Uncertainty effects on lifetime structural performance of cable-stayed bridges

This study is related to the FRP-concrete composite bridge deck for cable-stayed bridges developed by the Korea Institute of Construction Technology since 2007. This deck disposes a FRP panel at the bottom and is orthotropic owing to its fabrication through pultrusion process. In the cable-stayed bridge applying precast deck, support conditions occur at the cross beam and edge girder. Therefore, need is to verify the performances in the longitudinal and transverse directions when applying the orthotropic deck to cable-stayed bridges. Accordingly, specimens enabling to verify the performance in each direction are fabricated and subject to structural performance test. Based on the test results, the serviceability and applicability of the FRP-concrete composite deck to cable-stayed bridges are evaluated.

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Structural Performance and Strength Prediction of Steel-to-Concrete Box Girder Deck Transition Zone of Hybrid Steel-Concrete Cable-Stayed Bridges

Journal of Bridge Engineering ◽

10.1061/(asce)be.1943-5592.0000958 ◽

2016 ◽

Vol 21 (11) ◽

pp. 04016083 ◽

Cited By ~ 8

Author(s):

Xi Cheng ◽

Xin Nie ◽

Jiansheng Fan

Keyword(s):

Transition Zone ◽

Structural Performance ◽

Strength Prediction ◽

Box Girder ◽

Concrete Box Girder ◽

Cable Stayed Bridges

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Optimization of Pre-Tensioning Cable Forces in Highly Redundant Cable-Stayed Bridges

International Journal of Structural Stability and Dynamics ◽

10.1142/s0219455415400052 ◽

2015 ◽

Vol 15 (01) ◽

pp. 1540005 ◽

Cited By ~ 7

Author(s):

Banafsheh Asgari ◽

Siti Aminah Osman ◽

Azlan Bin Adnan

Keyword(s):

Structural Performance ◽

Fe Model ◽

Optimization Strategy ◽

Unit Load ◽

Long Span Bridges ◽

Long Span ◽

Moment Distribution ◽

Unit Load Method ◽

Cable Forces ◽

Cable Stayed Bridges

Cable-stayed bridges have been developing rapidly in the last decade and have become one of the most popular types of long-span bridges. One of the important issues in the design and analysis of cable-stayed bridges is determining the pre-tensioning cable forces that optimize the structural performance of the bridge. Appropriate pre-tensioning cable forces improve the damaging effect of unbalanced loading due to the deck dead load. Because the cable-stayed structure is a highly undetermined system, there is no unique solution for directly calculating the initial cable forces. Numerous studies have been conducted on the specification of cable pre-tensioning forces for cable-stayed bridges. However, most of the proposed methods are limited in their ability to optimize the structural performance. This paper presents an effective multi-constraint optimization strategy for cable-stayed bridges based on the application of an inverse problem through unit load method (ULM). The proposed method results in less stresses in the bridge members, more stability and a shorter simulation time than the existing approaches. The finite element (FE) model of the Tatara Bridge in Japan is considered in this study. The results show that the proposed method successfully restricts the pylon displacement and establishes a uniform deck moment distribution in the simulated cable-stayed bridge; thus, it might be a useful tool for designing other long-span cable-stayed bridges.

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