Open AccessBook Chapter
Optimization of cable-stayed bridges with box girder decks
Luis Simões,João Negrão +1 more
- pp 21-32
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TLDR
In this article, a multicriteria approach is considered for the optimization of a box-girder bridge, with constraints on maximum stresses, minimum stresses in stays and deflections under dead load condition.Abstract:
Box-girder decks are very effective solutions for long span cable-stayed bridges, due to their high torsional stiffness and streamlined profile, which usually lead to a good aerodynamic behaviour. A study on the optimization of such structural system is presented in this paper. The deck is modelled through the assembly of planes of plate-membrane elements. A multicriteria approach is considered for the optimization itself, with constraints on maximum stresses, minimum stresses in stays and deflections under dead load condition. Two illustrative examples are shown.read more
Citations
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Determination of initial cable forces in prestressed concrete cable-stayed bridges for given design deck profiles using the force equilibrium method
TL;DR: In this paper, a new method utilizing the idea of force equilibrium is presented for the determination of initial cable forces in a prestressed concrete cable-stayed bridge for a given vertical profile of deck under its dead load.
Journal ArticleDOI
Optimization of cable tensioning in cable-stayed bridges
TL;DR: In this paper, a unit force method for cable-stayed bridges is proposed. But this method is not restricted to the design of cable-stay bridges and may well be used for other structural applications in the future.
Journal ArticleDOI
Determination of optimum post-tensioning cable forces of cable-stayed bridges
TL;DR: In this paper, a novel approach combining finite element analysis, B-spline curves, and an optimization technique is presented to determine the optimum post-tensioning cable forces under dead load corresponding to the final configuration of the bridge.
Journal ArticleDOI
Optimization of stay cables in cable-stayed bridges using finite element, genetic algorithm, and B-spline combined technique
Mahmoud Hassan,Mahmoud Hassan +1 more
TL;DR: In this paper, a robust design optimization technique was developed to achieve the minimum cross-sectional areas of stay cables in cable-stayed bridges, which integrates finite element method, B-spline curves, and genetic algorithm.
Journal ArticleDOI
Optimization of cable forces on concrete cable-stayed bridges including geometrical nonlinearities
TL;DR: In this article, a numerical method to compute the cable stays prestressing forces on concrete cable-stayed bridges to achieve the desired final geometry is presented, which includes a discrete direct sensitivity analysis module and an entropy-based algorithm for structural optimization.
References
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A replacement for the srss method in seismic analysis
TL;DR: In this article, a complete quadratic combination (CQC) method is proposed to reduce errors in modal combination in all examples studied, and it is recommended that the new approach be used as a replacement for the SRSS method in all response spectrum calculations.
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Optimization of cable-stayed bridges with three-dimensional modelling
João Negrão,Luis Simões +1 more
TL;DR: In this article, an analytical sensitivity analysis and optimization implementation for cable-stayed bridge design is described, which is based on the Vax/VMS version of the Modulef code [1 MODULEF Reference Guide.
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Sizing and geometry optimization of cable-stayed bridges
Luis Simões,João Negrão +1 more
TL;DR: In this article, a method which sets steel cable-stayed bridge design in a multi-objective optimization context with goals of minimum cost and stress is described, where cable anchor positions on the main girder and pylon and the cross-sectional sizes of the structural members are dealt with as design variables.
Journal ArticleDOI
Nonlinear modelling of cable-stayed bridges
Worsak Kanok-Nukulchai,Guan Hong +1 more
TL;DR: In this paper, the authors present an application of a powerful thin-walled element and a special cable element for three-dimensional modeling of steel cable-stayed bridges, where both linear and nonlinear effects are considered, as geometric nonlinearity may arise from the finite displacement of the bridge deck and the cables.