Negative Angle Vertical Rotating Construction Method of Reinforced Concrete Arch Bridge

Li, Wenwu; Cai-liang, Huang; Tang, Chunyan

doi:10.2749/222137917x14881937844847

Cited by 7 publications

(8 citation statements)

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“…After the building procedure of the upper rotating table, back wall, and main arch, the weight of the main arch structure is not transferred to the position of the upper spherical joint [6]. The buckle cable and pulling cable are anchored alternately (Figure 5a), and are able to gradually transfer the weight of each part to the spherical joint position.…”

Section: Objective Of Cable Tensionmentioning

confidence: 99%

“…Several bridges have been built using rotating construction worldwide [5]. In recent decades, in order to reduce the impact on existing railway lines or municipal facilities, as well as cross valleys and other complex topographical sites, rotating construction has been widely utilized [6,7]. Consequently, the structure of the swing bridge rotating system has characteristics of large mass and ultra-long cantilevers.…”

Section: Introductionmentioning

confidence: 99%

“…Buildings 2022, 12, x FOR PEER REVIEW 2 of 17 has been widely utilized [6,7]. Consequently, the structure of the swing bridge rotating system has characteristics of large mass and ultra-long cantilevers.…”

Section: Introductionmentioning

confidence: 99%

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Central Load-Bearing Control in the Construction Process of the Concrete Spherical Joint Nandu River Swing Bridge: A Case Study

2022

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The rotating mechanism is a significant procedure in swing bridges. In this paper, the Nandu River swing bridge is taken as an engineering case study to exhibit the critical technology of the monitoring process and the construction method of the swing bridge. The research focuses on the central load-bearing control system used to guarantee the security of the construction process. The mechanical problems during the construction process are discussed. Simultaneously, the cable tension and gravity center test are introduced. The non-Hertz contact theory is utilized to calculate the stress distribution of the spherical joint. Furthermore, the overturning moment is computed to monitor the stability of the rotating system based on the stress distribution calculation of the spherical joint. The monitoring process of central load-bearing control is entirely exhibited and discussed. Concurrently, the calculating result of the real-time overturning moment reflects the stability of the rotating construction process, and adjustments are made to ensure the safety of construction. The results show that, during the cable tension process, the middle position of the main arch exhibited 162.3 mm maximum vertical displacement. Meanwhile, the fraction moment was greatly larger than the unbalanced moment. Furthermore, the maximum overturning moment value was 2094.38 kN·m, which was smaller than the resistance of the overturning moment. The present research demonstrates that the non-Hertz contact theory fits the calculation of spherical joint stress distribution. Simultaneously, the middle position of the main arch should be monitored to control the vertical displacement at the cable tensioning stages. The gravity center test and stability control of the rotating construction are the key steps to reaching central load-bearing control.

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Section: Objective Of Cable Tensionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Central Load-Bearing Control in the Construction Process of the Concrete Spherical Joint Nandu River Swing Bridge: A Case Study

2022

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“…Ma et al [13] simulated the rotating structure in three dimensions of a concrete-filled steel tube concrete basket arch bridge, and the most unfavorable stress conditions were determined. Li et al [14,15] studied a negative angle vertical rotating construction method in China and analyzed the vertical pouring, rotation, closure process, and other key construction processes. Also, he proposed a dynamic unstressed FEM to simulate bridge construction of vertical rotation through the whole rotation process.…”

Section: Introductionmentioning

confidence: 99%

Analysis on Mechanical Behavior of Relay Vertical Rotation for Steel Arch Tower

Zhou

Xie

et al. 2023

Advances in Civil Engineering

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The vertical rotation method is a special option for steel tower construction in fabricated bridge. The tall tower is prefabricated on the ground and then pulled to its designed position using steel wires. Traditional vertical rotation method always uses a taller temporary structure to provide an upward pull force to lift the rotation member; however, the temporary structure would spend much time, cost, and work high above the ground. For instance, the Jinwu Bridge tower’s weight was so heavy that the ordinary rotating method was not feasible. Therefore, a relay traction system with two auxiliary struts was employed to rotate the tower. The chief strut was first rotated to an inclined angle of 60° by an assistant strut to decrease the lateral component force of tension. Then, the tower was pulled from horizontal to vertical by the chief strut. Furthermore, a numerical model was established to analyze the mechanical behavior of the inner force, stress, and deformation of the chief strut, assistant strut, and tower. The study identified critical conditions such as the reverse of axial force for the assistant strut, intervention of back cables, and release of cable tension. The relay traction system effectively reduced initial pulling stress, spending less cost and time. Besides, the analysis method can be an innovate reference for other vertical rotating projects.

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“…With various end constraints, Lee and Jeong [34] studied the natural frequencies and mode shapes of curved beams. Li et al [35] presented the key procedure and constructional details of the negative angle vertical rotating construction method on the CRC bridge constructed in China that was Pearl Bridge.…”

Section: Introductionmentioning

confidence: 99%

Behavior of Laminated Reinforced Concrete Curved Beam with Changing Concrete Properties

2019

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Strengthening and upgrading the performance reinforced concrete curved structures for functional purpose as well as for conversation of architectural aesthetic aspect is the main concern for engineers. In the present study, four full-scale experimental Curved Reinforced Concrete (CRC) beams conducted. The cross-section of all CRC beams was T-section. The parametric studies are carried out to investigate the effect of time of casting segmental layers (web and flange) and the compressive strength of concrete on the structural behavior of such structures. Three values of compressive strength of concrete used in this study, these are (25, 50, 75 MPa). The control specimen casting as one unit with the compressive strength of concrete was 25 MPa. The present outcomes showed that the increase in the compressive strength of concrete up to 75 MPa of the flange zone plays a significant role in raising the ultimate capacity by 22.86% and reducing the deflection by 61.43% in the quarter span as compared with control specimen. Additionally, the trend and distribution of cracks, mode of failure, and strain response of CRC specimens are briefly discussed in this study.

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Negative Angle Vertical Rotating Construction Method of Reinforced Concrete Arch Bridge

Cited by 7 publications

References 0 publications

Central Load-Bearing Control in the Construction Process of the Concrete Spherical Joint Nandu River Swing Bridge: A Case Study

Central Load-Bearing Control in the Construction Process of the Concrete Spherical Joint Nandu River Swing Bridge: A Case Study

Analysis on Mechanical Behavior of Relay Vertical Rotation for Steel Arch Tower

Behavior of Laminated Reinforced Concrete Curved Beam with Changing Concrete Properties

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