Technical Innovations of the Aizhai Bridge in China

Hu, Jianhua; Shen, Ruili

doi:10.1061/(asce)be.1943-5592.0000599

Cited by 12 publications

(4 citation statements)

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“…RB-TI in CMDAs is the deepening and extension of existing bridge engineering design and construction technologies, as well as the development of new technologies that may emerge in the future. According to the literature review, there are abundant achievements in RB-TI, which mainly focus on structural design [ 7 , 8 ], construction technology [ 9 , 10 ], maintenance [ 11 , 12 ], and intelligent construction [ 13 , 14 ], etc. However, few researchers have studied the management of TI in bridge projects during railway construction, and this has led to the low efficiency of TI.…”

Section: Introductionmentioning

confidence: 99%

Research on Modular Management of Railway Bridge Technology Innovation in Complex and Difficult Mountainous Areas

Chen

Cheng

Xie

et al. 2022

Computational Intelligence and Neuroscience

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With China’s government facilitating railway projects, more railway bridges (RBs) are gradually built in complex and difficult mountainous areas (CDMAs). The construction activities of RB in CMDAs are facing formidable challenges in terms of the natural environment, technology, and organization management, which are hardly solved by traditional bridge design and construction techniques. Therefore, there is an urgent need for technology innovation (TI). Studies on the management of RB-TI in CMDAs are limited. As such, this study aims to offer an effective modular management approach to RB-TI in CMDAs. A system of demand and obstacle factors for RB-TI in CMDAs was identified firstly based on the literature review and the grounded theory, including seven intermediate codings and 29 initial codings. Then these factors were regarded as the system requirements for modular decomposition, to establish a “cut-to-fit” modular management approach to RB-TI in CMDAs. A case (i.e., the LD bridge project of the CZ railway) was selected to demonstrate and validate the developed approach. The results show that the proposed approach can be applied to manage RB-TI in CMDAs. The innovation of this study lies in the integration of grounded theory and modular theory and provides modular management ideas and measures for bridge engineering technology innovation. Findings from this study enrich the knowledge body of RB-TI and guide innovation subjects in the practical management of RB-TI in CMDAs.

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Section: Introductionmentioning

confidence: 99%

Research on Modular Management of Railway Bridge Technology Innovation in Complex and Difficult Mountainous Areas

Chen

Cheng

Xie

et al. 2022

Computational Intelligence and Neuroscience

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“…In addition, a suspension bridge is proposed to adapt to the terrain, which fully uses the terrain to integrate with nature and improve the economy. The Aizhai Bridge (Hu and Shen 2014) is a pylon-girder detached suspension bridge used to connect with mountain tunnels on both sides of the bridge by shortening the stiffening girder. The Hutiaoxia Jinsha River Bridge (Yu et al, 2022) is a single-tower earth-anchored suspension bridge (STEASB) using a composite saddle to reduce the number of bridge towers and side spans.…”

Section: Introductionmentioning

confidence: 99%

Rock anchor hanger effect on single-tower earth-anchored suspension bridge mechanical performance: An analytical model and multi-objective golden eagle optimization

Chen,

Zhang

2024

Advances in Structural Engineering

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The application of a composite saddle in single-tower earth-anchored suspension bridges (STEASBs) replaces the tower on the steep slope side, which is a cost-effective solution that improves bridge safety and provides environmental protection for the steep bank slope of the valley. However, this novel bridge design needs an appropriate model to evaluate the effect of rock anchor hangers on the structure in the non-girder area and adjust their parameters to optimize the mechanical response of the whole bridge structure. This study proposes an approach to quickly evaluate the most unfavorable load cases of the STEASB and further optimizes the structural parameters of rock anchor hangers to enhance structural safety. An analytical model for the STEASBs under the live load is proposed and verified by the finite element model (FEM), with the maximum relative error not exceeding 7.37%. Combined with the golden eagle optimizer (GEO), the most unfavorable load cases of the corresponding design indices are yielded. The Pareto optimal solutions for the spacing, cross-sectional area, and initial tension of the vertical rock anchor hangers are obtained through multi-objective optimization to improve the mechanical behavior of STEASBs. In addition, it is clarified that the main function of rock anchor hangers is to reduce the peak value of the stress amplitude of the hangers and girder-end rotation, providing a theoretical basis for the STEASB design.

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“…Mature construction methods include the deck crane construction method [16], and the cable crane construction method, among others [8,9]. Rail cable shifting (RCS) is a new, recently invented method, and it was firstly used in the successful erection of the girder of the Aizhai Bridge [17][18][19][20][21][22][23]. The erection of the 1000.5-m steel truss girder required only two and a half months [16].…”

Section: Introductionmentioning

confidence: 99%

Form-Finding Analysis of the Rail Cable Shifting System of Long-Span Suspension Bridges

Pan

Yan

2018

Applied Sciences

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The determination of the non-loading condition of the rail cable shifting (RCS) system, which consists of the main cables, hangers, and rail cables, is the premise of girder erection for long-span suspension bridges. An analytical form-finding analysis model of the shifting system is established according to the basic assumptions of flexible cable structures. Herein, the rail cable is discretized into segmental linear cable elements and the main cable is discretized into segmental catenary elements. Moreover, the calculation and analysis equations of each member and their iterative solutions are derived by taking the elastic elongation of the sling into account. In addition, by taking the girder construction of the Aizhai suspension bridge as the engineering background, a global scale model of the RCS system is designed and manufactured. The test system and working conditions are also established. The comparison between the test results and analytical results shows the presented analytical method is correct and effective. The process is simplified in the analytical method, and the computational results and precision satisfy practical engineering requirements. In addition, the proposed method is suitable for application in the computation analysis of similar structures.

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Technical Innovations of the Aizhai Bridge in China

Cited by 12 publications

References 1 publication

Research on Modular Management of Railway Bridge Technology Innovation in Complex and Difficult Mountainous Areas

Research on Modular Management of Railway Bridge Technology Innovation in Complex and Difficult Mountainous Areas

Rock anchor hanger effect on single-tower earth-anchored suspension bridge mechanical performance: An analytical model and multi-objective golden eagle optimization

Form-Finding Analysis of the Rail Cable Shifting System of Long-Span Suspension Bridges

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