Optimum Design of Stay Cables of Steel Cable-stayed Bridges Using Nonlinear Inelastic Analysis and Genetic Algorithm

Ha, Manh-Hung; Vu, Quoc-Anh; Truong, Viet-Hung

doi:10.1016/j.istruc.2018.10.007

Cited by 59 publications

(18 citation statements)

References 31 publications

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“…This paper adopted Roulette Wheel Selection as the selection method [23][24][25][26]. Individuals with high fitness values (low LCC value) have a higher probability of being selected, while individuals with low fitness values (high LCC value) have a higher probability of being eliminated.…”

Section: Selection Crossover and Mutation Operationsmentioning

confidence: 99%

Intelligent Optimization Algorithm for Maintenance Scheme Based on Life Cycle Cost

Liu¹,

Li²,

Wang³

et al. 2020

JESA

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In engineering practice, to make sure that a project can achieve safe operation while minimizing the overall cost during the whole life cycle, the supervisor of the project generally needs to make optimal decisions for the Life Cycle Cost (LCC) of the project. To this end, this paper adopted Genetic Algorithms (GA) and LCC theory to propose and implement a kind of optimization algorithms suitable for solving maintenance scheme problems. Combining with the selection of three actual maintenance scenarios of "take no maintenance measure/preventive maintenance measures only", "take major maintenance measures", and "take major maintenance measures and preventive maintenance measures", the proposed algorithm adopted real number coding to give optimization solutions from two perspectives of "control service life and calculate cost" and "control cost and calculate service life"; moreover, the paper conducted a comparative analysis on the maintenance schemes of reinforced concrete bridge decks using Matlab and verified the reliability and efficiency of the proposed algorithm. Keywords:life cycle cost (LCC), intelligent optimization, genetic algorithm (GA), optimal solution, maintenance scheme LCC ANALYSIS OF THE EXAMPLE PROJECT Description of the problemLCC analysis is the basis of engineering projects and scheme optimization, this paper took the reinforced concrete bridge deck as the research object, the initial reliability was set to be β=8.0, the degradation start time was set as T1=15, and Journal Européen des Systèmes Automatisés

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Section: Selection Crossover and Mutation Operationsmentioning

confidence: 99%

Intelligent Optimization Algorithm for Maintenance Scheme Based on Life Cycle Cost

Liu¹,

Li²,

Wang³

et al. 2020

JESA

View full text Add to dashboard Cite

show abstract

“…[13] designed an optimization method for the minimum cost design of a pre-stressed concrete cablestayed bridge; the number of pre-stressed tendons in the beam, the cable forces of the beam and pylon, the cable size and section area were taken as the design variables, and the stress and displacement constraints were applied to ensure the safe use of the bridge structure. In 2018, Ha et al [14] created an effective optimization method for cables of steel cable-stayed bridge, with the aid of nonlinear inelastic analysis and a micro GA; the main innovation lies in the optimization of initial tension and total weight of the cables. In 2018, Song et al [15] put forward a counterweight-based optimization method for cable forces of long-span asymmetric cable-stayed bridge, which optimizes the cable forces through the variable step search of design variables like cable forces, load, and counterweight range.…”

Section: Introductionmentioning

confidence: 99%

A Practical and Safe Optimization Method for Temporary Cable Layout on the Upper Beam of Beam-Arch Composite Rigid Frame Bridge

Ding¹,

Xiang²,

Li³

et al. 2020

IJSSE

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Long-span beam-arch composite rigid frame is a novel type of bridge structure. The safe operation of this bridge mainly depends on the bearing capacity of the root section of the upper beam. The upper beam is often constructed by the cantilever method using temporary cables (cable-stayed cantilever method). If the cable layout and cable forces are not reasonable, a plastic hinge will gradually form the root section of the upper beam under the unfavorable internal forces, posing a severe threat to the bridge safety. Therefore, this paper mainly aims to optimize the layout of temporary cables for the implementation of cable-stayed cantilever method. Firstly, the authors explored the essential function of the temporary cables on the upper beam. Next, four different methods for cable force optimization were compared, and the optimal method was identified for the upper beam of long-span beam-arch composite rigid frame bridge. Finally, 78 groups of temporary cable layouts were compared to find the optimal pattern. The results show that the essential function of the temporary cables on the upper beam is to reduce the negative bending moment on the root section of the upper beam at the completion state; the optimal method for cable force optimization is to tension the j-th temporary cable to the tensile stress on the lower edge of the upper beam; it is recommended to tension five temporary cables during the implementation of cable-stayed cantilever method. The research results provide new insights into the safety enhancement of beam-arch composite rigid frame bridges.

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“…The efficiency of meta-heuristic algorithms for structural design has been proved by the results of many studies in the literature, for example, Refs. [1][2][3][4][5][6][7][8]. Besides that, lots of meta-heuristic algorithms have been proposed such as big bang-big crunch (BB-BC) [9], Truong, V.-H., et al / Journal of Science and Technology in Civil Engineering differential evolution (DE) [10], enhanced colliding bodies optimization (ECBO) [11], and harmony search (HS) [12].…”

Section: Introductionmentioning

confidence: 99%

Optimization of steel moment frames with panel-zone design using an adaptive differential evolution

Truong

Hung

Pham

et al. 2020

STCE

Self Cite

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Optimization of steel moment frames has been widely studied in the literature without considering shear deformation of panel-zones which is well-known to decrease the load-carrying capacity and increase the drift of structures. In this paper, a robust method for optimizing steel moment frames is developed in which the panel-zone design is considered by using doubler plates. The objective function is the total cost of beams, columns, and panel-zone reinforcement. The strength and serviceability constraints are evaluated by using a direct design method to capture the nonlinear inelastic behaviors of the structure. An adaptive differential evolution algorithm is developed for this optimization problem. The new algorithm is featured by a self-adaptive mutation strategy based on the p-best method to enhance the balance between global and local searches. A five-bay five-story steel moment frame subjected to several load combinations is studied to demonstrate the efficiency of the proposed method. The numerical results also show that panel-zone design should be included in the optimization process to yield more reasonable optimum designs. Keywords: direct design; differential evolution; optimization; panel-zone; steel frame.

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Optimum Design of Stay Cables of Steel Cable-stayed Bridges Using Nonlinear Inelastic Analysis and Genetic Algorithm

Cited by 59 publications

References 31 publications

Intelligent Optimization Algorithm for Maintenance Scheme Based on Life Cycle Cost

Intelligent Optimization Algorithm for Maintenance Scheme Based on Life Cycle Cost

A Practical and Safe Optimization Method for Temporary Cable Layout on the Upper Beam of Beam-Arch Composite Rigid Frame Bridge

Optimization of steel moment frames with panel-zone design using an adaptive differential evolution

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