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Số người truy cập: 107,611,413

 Effects of Random Road Roughness on Dynamic Impact Factor of Cable-Stayed Bridge Subjected
to Moving Vehicle
Tác giả hoặc Nhóm tác giả: Xuan-Toan Nguyen, Duy-Thao Nguyen*, Van-Duc Tran,
and Thi-Kim-Loan Nguyen
Nơi đăng: Lecture Notes in Civil Engineering, Springer (Indexed by SCOPUS).; Số: 203;Từ->đến trang: 147-156;Năm: 2022
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT

ABSTRACT
In this study, a two-dimensional vehicle-bridge dynamic interactionmodel
is presented to analyze the dynamic impact factor of a cable-stayed bridge in service
by considering the effect of the random road surface roughness. The bridge system
including girder, towers, and cables is discretized by using the finite element method.
The common model of random road roughness vertical profiles is applied in the
form of a stationary and ergodic Gaussian process in space. Random samples of road
roughness vertical profiles are generated with the Monte-Carlo simulation method.
A two-dimension vehicle model with 4 degrees of freedom is adopted. Based on the
d’Alembert’s principle, the coupled equation of motion of cable-stayed bridge and
vehicle are established by combining both the bridge and vehicle using the interaction
force relationship at the contact point. Solutions of the coupled equation of motion in
the time domain are solved using the Runge-Kutta-Merson method. The accuracy of
numerical results is validated by field test results of the Pho Nam cable-stayed bridge
at Danang city, Vietnam. Additionally, the influences of random road roughness on
the dynamic impact factor of the bridge were discussed in detail. The results of the
dynamic impact factor study show that bridge design codes currently underestimate
the dynamic response of the bridge for moving vehicles under different road surface
conditions. The findings of this study can be utilized for future design.
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