Optimal design of an arch bridge with high performance steel for bridges using genetic algorithm

Park, Jaegyun; Chun, Yun-Hee; Lee, Jungwhee

doi:10.1007/s13296-016-6024-y

Cited by 10 publications

(5 citation statements)

References 8 publications

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“…The typical procedure is based on: a starting population of individuals (usually a "preset" configuration defined by experience is used as a starting point); each point is characterized by a set of variables, composing the pool of genes of each individual; objective functions are evaluated for each individual to obtain the fitness; a new generation is defined and includes the best individuals from the previous population and new individuals generated with reproduction, crossover and mutation techniques; objective function are evaluated for each new individual; new generations are defined up to convergence. For the case at hand, following [2] and [3], the workflow consisted in: 1) creation of FEM model based on the starting geometry; 2) random increment of area for each structural element to create a new individual; 3) structural analysis of this new individual from point 2; 4) determination of fitness functions for each individual; 5) use of the genetic algorithm to define the new individuals based on the elitism, mutuation and crossover between different genes; 6) structural analysis of this new individuals from point 5; 7) iteration from point 4 to 6 until the optimal solution is reached. The software chosen for the parametric structural analysis is Grasshopper associated with SAP2000.…”

Section: The Swing Bridges Over the Suez Canalmentioning

confidence: 99%

Structural designs that required thinking

Bosetti

2023

Theoretical and Applied Mechanics - AIMETA 2022

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Abstract. We discussed the peculiarities of three structural projects. The El Ferdan swing bridge over the Suez Canal, the longest in the world, required the optimization of structural weight and deflection, pursed with genetic algorithms. The Museum of the Future in Dubai, is supported by a single-layer steel gridshell following a pseudo-toroidal double-curvature surface, which required the optimization of a great number of diagrid nodes, parametrically designed with a custom tool. The competition-winner project for the new Stadio Milano follows the vision of a Gothic Cathedral with slender buttresses, tall multi-storey arched frames, all covered by a first-class cable-supported glazed facade, which fulfils the clean “glass-box” architectural intent. Although very sophisticated calculation tools are available, these experiences suggest that the human contribution of the structural engineer is still, at least for now, of paramount importance.

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Section: The Swing Bridges Over the Suez Canalmentioning

confidence: 99%

Structural designs that required thinking

Bosetti

2023

Theoretical and Applied Mechanics - AIMETA 2022

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“…where 0 is allowable normal compressive stress, which will not cause the ultimate limit state to be exceeded. Normal stresses are defined in lower fibres , in accordance with (11)…”

Section: Formulation Of the Optimal Control Problemmentioning

confidence: 99%

“…Examples of the determination of the optimum shape of brick masonry arches under dynamic loads by cellular automata were presented by Kumarci et al [10]. Issues related to the optimal design of a steel arch bridge using a genetic algorithm were presented in [11], where the effectiveness of the optimal design of an arch bridge made of high performance steel was analysed in comparison with a conventional design. The problem concerning the shape optimization of concrete open spandrel arch bridges by the simultaneous perturbation stochastic approximation algorithm was discussed in [12].…”

Section: Introductionmentioning

confidence: 99%

The Optimal Design of an Arch Girder of Variable Curvature and Stiffness by Means of Control Theory

Jasińska

Kropiowska

2018

Mathematical Problems in Engineering

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The problem of optimal design of the statically indeterminate arch girder which constitutes the primary structural system of the arch bridge is presented. The task is to determine the optimal shape of the axis of the arch girder, as well as the optimal distribution of the cross section height, ensuring the minimum arch volume as well as fulfillment of the standard requirements. This optimisation task, with numerous control functions and constraints, is formulated as a control theory problem with maintaining the formal structure of the minimum principle and then transformed to the multipoint boundary value problem and solved by means of numerical methods. The numerical results are obtained with optimal control methods, using the Dircol software. Since the changes in the shape and cross-section of the arch affect the distribution of the dead and moving loads transferred on the girder from the bridge deck, the optimisation procedure is combined with the finite element method analysis, which together with the complexity of the multidecision arch optimisation problem accounts for the novelty of the proposed approach. The numerical analysis reveals that the optimal girder shape is the frame-arched structure, with considerable lengths of straight sections and only short arch elements, in the areas of the application of concentrated forces and moments. The presented method can be successfully extended to optimisation of structures with different static schemes and load categories taken into account.

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“…Besides numerical techniques or conventional mathematical methods, determining the optimum parameters of a TMD is an optimization problem that can be solved by the application of optimization algorithms as well. The genetic algorithm proposed by Halland in 1992 has been increasingly applied in engineering fields of study [14], particularly in civil engineering problems [15][16][17][18][19]. This algorithm has also been widely used in finding the optimum parameters of TMDs [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Tuned Mass Damper Parameters Design by Means of Meta-Heuristic Optimization Algorithms

Alkasassbeh¹,

Yasin²,

Almasaeid³

2023

cea

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Tuned mass dampers (TMDs) as vibration-mitigating devices are widely used in structures to reduce their displacement response under dynamic forces. Through a novel dolphin echolocation (DE) algorithm, this paper provides optimum tuning of TMD parameters. Developing some features of this algorithm results in a faster convergence to the optimum solution. Besides, grey wolf and whale optimization algorithms (GWO and WOA), as two other nature-based meta-heuristic algorithms, are employed in this problem. The modified DE illustrates a more optimum design of TMD's parameters rather than GWO and WOA. The code has been verified by a sample structure from the literature and then applied to a high-rise forty-story structure under strong ground motions. The numerical results reveal that the optimum TMD is viable in attenuating the structural responses, including relative displacements and absolute accelerations under different earthquake excitations. For instance, in the high-rise structure, the modified DE, GWO, and WOA reduce the maximum displacements up to 45%, 43%, and 38%, respectively. Moreover, the algorithms, specifically the modified DE, propose more cost-effective designs in comparison with previous studies in the literature by introducing smaller TMD parameters.

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Optimal design of an arch bridge with high performance steel for bridges using genetic algorithm

Cited by 10 publications

References 8 publications

Structural designs that required thinking

Structural designs that required thinking

The Optimal Design of an Arch Girder of Variable Curvature and Stiffness by Means of Control Theory

Tuned Mass Damper Parameters Design by Means of Meta-Heuristic Optimization Algorithms

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