Nonlinear Stability Analysis on the Concrete Casting Step of Long-Span Concrete-Filled Steel Tube Arch Bridge

Wang, Ji; Zhang, Mingzhong; Guo, Xiao Li

doi:10.4028/www.scientific.net/msf.614.275

Cited by 2 publications

(2 citation statements)

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“…With the wide application of steel pipe concrete arch bridges, its forms of construction are becoming more diversified [1]. The span of the bridge has developed from just over 100 m in the beginning to nearly 600 m at present [2,3]. The design of a concrete-filled steel tube (CFST) arch bridge is usually guided via finite element simulation, and the use of a scaled model test can not only verify the mechanical performance of the structure, but also preview and evaluate the actual control of the construction.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Correcting the Deviation of a Middle Pier Tower of a Long-Span Intermediate Arch Bridge

Dong,

2023

Buildings

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To control the deviation of a long-span concrete-filled steel tube (CFST) arch bridge during construction monitoring, a practical method for controlling tower deviation is studied and established. The form of construction of this bridge is an intermediate double-arch bridge, which differs from conventional bridges, thus requiring the urgent resolution of the issue of unbalanced middle piers. Therefore, the mechanical characteristics and construction process of an intermediate long-span, dual-coupled steel pipe arch bridge are meticulously examined by using a 1:10 scale model, with particular focus on discussing the deflection of the buckle tower during the installation of the arch rib segments. Construction control is implemented using a novel tower deflection control method that addresses unilateral torsion problems and difficulties in controlling the deflection of the tower. The model results are compared with the finite element analysis output, demonstrating that this new approach can resolve unbalanced tower deviations by maintaining absolute values within 0.5 mm. After correcting these deviations, the measured results from the model bridge tower align with the calculated analytical results and even surpass the theoretical expectations for tower deviation. This remarkable new method accurately resolves real-world bridge tower deviations.

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Section: Introductionmentioning

confidence: 99%

A New Method for Correcting the Deviation of a Middle Pier Tower of a Long-Span Intermediate Arch Bridge

Dong,

2023

Buildings

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“…The most fatal weakness of this system is that its beams are hung directly from the suspendpoles [1] . However, the early concrete-filled steel tube arch bridge was limited to the construction technology level of the cable at that time, and cement mortar grouting technology was generally used to carry out anti-corrosion, resulting in severe corrosion of steel wire, so it had to be replaced after more than ten years of operation [2] . The service life of the sling is generally 15 to 20 years.…”

Section: Introductionmentioning

confidence: 99%

Archives of Civil Engineering

Zhang

Xue

et al. 2021

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Concrete-filled steel tube arch bridge is filled with concrete inside the steel tube. The radial constraint of the steel tube limits the expansion of the compression concrete, which makes the concrete in the three-way compression state, thus significantly improving the compressive strength of the concrete. At the same time, it can simplify the construction process and shorten the construction period. Since the rapid development of concretefilled steel tubular tied arch bridge in the 1990s, a large number of such Bridges have suffered from the defects of steel concrete, loose tie rod, and hanger rod rust, etc. Therefore, the reinforcement technology for various diseases has been studied, among which the reinforcement technology for hanger rod replacement is the most complicated and more difficult. As more and more bridges of this type enter the period of reinforcement, it ismore and more urgent to study the reinforcement technology of suspenders. Taking a bridge that has been in service for 23 years as an example, this paper discusses the construction method and construction monitoring of replacing the suspender, so as to guide the construction monitoring of the bridge. Finally, the construction monitoring results of the bridge are given, which can provide reference for the replacement of the suspender of this type of bridge

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Nonlinear Stability Analysis on the Concrete Casting Step of Long-Span Concrete-Filled Steel Tube Arch Bridge

Cited by 2 publications

References 1 publication

A New Method for Correcting the Deviation of a Middle Pier Tower of a Long-Span Intermediate Arch Bridge

A New Method for Correcting the Deviation of a Middle Pier Tower of a Long-Span Intermediate Arch Bridge

Archives of Civil Engineering

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