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 Dynamic interaction between the two-axle vehicle and continuous girder bridge with considering vehicle braking force
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Tác giả hoặc Nhóm tác giả: Nguyen Xuan Toan
Nơi đăng: Vietnam Journal of Mechanics; Số: Vol .36, No.1;Từ->đến trang: 49–60;Năm: 2014
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Trong nước
TÓM TẮT
Nowadays, the structures of continuous girder bridges are becoming more and more popular with the rapid development of highway networks in many nations around the world, including Vietnam. High strength materials are commonly used to construct the bridge structures, so they are very slender and sensitive to the effects of dynamic loads, especially in the cases that vehicles run with high speed or brake suddenly on the bridges. In this paper, the author would like to introduce the study of a model of dynamic interaction between two-axle vehicle and continuous girder bridge. Modeling which has been considered with braking force indicates that the inertia force of vehicle and reaction force from the surface of bridges make vehicles oscillate. Vertical reaction forces of axles which change with time make bending vibration of beam increase significantly. The results of the experiment on the Hoaxuan Bridge and the analysis of the computerized model indicate that dynamic magnification factors are substantial when vehicle brakes suddenly on bridge.
ABSTRACT
Nowadays, the structures of continuous girder bridges are becoming more and more popular with the rapid development of highway networks in many nations around the world, including Vietnam. High strength materials are commonly used to construct the bridge structures, so they are very slender and sensitive to the effects of dynamic loads, especially in the cases that vehicles run with high speed or brake suddenly on the bridges. In this paper, the author would like to introduce the study of a model of dynamic interaction between two-axle vehicle and continuous girder bridge. Modeling which has been considered with braking force indicates that the inertia force of vehicle and reaction force from the surface of bridges make vehicles oscillate. Vertical reaction forces of axles which change with time make bending vibration of beam increase significantly. The results of the experiment on the Hoaxuan Bridge and the analysis of the computerized model indicate that dynamic magnification factors are substantial when vehicle brakes suddenly on bridge.
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