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Calculation of Cable Force and Pre-Camber for Long-Span Rib Arch Bridge Construction by Unstressed State Control Method
Calculation of cable force and pre-camber is the key and difficult problem in construction; it affects the final cable forces and deformations of arch rib after removal of the cables. Daning River Bridge has a span of 400 meters and is the longest arch bridge having steel truss rib in China. The main arch comprises of three arch trusses connected by bracings, the trusses were installed using non-framework cable hoisting whereby all the segments are hoisted one by one, and all the cables use one-time tensioning method. Unstressed state control method is introduced in the construction of Daning River Bridge; unstressed qualities of truss and unstressed length of cable can be obtained by optimization analysis of the maximum cantilever state in construction; and be modified in the forward-iteration method with a reasonable install sequence of truss segment, to maintain it unchangeable. According to unstressed state control method, the cable forces and pre-camber of each segment were calculated using the forward-iteration method. These results offer the basis for construction control, and guarantee the arch rib line and cable forces to meet the design request, and the arch closure with high precision.
Calculation of Cable Force and Pre-Camber for Long-Span Rib Arch Bridge Construction by Unstressed State Control Method
Calculation of cable force and pre-camber is the key and difficult problem in construction; it affects the final cable forces and deformations of arch rib after removal of the cables. Daning River Bridge has a span of 400 meters and is the longest arch bridge having steel truss rib in China. The main arch comprises of three arch trusses connected by bracings, the trusses were installed using non-framework cable hoisting whereby all the segments are hoisted one by one, and all the cables use one-time tensioning method. Unstressed state control method is introduced in the construction of Daning River Bridge; unstressed qualities of truss and unstressed length of cable can be obtained by optimization analysis of the maximum cantilever state in construction; and be modified in the forward-iteration method with a reasonable install sequence of truss segment, to maintain it unchangeable. According to unstressed state control method, the cable forces and pre-camber of each segment were calculated using the forward-iteration method. These results offer the basis for construction control, and guarantee the arch rib line and cable forces to meet the design request, and the arch closure with high precision.
Calculation of Cable Force and Pre-Camber for Long-Span Rib Arch Bridge Construction by Unstressed State Control Method
Tian, Weifeng (author) / Zhang, Liangliang (author) / Ayad, Thabit Saeed (author)
Third International Conference on Transportation Engineering (ICTE) ; 2011 ; Chengdu, China
ICTE 2011 ; 2104-2109
2011-07-13
Conference paper
Electronic Resource
English
| Trans Tech Publications | 2011
| European Patent Office | 2024
Construction Simulation of Long-Span Arch Rib Bridge
| Trans Tech Publications | 2011