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 Vibration and Dynamic Impact Factor Analysis of the Steel Truss Bridges Subjected to Moving Vehicles
Tác giả hoặc Nhóm tác giả: Toan Nguyen-Xuan, Loan Nguyen-Thi-Kim, Thao Nguyen-Duy, Duc Tran-Van
Nơi đăng: Modern Mechanics and Applications. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-16-3239-6_39; Số: ISBN 978-981-16-3238-9;Từ->đến trang: pp 522–536;Năm: 2022
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
The steel truss bridge structure is slender and capable of overcoming large spans, it is very sensitive to the effects of dynamic loads as well as cyclic loading. Under the effect of a moving vehicles, vibrations in the bridge structural elements subjected to high levels. This paper presents some analysis results of vibration and dynamic impact factor (DIF) of the steel truss subjected to moving vehicle by numerical methods. The moving load model is the three-axle vehicle with each axle modeled by two masses and each mass is linked to a spring and a damping. The numerical analysis results of the vehicle-bridge interaction model with and without of internal and external friction coefficient of the structure are similar to the basic dynamics and bridge model subject to moving loads. The amplitude of vibration and internal force of the structure when considering the coefficient of friction is significantly reduced compared to the case without consideration. Furthermore, the DIFs of displacement, shear force, axial force and bending moment change significantly as the vehicle speed varies.
ABSTRACT
The steel truss bridge structure is slender and capable of overcoming large spans, it is very sensitive to the effects of dynamic loads as well as cyclic loading. Under the effect of a moving vehicles, vibrations in the bridge structural elements subjected to high levels. This paper presents some analysis results of vibration and dynamic impact factor (DIF) of the steel truss subjected to moving vehicle by numerical methods. The moving load model is the three-axle vehicle with each axle modeled by two masses and each mass is linked to a spring and a damping. The numerical analysis results of the vehicle-bridge interaction model with and without of internal and external friction coefficient of the structure are similar to the basic dynamics and bridge model subject to moving loads. The amplitude of vibration and internal force of the structure when considering the coefficient of friction is significantly reduced compared to the case without consideration. Furthermore, the DIFs of displacement, shear force, axial force and bending moment change significantly as the vehicle speed varies.
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