Abstract
The cable-stayed bridge (CSB) is often used to span over the large rivers on the highway with a high-level navigational clearance; however, CSB is very sensitive to live load. Most of the previous studies on vibration analysis of CSB that focus on complex traffic loading and vehicle dynamic interaction as well as on the bridge deck do not consider braking effects thoroughly. In this paper, the finite element method (FEM) is used to investigate the dynamic response of CSB due to a three-axle vehicle considering braking effects. Vertical reaction forces of axles that change with time make bending vibration of the bridge deck increase significantly. The braking in a span is able to create response in other spans, towers, and cables. In addition, the impact factors are investigated on both FEM and experiment with a case study of Pho Nam bridge (Danang city, Central Vietnam). The results of this study provide an improved understanding of the CSB dynamic behaviors, and they can be used as useful references for bridge codes by practicing engineers.
Highlights
Researchers have studied the response of bridges subjected to vehicles moving since the 50s of the 19th century
This paper presents the results of the dynamic response of cablestayed bridge subjected to dynamic wheel loads by finite element method (FEM) analysis and experimental investigation
Through experimental results and FEM analysis of Impact Factor (IF) at positions 1, 2, 3, and 4 of the Pho Nam bridge shown in Figures 22 and 23, the authors have following comments: Figure 21: The KAMAZ-55111 dumper truck
Summary
Researchers have studied the response of bridges subjected to vehicles moving since the 50s of the 19th century. Gupta and Trail-Nash [3] investigated the dynamic behavior of bridge model with single span uniform beam considering the road surface irregularities and vehicle braking force. Zhang and Xie [9] studied dynamic responses of CSBs under vehicular loads using the FEM, while the local vibration of stay cables is analyzed using the substructure method. Toan et al [12,13,14,15] studied the dynamic vibration of a cable-stayed bridge subjected to moving vehicles considering the braking forces and the variable acceleration. The main objective of the test is to validate a calculation procedure for determination of the Impact Factor (IF) of cable-stayed bridge to dynamic wheel loads due to vehicle speed and braking effects.
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