Analysis and monitoring on jacking construction of continuous box girder bridge

Li, Fang-Yuan; Wu, Peifeng; Yan, Xiangqiao

doi:10.12989/cac.2015.16.1.049

Cited by 16 publications

(8 citation statements)

References 7 publications

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“…e orenfeldt hardening model provided by the software is adopted for the compression model. e compressive strengths of the concrete column and the girdling beam are 28.5 MPa and 31.7 MPa, respectively, according to a real engineering project [11,12]. e tensile model adopts the ideal failure model, and the input parameter is the 2.01 MPa tensile strength of concrete.…”

Section: Materials Properties Of the Concrete Elementmentioning

confidence: 99%

“…e girdling beam is a common form of jacking support system, it is also an important component as the role of force system conversion in the process of jacking, the stress condition of the girder under load is very complex, and its structure safety is directly related to the safety of the whole bridge jacking process [10][11][12]. At present, there are a few studies on the structural performance of girdling beams, and the solutions to some problems are only based on experience or refer to other related projects [13].…”

Section: Introductionmentioning

confidence: 99%

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Numerical Analysis of the Structural Properties of Girdling Beam for a Square Column Used in Bridge Jacking Construction

Zhang¹,

2022

Mathematical Problems in Engineering

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As a key connecting structure of jacking construction, the load capacity of the girdling beam determines the safety of the jacking construction of bridges. The square cross-sectional column was held by the action of the girdling beam for jacking construction of the bridge and was studied with nonlinear analysis of its structural properties at different girdling heights, with different construction modes including integral cast and two-stage cast. The results, including the interface stress and internal stress, column, and girdling beam deformation and destruction features, were presented. The mechanical characteristics of girdling beam for the square column were summarized with the spatial strut-and-tie model. It has been proven that the slip failure mode of girdling beams is a kind of brittle failure that must have enough load resistance to ensure the safety of jacking construction.

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Section: Materials Properties Of the Concrete Elementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Structural Properties of Girdling Beam for a Square Column Used in Bridge Jacking Construction

Zhang¹,

2022

Mathematical Problems in Engineering

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“…Te standard method of bearing replacement is to jack up the main girder, transfer the load from the bearing to a jack, subsequently replace the bearing, and ultimately transfer the load from the jack back to the bearing by dropping the girder [3]. Te synchronization of the vertical displacement of each girder is an essential indicator in monitoring operations to prevent any potential harm to the main girder during construction [4].…”

Section: Introductionmentioning

confidence: 99%

Fast Extraction Algorithm of Planar Targets Based on Point Cloud Data for Monitoring the Synchronization of Bridge Jacking Displacements

Liang,

Zhang,

Zhang

et al. 2024

Structural Control and Health Monitoring

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Transverse synchronization of vertical displacements of all jacking-up points is an important monitoring indicator to replace bearings in assembled multigirder bridges during the jacking phase. Currently, using target paper to identify the 3D coordinates of control points reduces the complexity of monitoring operations and improves the stability of data precision. However, the existing planar target locating methods have low accuracy, inefficiency, and subjectivity, which seriously hinders the construction process of bearing replacement. Accurately obtaining the center coordinates of multiple targets from a point cloud in a short monitoring period remains a challenge. This study proposes a high-precision automated algorithm to extract target center points in low-density point clouds to quickly calculate real target center points. First, we construct a standard point cloud model of the target papers for scanning, including color and geometric features. Then, we extract the measured point cloud of the typical jacking operation phase based on the reflection intensity and size information. Next, we map the intensity values of the measured point cloud into the color channel and register the measured point cloud with its standard point cloud model using the normal vector estimation and colored ICP algorithms. Finally, we extract the center point of the measured targets. Numerical experiments and engineering test results show that the proposed method converges quickly with high precision and good robustness, which saves 91.4% of the time compared with the traditional method. In general, this research can provide effective technical support for 3D laser scanning in monitoring the operation phase of bridge jacking.

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“…Bridge construction methods can be divided into many types, including cantilever construction (basket construction method), support construction, hoisting construction, jacking construction method, rotation construction, etc [1][2][3]. Bridge construction methods are usually chosen based on factors such as local topography, bridge usage, and construction costs.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation Analysis of Steel Truss Arch Bridge Jacking Construction

Zheng,

Li,

Zhang

2023

CEJ

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In this study, a spatial model of a steel truss arch bridge was established using the finite element software Midas/Civil to simulate and analyze the jacking construction process. The stress performance of the guide beam and main structure at each jacking stage was obtained. The results showed that in the first stage of jacking, the maximum stress and deflection values of the main girder were observed. The maximum stress on the upper edge of the main girder was 34.9MPa, and on the lower edge, it was -60.4MPa. The maximum deflection was -35.88mm. The maximum stress in the guide beam occurred during the jacking process and was -53.2MPa, corresponding to the cross-section at the root of the guide beam. The maximum deflection of the guide beam occurred in the maximum cantilever state and was -30.79mm. During the arch rib jacking process, the maximum stress was -49.4MPa. Both the maximum stress and deflection values were within the allowable range, indicating that the structure was in a safe state. This study provides a reference for similar bridge jacking construction projects.

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Analysis and monitoring on jacking construction of continuous box girder bridge

Cited by 16 publications

References 7 publications

Numerical Analysis of the Structural Properties of Girdling Beam for a Square Column Used in Bridge Jacking Construction

Numerical Analysis of the Structural Properties of Girdling Beam for a Square Column Used in Bridge Jacking Construction

Fast Extraction Algorithm of Planar Targets Based on Point Cloud Data for Monitoring the Synchronization of Bridge Jacking Displacements

Finite Element Simulation Analysis of Steel Truss Arch Bridge Jacking Construction

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