Optimization of cable pre-tension forces in long-span cable-stayed bridges considering the counterweight

Song, Chaolin; Xiao, Rucheng; Sun, Bin

doi:10.1016/j.engstruct.2018.06.061

Cited by 46 publications

(21 citation statements)

References 18 publications

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“…Sometimes the reasonable finish state cannot be achieved by adjusting the cable force alone; the counterweight is used to work together with cable pretension forces [4]. For example, in long-span cablestayed bridges, the side spans often use concrete beams that are heavier than the midspan steel box girder or add extra counterweights to balance the self-weight of the main span [5]. Besides, curved bridges [1] or special-shaped bridges [2,3] which are asymmetrical across the bridge direction, counterweights are often used to control the asymmetric effect of the structure in the transverse direction.…”

Section: Introductionmentioning

confidence: 99%

“…Lee et al [20] took into account the influence of the counterweights but did not involve the calculation of the counterweights. Song et al [5] took a long-span cable-stayed bridge as an example, assumed that the side span counterweights was a continuous uniform load, and used the hillclimbing algorithm to calculate the bridge cable force considering the counterweights.…”

Section: Introductionmentioning

confidence: 99%

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Multiobjective Optimization of Cable Forces and Counterweights for Universal Cable-Stayed Bridges

Wang

Zhang

et al. 2021

Journal of Advanced Transportation

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In cable-stayed bridges, especially asymmetric bridges, counterweights are always made to work together with cable pretension forces to get a reasonable finished state. To solve the optimization problem of the cable-stayed bridge considering the counterweights, the integrated optimization method (IOM) for estimating cable forces and counterweights is proposed. In this method, the counterweights are proposed to act on the anchor points. After that, the summary of the minimum weighted total bending energy and the summary of the counterweights are considered as two objective functions of a multiobjective problem. Finally, the dynamic weighted coefficient method is used to solve this problem and realize the Pareto solution set. IOM presents detailed procedures in a simple numerical model and is then applied to the Yong-ding special-shaped cable-stayed bridge. The results show that not only IOM can realize the priority selection of the loading position of the counterweights but also get a better reasonable finish state because of the introduction of the counterweight dimension; the dynamic weighted coefficient method can quickly find the Pareto optimal solution set and be further screened by decision-makers; counterweight is very helpful to reduce torsion and other spatial effects in cable-stayed bridges. IOM can be used as a universal optimization method for cable-stayed bridges.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiobjective Optimization of Cable Forces and Counterweights for Universal Cable-Stayed Bridges

Wang

Zhang

et al. 2021

Journal of Advanced Transportation

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“…Fabbrocino et al [10] developed a procedure for the optimization of cable force in order to achieve the desired bending moment distribution through the application of a self-equilibrated state of stress induced by the optimum pretensioning cable force. Song et al [11] proposed an optimization method to determine the pretensioning cable force in a long-span bridge considering the counterweight. Li et al [12] determined the initial cable force of long-span concrete-filled steel tube (CFST) arch bridge based on influence matrix and linear programming methods.…”

Section: Introductionmentioning

confidence: 99%

Linear Control Method for Arch Ring of Oblique‐Stayed Buckle Cantilever Pouring Reinforced Concrete Arch Bridge

Liu

Zhou

et al. 2021

Advances in Civil Engineering

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Yelang Lake Bridge is the largest cantilevered single-chamber reinforced concrete arch bridge in China, with a net span of 210 m. In this article, an equation for positioning the height of the formwork before pouring of the arch ring segment was derived, which was suitable for the construction control of the long-span reinforced concrete arch bridge such as the Yelang Lake Bridge. The arch ring segment elevation calculation equation was derived under the two typical working conditions that the concrete pouring of the arch ring segment is completed and the buckle cable and anchor cable tensioning are completed. In addition, two typical working conditions of arch ring segment concrete pouring and cable tensioning were evaluated. Then, a new type of cradle and loading test of the cradle, which meet the requirements of the long segment pouring of the arch ring, were introduced. Finally, the measurement deviation during the construction of the arch segment was analyzed. The linear control results of the arch ring showed that the arch ring segment elevation calculation formula could effectively ensure the accuracy of the arch ring segment construction process under the two typical conditions of completion of concrete pouring of the arch ring segment and completion of the buckle and anchor cable tensioning. The maximum deviation is only 3.1 mm. The line shape after the completion of the arch ring construction was in good agreement with the target line shape, and the deviation between the measured value and the target value was only 2.5 cm, which met the engineering requirements.

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“…Increasing the counterweights leads to an increase in the axial forces in the girder greatly, and so may results in the stability problem. Further increases in the tower height are not conducive to the stiffness of the towers, displacement at the top of main towers, and structural stiffness, and the costs of maintaining suitable stiffness of the towers may become prohibitive (Li, 2006;Song et al, 2018;Vairo, 2010;Wang et al, 2018;Zhang and Xia, 2011).…”

Section: Introductionmentioning

confidence: 99%

Conceptual design of a new type of single-tower cable-stayed arch bridge and study of its mechanical properties

Xie

Huang

2021

Advances in Structural Engineering

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In order to overcome the apparent characteristics as a flexible structure of a long-span single-tower cable-stayed bridge and the excessive axial force of the main girder, and to exert the advantages of cable-stayed arch cooperative system bridges, this paper proposes a new type of single-tower cable-stayed arch cooperative system bridge. On the premise of the same amount of steel, the new cooperative system bridge can have a greater stiffness than the existing cable-stayed arch cooperative system bridge with the same span. The new system bridge uses the main girder as the rigid tie bar to balance the arches’ thrusts, which enables the main girder to have a smaller axial force and makes the cable-stayed arch cooperative system bridge a thrustless structure. The proposed bridge is assembled by the following method: (a) constructing a cable-stayed bridge with a steel box girder to bear part of the dead load and to act as a construction platform firstly; (b) then installing arch structures and fixing they with the girder to bear the remaining dead load; and, (c) adding web members between the arch ribs and the girder to form a variable-height truss structure with the arch ribs as the upper chords and the girder as a lower chord to bear most of the live load at last. The underlying mechanical principles were explained, and the mechanical properties of the cooperative system bridges were calculated with the finite element method in this paper. The stiffness and axial forces in the girders are analyzed by the finite element method and compared with those of the conventional bridges. The FEA results show that the new cooperative system bridge has the truss structure’s characteristics, which shows apparent advantages of stiffness and much smaller axial force in the main girder.

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Optimization of cable pre-tension forces in long-span cable-stayed bridges considering the counterweight

Cited by 46 publications

References 18 publications

Multiobjective Optimization of Cable Forces and Counterweights for Universal Cable-Stayed Bridges

Multiobjective Optimization of Cable Forces and Counterweights for Universal Cable-Stayed Bridges

Linear Control Method for Arch Ring of Oblique‐Stayed Buckle Cantilever Pouring Reinforced Concrete Arch Bridge

Conceptual design of a new type of single-tower cable-stayed arch bridge and study of its mechanical properties

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