Three-dimensional finite element modelling of long-span cable-stayed bridges

Asgari, B.; Osman, Siti Aminah; Adnan, Azlan

doi:10.1080/19373260.2013.832640

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…Part of this process also involved introducing spring elements for simulating axially rigid but transversally elastic shear behaviour of bearing deck-tower connections. Asgari et al [119] advocated manual methods over automatic processes for model updating because of improved accuracy. A manual, iterative sensitivity-based procedure was presented for updating six structural parameters of the 890 m-main span Tatara cable-stayed bridge.…”

Section: Model Updating Of Cable-stayed Bridgesmentioning

confidence: 99%

“…All vertical, lateral, and torsional results included in the study show good correlation. Asgari et al [119] modelled the Tatara Bridge and six mode frequencies were compared with vibration test results with a maximum difference of 4.5%. After model updating using a sensitivity-based iterative procedure, the maximum frequency difference was 4.4% (lower modes showed a 0.7-1.8% improvement), showing good correlation with test results.…”

Section: Single-girder Modelsmentioning

confidence: 99%

“…Concrete and steel material properties (Young's modulus and density) are the most common parameters chosen for updating along with bearing stiffness, mass of secondary dead load, and cable elastic modulus. Two multi-scale models [47,120] adopted the thickness of shell elements for simulating the deck as updating parameters, and three studies [98,117,119] considered the cross-sectional area of the deck as an updating parameter. Generally, material properties are targeted for updating as they cannot be known with certainty, unlike the physical dimensions of the bridge.…”

Section: Triple-girder Modelsmentioning

confidence: 99%

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Latest Advances in Finite Element Modelling and Model Updating of Cable-Stayed Bridges

et al. 2022

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As important links in the transport infrastructure system, cable-stayed bridges are among the most popular candidates for implementing structural health monitoring (SHM) technology. The primary aim of SHM for these bridges is to ensure their structural integrity and satisfactory performance by monitoring their behaviour over time. Finite element (FE) model updating is a well-recognised approach for SHM purposes, as an accurate model serves as a baseline reference for damage detection and long-term monitoring efforts. One of the many challenges is the development of the initial FE model that can accurately reflect the dynamic characteristics and the overall behaviour of a bridge. Given the size, slenderness, use of long cables, and high levels of structural redundancy, precise initial models of long-span cable-stayed bridges are desirable to better facilitate the model updating process and to improve the accuracy of the final updated model. To date, very few studies offer in-depth discussions on the modelling approaches for cable-stayed bridges and the methods used for model updating. As such, this article presents the latest advances in finite element modelling and model updating methods that have been widely adopted for cable-stayed bridges, through a critical literature review of existing research work. An overview of current SHM research is presented first, followed by a comprehensive review of finite element modelling of cable-stayed bridges, including modelling approaches of the deck girder and cables. A general overview of model updating methods is then given before reviewing the model updating applications to cable-stayed bridges. Finally, an evaluation of all available methods and assessment for future research outlook are presented to summarise the research achievements and current limitations in this field.

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Section: Model Updating Of Cable-stayed Bridgesmentioning

confidence: 99%

Section: Single-girder Modelsmentioning

confidence: 99%

Section: Triple-girder Modelsmentioning

confidence: 99%

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Latest Advances in Finite Element Modelling and Model Updating of Cable-Stayed Bridges

et al. 2022

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“…The rigid links (MPC184 elements) are extended from the axial centre of the pylon to the cable anchor points. The detailed FE modelling procedure is discussed in the previous research works of authors [ 28 , 29 ].…”

Section: Finite Element Modellingmentioning

confidence: 99%

A New Multiconstraint Method for Determining the Optimal Cable Stresses in Cable-Stayed Bridges

Asgari

Osman

Adnan

2014

The Scientific World Journal

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Cable-stayed bridges are one of the most popular types of long-span bridges. The structural behaviour of cable-stayed bridges is sensitive to the load distribution between the girder, pylons, and cables. The determination of pretensioning cable stresses is critical in the cable-stayed bridge design procedure. By finding the optimum stresses in cables, the load and moment distribution of the bridge can be improved. In recent years, different research works have studied iterative and modern methods to find optimum stresses of cables. However, most of the proposed methods have limitations in optimising the structural performance of cable-stayed bridges. This paper presents a multiconstraint optimisation method to specify the optimum cable forces in cable-stayed bridges. The proposed optimisation method produces less bending moments and stresses in the bridge members and requires shorter simulation time than other proposed methods. The results of comparative study show that the proposed method is more successful in restricting the deck and pylon displacements and providing uniform deck moment distribution than unit load method (ULM). The final design of cable-stayed bridges can be optimised considerably through proposed multiconstraint optimisation method.

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“…Long-span bridges, which are capable of crossing large valleys and rivers and possess aesthetic values, have been increasingly used with the development of construction technology and building materials [4,5]. In the seismic analysis of long-span bridges, it is reasonable and necessary to consider the variation of the earthquake excitations under different supports, due to long distance and soil condition change between supports [6,7].…”

Section: Introductionmentioning

confidence: 99%

Running safety assessment of a train traversing a three-tower cable-stayed bridge under spatially varying ground motion

et al. 2020

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To explore the influence of spatially varying ground motion on the dynamic behavior of a train passing through a three-tower cable-stayed bridge, a 3D traintrack-bridge coupled model is established for accurately simulating the train-bridge interaction under earthquake excitation, which is made up of a vehicle model built by multi-body dynamics, a track-bridge finite element model, and a 3D rolling wheel-rail contact model. A conditional simulation method, which takes into consideration the wave passage effect, incoherence effect, and site-response effect, is adopted to simulate the spatially varying ground motion under different soil conditions. The multi-time-step method previously proposed by the authors is also adopted to improve computational efficiency. The dynamic responses of the train running on a three-tower cablestayed bridge are calculated with differing earthquake excitations and train speeds. The results indicate that (1) the earthquake excitation significantly increases the responses of the train-bridge system, but at a design speed, all the running safety indices meet the code requirements; (2) the incoherence and site-response effects should also be considered in the seismic analysis for long-span bridges though there is no fixed pattern for determining their influences; (3) different train speeds that vary the vibration characteristics of the train-bridge system affect the vibration frequencies of the car body and bridge. Keywords Earthquake Á Spatially varying ground motion Á Long-span bridges Á Nonlinear wheel-rail contact Á Running safety

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Three-dimensional finite element modelling of long-span cable-stayed bridges

Cited by 6 publications

References 23 publications

Latest Advances in Finite Element Modelling and Model Updating of Cable-Stayed Bridges

Latest Advances in Finite Element Modelling and Model Updating of Cable-Stayed Bridges

A New Multiconstraint Method for Determining the Optimal Cable Stresses in Cable-Stayed Bridges

Running safety assessment of a train traversing a three-tower cable-stayed bridge under spatially varying ground motion

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