force Identification in Bridge Dynamics
A Contribution to Moving Force Identification in Bridge Dynamics

Author: Andrei Firus

Publisher: Springer Nature

Published: 2023-03-17

Total Pages: 363

ISBN-13: 3658398388

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The knowledge of the real forces acting on a structure are of great importance in the condition assessment process of existing structures. In this sense, this work provides a novel approach for identification of dynamic moving forces acting on a bridge structure. It seeks to find the optimal time dependent force values that minimize the difference between the computed and measured displacement and acceleration time histories for a limited number of sensor locations. The work also presents extensive experimental investigations of the developed method on real structures in operation, which consistently show that it can be successfully used on a wide range of applications: from small structures excited by rather low pedestrian forces up to the "heavy category" of a complete train passing a railway bridge. In this context, a set of particularities and limitations arising in the practical application of the method on real structures are also discussed.