Partial Elastic Scheme Method in Cantilever Construction of Concrete Arch Bridges

Granata, Michele Fabio; Margiotta, Piercarlo; Recupero, Antonino; Arici, Marcello

doi:10.1061/(asce)be.1943-5592.0000396

Cited by 28 publications

(8 citation statements)

References 14 publications

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“…Currently, there is no cantilever cast reinforced concrete arch bridge of such a large scale in China, so there are no precedents to refer. As the segment is long and heavy in the cantilever casting construction of the arch bridge, [29][30][31][32][33][34] a new type of triangle truss form traveler (hereinafter referred to as the form traveler) is proposed. The form traveler mainly consists of the bearing system of the main truss, the stay cable, the C-type hook, and the walking track.…”

Section: Structural Arrangement Of the New Triangle Truss Type Form Travelermentioning

confidence: 99%

Structural analysis and improvement for a new form traveler in long-span cantilever-casting arch bridge

Zhou

et al. 2021

Advances in Mechanical Engineering

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A form traveler used in bridge construction has a great influence on the safety of the performance and alignment of bridges. As a cantilever casting segment of a bridge becomes longer and heavier, the traditional form traveler may not meet the strength and stiffness requirements, and there is a risk of collapse. This study has devised a new triangle truss form traveler and investigated the performance based on the Ye-Lang Lake arch bridge in China. Firstly, the numerical models of the form traveler were established to get the strength and stiffness index of the form traveler used for the arch Segment 2. Subsequently, the improvement scheme of the mechanical properties of the form traveler has been proposed. Then the partial refined numerical analysis model of the C-type hook has been established, a finite element model, and a design scheme for improving partial structures of the C-type hook was proposed. Finally, the field load test was carried out to verify the reliability of the new form traveler. The test results show that the improvement of the new form traveler is effective.

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Section: Structural Arrangement Of the New Triangle Truss Type Form Travelermentioning

confidence: 99%

Structural analysis and improvement for a new form traveler in long-span cantilever-casting arch bridge

Zhou

et al. 2021

Advances in Mechanical Engineering

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“…For girder bridges the influence of the bendingshear interaction on the final safety level of these structures can be significant, added to the modifications of the stress state given by time-dependent phenomena like creep and shrinkage [25,29]. Moreover, the strong interaction between bending, shear, and axial force always has to be evaluated in arch bridge structures, especially when they are built with complex construction sequences, by suspended cantilevers [30] or lattice cantilevers [31].…”

Section: Advances In Civil Engineeringmentioning

confidence: 99%

Bending-Shear Interaction Domains for Externally Prestressed Concrete Girders

Recupero

Granata

2013

Advances in Civil Engineering

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In prestressed concrete structures, the evaluation of the safety level is generally carried out by separating the bending moment strength and the shear force capacity. Actually interaction between bending moment (M) and shear force (V) can have significant consequences on evaluations in service life, especially when the ultimate limit state (ULS) is considered. In this paper, the M-V interaction is addressed for prestressed concrete girders, in the cases of both bonded and unbonded prestressing tendons. It can be demonstrated, by drawing the interaction domains (M-V), that a significant reduction of the safety level has to be considered when shear force is evaluated together with bending moment on the ULS of the cross-section, especially for external prestressing in concrete T-shaped or box sections of bridge girders. Interaction domains allow designers to evaluate and optimize reinforcement ratios, geometric properties of the beam, and effects of shear on the ultimate state. An analytical model, based on the stress field theory, is developed and proposed in this paper. A numerical example is developed and interaction domains are given for an example of a box section with variation in reinforcement ratio and tendon slope. A validation of the presented model is given, by comparing experimental data in the literature with results found using the proposed analytical approach.

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“…e system of linear equations of desired moments was established for each DOF, and the initial cable force was then determined directly by this system. In addition, it is also possible to obtain the desired geometric shape of the arch at the end of construction to solve the initial cable force; for example, Granata et al [23] used the partial elastic scheme method to obtain the initial cable force of cantilever casting concrete arch bridge. Tian et al [24] used stress balance and influence matrix methods to determine the initial cable force of concrete arch bridge.…”

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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Partial Elastic Scheme Method in Cantilever Construction of Concrete Arch Bridges

Cited by 28 publications

References 14 publications

Structural analysis and improvement for a new form traveler in long-span cantilever-casting arch bridge

Structural analysis and improvement for a new form traveler in long-span cantilever-casting arch bridge

Bending-Shear Interaction Domains for Externally Prestressed Concrete Girders

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

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