Optimum crossing cable system in multi-span cable-stayed bridges

Cid, Clara; Baldomir, Aitor; Hernández, Santiago

doi:10.1016/j.engstruct.2018.01.019

Cited by 27 publications

(10 citation statements)

References 28 publications

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“…As the FEM used is 2D, the cables of the model represent the combined capacity of the two cable planes of the real bridge. The mechanical properties of the deck and towers are summarized in Cid et al [15]. The permanent loads applied to the FE model are the structural deck weight (DC = 146 kN/m), the weight of the non-structural elements of the deck (DW = 54 kN/m) and the cable prestressing forces (PS).…”

Section: Bridge Descriptionmentioning

confidence: 99%

“…The volume of the cable-system in the real bridge corresponds to 759 m 3 . In a previous work [15], the optimization of the intact model was performed, resulting in a volume of 634.15 m 3 , which corresponds to a reduction of 16.45%.…”

Section: Bridge Descriptionmentioning

confidence: 99%

“…Then, Baldomir et al [14] considered a multi-model optimization technique to minimize the cable weight with crossing cables and fixed anchor positions. Cid et al [15] proposed a methodology to define the optimum cable system in multi-span cablestayed bridges, allowing crossed cables in the main spans, different number of cables at each side of the towers and different cable areas. Martins et al [16] presented a comprehensive summary of the state-of-the-art through an extensive literature survey, with 90 articles studied for a detailed review.…”

Section: Introductionmentioning

confidence: 99%

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Optimum Design of Cable-Stayed Bridges Considering Cable Failure

SOTO

Cid

Baldomir

et al. 2022

WIT Transactions on the Built Environment

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A methodology to obtain the minimum weight of cables in cable-stayed bridges when a cable fails has been developed. To this end, a multi-model strategy is proposed that takes into account design constraints in both the intact and damaged models. The dynamic effect of the cable breakage is considered by the application of impact loads at the tower and deck anchorages. The methodology is applied to the Queensferry Crossing Bridge, a multi-span cable-stayed bridge with cross stay cables in the central section of each main span. The number of cables, anchorage position on the deck, cable areas and prestressing forces are considered as design variables into the optimization process simultaneously. The fail-safe optimum design results in a different cable layout than the optimized design of the intact structure, with minimum volume increase.

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Section: Bridge Descriptionmentioning

confidence: 99%

Section: Bridge Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimum Design of Cable-Stayed Bridges Considering Cable Failure

SOTO

Cid

Baldomir

et al. 2022

WIT Transactions on the Built Environment

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“…To obtain the global optimum, Cheng (Cheng 2010) firstly applied the genetic algorithm combining the FE method in the optimum design of steel truss arch bridges. After that, some other optimization algorithms also have been utilized in cable forces optimization, for example, the multi-objective genetic algorithm (Cai and Aref 2015), the particle swarm optimization (PSO) (Chen et al 2015;Cao et al 2018), the micro-genetic algorithm (Ha et al 2018), the simulated annealing (Guo et al 2019), the sequential quadratic programming algorithm (Cid et al 2018), and the enhanced artificial bee colony algorithm (Latif and Saka 2019). These optimization algorithms, especially the metaheuristic optimization algorithms, often require a considerable number of structural response evaluations in the iteration process, which makes these approaches inefficient, especially for the FE-based structural response evaluation approach.…”

Section: Introductionmentioning

confidence: 99%

Hanger pre-tensioning force optimization of steel tied-arch bridges considering operational loads

Cao

Chen

Yang

et al. 2020

Struct Multidisc Optim

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Full design analysis of a bridge usually has lots of load cases and leads to the analysis process, which is extremely timeconsuming. To reduce the computational cost, the existing hanger pre-tensioning force optimization approaches for cablesupported bridges always consider only a few critical load cases. This study presents an efficient approach for hanger pretensioning force optimization of steel tied-arch bridges, which can include all the operational loads and their combinations based on the code requirements. The proposed method develops a load decoupling approach (LDA) to enhance the computational efficiency of structural analysis in optimization and utilize the particle swarm optimization algorithm to search the global optimal design. The LDA divides the structural analysis procedure into two systems: (1) iteration-varying and (2) iteration-invariant. The former evaluates the structural responses induced by different hanger forces using unit load method (ULM) and the latter solely needs a single finite element (FE) analysis before iteration to calculate the structural responses caused by the other loads. The superposition principle combines the results from the two systems to identify the minimum safety margin of the bridge under the ultimate limit state. A practical bridge is examined to compare the proposed method with three traditional hanger force determination approaches. The obtained results illustrate that the proposed method not only owns high efficiency but also leads to a safer design and has a broader application range.

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“…The most representative is the large lateral vibration of the Millennium Bridge in London, which has gained considerable attention since its occurrence. Some characteristics of pedestrian synchronization rate were obtained in the occurrence of lateral vibration through the study of T-bridge in Japan (Cid et al , 2018; Caetano et al , 2017; Ingólfsson et al , 2012; Fujino et al , 1993). The structural vibration response characteristics under different pedestrian densities and synchronization rates were obtained through experiment of the footbridge at Singapore Changi Airport (Bursi et al , 2014; Lievens et al , 2018; Ricciardelli and Demartino, 2016; Vladimir et al , 2017).…”

Section: Introductionmentioning

confidence: 99%

Serviceability analysis of a cable-supported footbridge subjected to human-induced loads

et al. 2019

IJSI

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Purpose The purpose of this paper is to obtain the response time history curves of vertical and lateral acceleration in the span of the main beam under different loads through the finite element time-history analysis method, so as to realize the Serviceability Analysis of a Cable-Supported Footbridge Subjected to Human-Induced Loads, taking the long-span cable-supported footbridge over Dongtan River as an example. Design/methodology/approach The finite element method is used for analysis of the footbridge. Findings It is found that under the condition of low-density pedestrians walking freely, the response of human vertical vibration acceleration and the load conditions of pedestrian overpasses cannot meet the requirements of normal use. Therefore, the vertical acceleration of the footbridge should be designed to reduce vibration. Under these two loading conditions, the lateral acceleration response meets the requirements of normal use. Originality/value On the basis of summarizing the research at home and abroad, the analysis of human-induced vibration is mainly considered from two aspects: frequency regulation and dynamic response control. The walking load models mainly include Fourier series model, self-excitation model, impulse model, stochastic model and more; the crowd load models are divided into groups: low-density crowd walking freely, high-density crowd flowing and more. Therefore, it is very important to calculate the structural vibration response in the design of long-span cable-supported footbridges under pedestrian excitation to meet comfort requirements.

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Optimum crossing cable system in multi-span cable-stayed bridges

Cited by 27 publications

References 28 publications

Optimum Design of Cable-Stayed Bridges Considering Cable Failure

Optimum Design of Cable-Stayed Bridges Considering Cable Failure

Hanger pre-tensioning force optimization of steel tied-arch bridges considering operational loads

Serviceability analysis of a cable-supported footbridge subjected to human-induced loads

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