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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The influence of roadway surface irregularities and vehicle deceleration on bridge dynamics using the method of lines
In this paper, an analysis of vehicle-bridge interaction problems, taking into account the dynamic effects induced by vehicle bouncing due to roadway surface irregularities and varying vehicle speeds, is presented. The problem formulation and solution methodology include the effects of vehicle suspension systems, the vehicle travelling path, and the arbitrary boundary conditions and geometry of the bridge superstructure. The kinematic coupling reflecting the dynamic interaction between the traversing vehicle and the vibrating bridge superstructure is explicitly treated in the problem. Vehicle models used in this study take into account the stiffness and damping characteristics of vehicle suspension and tires, and permit the inclusion of a variety of truck configurations. The spatial discretization of the governing differential equation of the vehicle-bridge system is based on the finite element method. The current study illustrates the importance of damping characteristics in reducing vehicle vibration. It is also shown that certain combinations of bump characteristics, such as bump height and length, and vehicle speed can result in very high dynamic effects. From a practical perspective, to reduce damage on bridges due to truck loading, in addition to speed, certain regulations on truck suspension and tire characteristics may be necessary. The current results further indicate that vehicle deceleration, which may be used to represent braking, may have a significant effect on bridge dynamics. Experimental findings reported by Major show that sudden braking may cause up to 20 % and 30 % excess on smooth and bumpy bridges, respectively. It is emphasized in this study that these values of excess can be accurately predicted if frictional forces caused by braking are taken into account in the analysis.
The influence of roadway surface irregularities and vehicle deceleration on bridge dynamics using the method of lines
In this paper, an analysis of vehicle-bridge interaction problems, taking into account the dynamic effects induced by vehicle bouncing due to roadway surface irregularities and varying vehicle speeds, is presented. The problem formulation and solution methodology include the effects of vehicle suspension systems, the vehicle travelling path, and the arbitrary boundary conditions and geometry of the bridge superstructure. The kinematic coupling reflecting the dynamic interaction between the traversing vehicle and the vibrating bridge superstructure is explicitly treated in the problem. Vehicle models used in this study take into account the stiffness and damping characteristics of vehicle suspension and tires, and permit the inclusion of a variety of truck configurations. The spatial discretization of the governing differential equation of the vehicle-bridge system is based on the finite element method. The current study illustrates the importance of damping characteristics in reducing vehicle vibration. It is also shown that certain combinations of bump characteristics, such as bump height and length, and vehicle speed can result in very high dynamic effects. From a practical perspective, to reduce damage on bridges due to truck loading, in addition to speed, certain regulations on truck suspension and tire characteristics may be necessary. The current results further indicate that vehicle deceleration, which may be used to represent braking, may have a significant effect on bridge dynamics. Experimental findings reported by Major show that sudden braking may cause up to 20 % and 30 % excess on smooth and bumpy bridges, respectively. It is emphasized in this study that these values of excess can be accurately predicted if frictional forces caused by braking are taken into account in the analysis.
The influence of roadway surface irregularities and vehicle deceleration on bridge dynamics using the method of lines
Der Einfluß von Straßenbelagsunregelmäßigkeiten und Fahrzeugverzögerung auf die Brückendynamik, bestimmt mit dem Linienverfahren
Chompooming, K. (Autor:in) / Yener, M. (Autor:in)
Journal of Sound and Vibration ; 183 ; 567-589
1995
23 Seiten, 13 Bilder, 1 Tabelle, 20 Quellen
Aufsatz (Zeitschrift)
Englisch
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