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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.80 No.6
- 발행연도
- 2021.12
- 수록면
- 749 - 765 (17page)
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초록· 키워드
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Suspension bridges bear large eccentric live loads in rush hours when most vehicles travel in one direction on the left or right side of the bridge. With the increasing number and weight of vehicles and the girder widening, the eccentric live load effect on the bridge behavior, including bending and distortion of the main girder, gets more pronounced, even jeopardizing bridge safety. This study proposes an analytical algorithm based on multi-catenary theory for predicting the suspension bridge responses to eccentric live load via the nonlinear generalized reduced gradient method. A set of governing equations is derived to solve the following unknown values: the girder rigid-body displacement in the longitudinal direction; the horizontal projection lengths of main cable’s segments; the parameters of catenary equations and horizontal forces of the side span cable segments and the leftmost segments of middle span cables; the suspender tensions and the bearing reactions. Then girder’s responses, including rigid-body displacement in the longitudinal direction, deflections, and torsion angles; suspenders’ responses, including the suspender tensions and the hanging point displacements; main cables’ responses, including the horizontal forces of each segment; and the longitudinal displacement of the pylons’ tower top under eccentric load can be calculated. The response of an exemplar suspension bridge with three spans of 168, 548, and 168 m is calculated by the proposed analytical method and the finite element method in two eccentric live load cases, and their results prove the former’s feasibility. The nonuniform distribution of the live load in the lateral direction is shown to impose a greater threat to suspension bridge safety than that in the longitudinal direction, while some other specific features revealed by the proposed method are discussed in detail.
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참고문헌 (27)
참고문헌 신청
Arco, D. C. / 2001 / Preliminary static analysis of suspension bridges / Eng. Struct 23(9):1096~1103
Bridge Science Research Institute / 1996 / Major Bridge Engineering Bureau of the Ministry of Railways Suspension Bridge / Science and Technology Document Press
Cao, H.Y. / 2017 / Layout and size optimization of suspension bridges based on coupled modelling approach and enhanced particle swarm optimization / Eng. Struct 146:170~183
Cao, H.Y / 2018 / Feasible range for midtower lateral stiffness in three-tower suspension bridges / J. Bridge Eng. 23:06017009
Chai, S. B. / 2016 / Approximate calculation for deformation of multi-tower suspension bridges / Struct. Eng. Int 26:45~51
Bridge Science Research Institute / 1996 / Major Bridge Engineering Bureau of the Ministry of Railways Suspension Bridge / Science and Technology Document Press
Cao, H.Y. / 2017 / Layout and size optimization of suspension bridges based on coupled modelling approach and enhanced particle swarm optimization / Eng. Struct 146:170~183
Cao, H.Y / 2018 / Feasible range for midtower lateral stiffness in three-tower suspension bridges / J. Bridge Eng. 23:06017009
Chai, S. B. / 2016 / Approximate calculation for deformation of multi-tower suspension bridges / Struct. Eng. Int 26:45~51
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