Research on the Application of Horizontal Rotation Construction Method with Flat Hinge in Cable-Stayed Bridge Construction

Sun, Quan Sheng; Guo, Xiao; Zhang, De Ping; Guan, Xi Kun; Zheng, Yu

doi:10.4028/www.scientific.net/amr.255-260.856

Cited by 13 publications

(3 citation statements)

References 2 publications

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“…As the core structure of the swivel bridge, the spherical hinge structure mainly includes upper spherical hinges, lower spherical hinges, and related components [7,8]. During the rotation process of the bridge, the upper and lower contact surfaces of the spherical hinge structure freely engage and rotate relative to each other under traction [9,10].…”

Section: Introductionmentioning

confidence: 99%

Friction Characteristics and Lubrication Properties of Spherical Hinge Structure of Swivel Bridge

Li,

Guo,

Huang

et al. 2024

Lubricants

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A spherical hinge structure is a key swivel bridge element that must be considered when evaluating friction characteristics and lubrication properties to meet the rotation requirement. Polytetrafluoroethylene (PTFE)-based spherical hinge sliders and lubrication coating have been employed for over 20 years, but with the growing tonnage of swivel bridge construction, their capacity to accommodate the required lubrication properties can be exceeded. In this manuscript, the optimal friction coefficient of the spherical hinge is obtained through the finite element analysis method. Four lubrication coatings and four spherical hinge sliders are prepared and tested through a self-developed rotation friction coefficient test, four-ball machine test, dynamic shear rheological test, and compression and shear performance test to evaluate the lubrication and friction properties of the spherical hinge structure. The results of the finite element analysis show that the optimum rotation friction coefficient of the spherical hinge structure is 0.031–1.131. The test results illustrate that the friction coefficient, wear scar diameter, maximum non-seize load, phase transition point, and thixotropic ring area of graphene lubrication coating are 0.065, 0.79 mm, 426 N, 14.6%, and 64,878 Pa/s. The graphene lubrication coating has different degrees of improvement compared with conventional polytetrafluoroethylene lubrication coating, showing more excellent lubrication properties, bearing capacity, thixotropy, and structural strength. Compressive and shear tests demonstrate that polyether ether ketone (PEEK) has good compressive and shear mechanical properties. The maximum compressive stress of PEEK is 87.7% higher than conventional PTFE, and the shear strength of PEEK is 6.07 times higher than that of PTFE. The research results can provide significantly greater wear resistance and a lower friction coefficient of the spherical hinge structure, leading to lower traction energy consumption and ensuring smooth and precise bridge rotation.

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Section: Introductionmentioning

confidence: 99%

Friction Characteristics and Lubrication Properties of Spherical Hinge Structure of Swivel Bridge

Li,

Guo,

Huang

et al. 2024

Lubricants

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“…After decades of development and improvement, it has been successfully applied to hundreds of bridges throughout the world, including North America, Austria, Europe, and Asian countries. This method is especially suitable for arch bridge 8,9 , cablestayed bridge [10][11][12][13] , continuous girder bridge 14 and so on 15-18. It was first invented as a pontoon bridge for military use during World War II Statistical studies 19 have shown that the SRM method has been widely used in various bridge types after years of development. Especially after 2000, it ushered in a qualitative leap, the continuous expansion of the rotating tonnage, and even exceeded 30,000 tons in 2018 (Tangshan Erhuan Road swivel cable-stayed bridge, 33000t).…”

Section: Introductionmentioning

confidence: 99%

Research on the Critical Technique of Synchronous Rotation Construction With Large Angle for T-shape Curve Rigid Frame Bridge

Shao

Duan

Yang³

2021

Preprint

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The superstructure rotation method (SRM) can optimize bridge construction in terms of reducing impacts on traffic, safety, and overall budget. This paper focuses on the key scientific problems of synchronous rotation construction with large angles and takes two T-shaped rigid frame bridges of the Wuyi Expressway over the Chengdu-Kunming Railway as the engineering background. Construction technologies of this project are introduced, including the installation process of spherical hinges, the design of the traction system, and the precision control method. Finite element models of the full-bridge were established to obtain the lateral unbalanced moment of the structure and the test method of the longitudinal unbalanced moment is shown in detail. Furthermore, the key parameters of SRM are analyzed and calculated, including the derivation and modification of the existing static friction coefficient calculation formula of the spherical hinge. Based on the measured data, the accuracy of different friction coefficient prediction formulas is evaluated.

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“…The construction period of a swivel bridge is relatively long. The construction of the beam and pier column needs to be carried out after the installation of the spherical hinge, so the swivel bridge does not start to rotate immediately, and the waiting time generally is several months or one or two years [10][11][12]. During the period of waiting time, there is generally water seepage in the foundation pit.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Moisture Damage Prevention of a Spherical Hinge Structure of a Swivel Bridge

Guo

Wang³

et al. 2020

Coatings

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As a key component of a swivel bridge, the spherical hinge is a steel-concrete structure, which is susceptible to moisture damage during waiting time. In this paper, spherical hinge moisture damage prevention is investigated comprehensively from two aspects of impermeable concrete and steel-concrete interface waterproof coating. Three impermeable concretes were prepared and tested by the compressive strength test, splitting tensile test, four-point bending test and the impermeability test. The test results illustrated that addition of cementitious capillary crystalline active masterbatch (CCCAM) and polypropylene fiber (PP) could improve the toughness and brittleness of concrete. The addition of CCCAM was an effective technique for improving the permeability of concrete. However, the incorporation of PP and CCCAM at the same time cannot improve the impermeability of concrete. This may be because the chaotic support structure formed by PP prevents the infiltration and uniform dispersion of CCCAM. A waterproof coating consolidation performance test was proposed to quantify the interface bond strength of waterproof coatings and assess the impact of temperature, moisture and freeze-thawing cycles on consolidation performance of waterproof coatings. The test results showed that temperature had a significant effect on the interface consolidation property of waterproof coatings and the optimal dosage of SBS modified asphalt (SBS), polyurethane (PLT) and unsaturated polyester resin (UPLS) waterproof coating is 1.18kg/m2, 0.95kg/m2 and 1.15kg/m2, respectively. Moreover, it was found that PLS waterproof coating maintained excellent properties in complex environment. This is because PLS has excellent shear strength and rubber characteristics, and it can form a hard–soft–hard transition layer between the concrete and steel, reducing the impact of environmental factors.

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Research on the Application of Horizontal Rotation Construction Method with Flat Hinge in Cable-Stayed Bridge Construction

Cited by 13 publications

References 2 publications

Friction Characteristics and Lubrication Properties of Spherical Hinge Structure of Swivel Bridge

Friction Characteristics and Lubrication Properties of Spherical Hinge Structure of Swivel Bridge

Research on the Critical Technique of Synchronous Rotation Construction With Large Angle for T-shape Curve Rigid Frame Bridge

Investigation on Moisture Damage Prevention of a Spherical Hinge Structure of a Swivel Bridge

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