Mechanical Behavior and Structural Optimization of Steel-Concrete Composite Cable-Pylon Anchor

XIAO Lin; LIU Lifang; WEI Xing; LIU Dejun

doi:10.3969/j.issn.0258-2724.20170320

Volume 54 Issue 5

Oct. 2019

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Journal of Southwest Jiaotong University > 2019 > 54(5): 923-930, 944.

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XIAO Lin, LIU Lifang, WEI Xing, LIU Dejun. Mechanical Behavior and Structural Optimization of Steel-Concrete Composite Cable-Pylon Anchor[J]. Journal of Southwest Jiaotong University, 2019, 54(5): 923-930, 944. doi: 10.3969/j.issn.0258-2724.20170320

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Mechanical Behavior and Structural Optimization of Steel-Concrete Composite Cable-Pylon Anchor

doi: 10.3969/j.issn.0258-2724.20170320

XIAO Lin^1
,,
LIU Lifang¹,
WEI Xing^{1
,
,},
LIU Dejun²

Received Date: 21 Apr 2017
Rev Recd Date: 28 May 2018

Available Online: 21 Dec 2018

Publish Date: 01 Oct 2019

Abstract

Abstract

Full-size model test and nonlinear finite element analysis (FEA) are carried out to investigate the mechanical behavior and optimize the structure design of the steel-concrete composite cable-pylon anchor of Jiayue Bridge, Chongqing. The mechanical performance and load transfer mechanism of the steel-concrete composite cable-pylon anchor are studied first by the model test comparing with the nonlinear FEA. Then, the optimized structural parameters of the composite cable-pylon anchor are analyzed by FEA. Results show that the stresses of components of cable-pylon anchor are on a low level and distribute evenly. The relative slippage between anchor box and concrete pylon is small, and the maximum value is only 0.029 mm. The stiffness of shear connectors has a great impact on the principle stress of concrete pylon. When the stiffness is increased by 5 times, the principle stress of concrete pylon is reduced by 17.3%. The cable-pylon anchor’s structural design of Jiayue Bridge meet the requirement of safety and economics.
- cable-stayed bridge with low pylons,
- cable-pylon anchor,
- steel-concrete composite structure,
- model test,
- mechanical behavior,
- optimization analysis

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References

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