A New Widening Method of Reinforced Concrete Box Girder and its Experimental Research

2010 ◽  
Vol 163-167 ◽  
pp. 3724-3729
Author(s):  
Qian Wang ◽  
Lei Shi ◽  
Zhe Zhang
Keyword(s):  
Mechanical Properties ◽  
Reinforced Concrete ◽  
Experimental Research ◽  
Model Test ◽  
Full Scale ◽  
Scale Model ◽  
Box Girder ◽  
Concrete Box Girder

This paper introduces a new box girder widening method- Steel cantilever widening concrete box girder method without piers (SCWCGM for short). Without additional piers, SCWCGM can still meet the need of widening range, which is an effective widening method for urban bridges. In this paper, the widening conception and the structure style of SCWCGM is detailed. In order to study the mechanical properties of this method, the full-scale model test was conducted. The results show that, the SCWCGM is reasonable and feasible.

scholarly journals Segmental Intelligent Model Test of Box Girder Bridge Strengthened By a Cable-Stayed System by Mathematical Calculation

2021 ◽  
Vol 2083 (4) ◽  
pp. 042051
Author(s):  
Xianggang Wang ◽  
Yongli Shen ◽  
Yongcheng Yang ◽  
Xinxin Zhou ◽  
Gangnian Xu ◽  
...  
Keyword(s):  
Model Test ◽  
Yellow River ◽  
Scale Model ◽  
Highway Bridge ◽  
Test Results ◽  
Box Girder ◽  
Concrete Box Girder ◽  
Girder Bridge ◽  
Main Girder ◽  
Intelligent Model

Abstract Dongming Yellow River Highway Bridge is an important super large bridge across the Yellow River on national highway 106. In order to effectively improve the cracking and deflection of the bridge, the cable-stayed system is used to reinforce the main girder of the project. In order to analyze the stress state of joist, bracket and box girder, the static loading of cable is carried out through scale model test to study the mechanical properties of concrete box girder segment, joist and bracket, verify the reliability of bracket and concrete box girder anchorage, and optimize the reinforcement method of cable-stayed system according to the test results.

Research on CFRP External Pre Stress Reinforcing Vertical Crack of Box Girder Roof

2014 ◽  
Vol 668-669 ◽  
pp. 236-239
Author(s):  
Xin Zhong Wang
Keyword(s):  
Mechanical Properties ◽  
Crack Width ◽  
Longitudinal Crack ◽  
Design Model ◽  
Vertical Crack ◽  
Box Girder ◽  
External Reinforcement ◽  
Reinforcement Efficiency ◽  
Concrete Box Girder ◽  
Reinforcement Model

the article is about longitudinal crack of concrete box girder roof, and it designed a reinforcement model. As the pre stressed material, CFRP could reach 30% of reinforcement efficiency under different loads in design model through external reinforcement upon calculation and analysis. And its crack width greatly reduces. In this way, the reinforcement purpose could be realized, and the mechanical properties of CFRP concrete could be fully played. The effect is obvious.

scholarly journals FULL-SCALE MODEL TEST ON THE APPLICABILITY OF L-SHAPED GEOSYNTHETIC DRAIN SYSTEM TO TERRE ARMÉE WALL AGAINST HEAVY RAINFALL

2013 ◽  
Vol 28 (0) ◽  
pp. 353-360
Author(s):  
Je-Min BAEK ◽  
Satoru SHIBUYA ◽  
Jin-Suk HUR ◽  
Takefumi OGATA ◽  
Byeong-Su KIM ◽  
...  
Keyword(s):  
Model Test ◽  
Heavy Rainfall ◽  
Full Scale ◽  
Scale Model

A materially nonlinear finite element model for the analysis of curved reinforced concrete box-girder bridges

1993 ◽  
Vol 20 (5) ◽  
pp. 754-759 ◽  
Author(s):  
S. F. Ng ◽  
M. S. Cheung ◽  
J. Q. Zhao
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Element Model ◽  
Nonlinear Material ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges

A layered finite element model with material nonlinearity is developed to trace the nonlinear response of horizontally curved reinforced concrete box-girder bridges. Concrete is treated as an orthotropic nonlinear material and reinforcement is modeled as an elastoplastic strain-hardening material. Due to the fact that the flanges and webs of the structure are much different both in configuration and in the state of stresses, two types of facet shell elements, namely, the triangular generalized conforming element and the rectangular nonconforming element, are adopted to model them separately. A numerical example of a multi-cell box-girder bridge is given and the results are compared favourably with the experimental results previously obtained. Key words: finite element method, curved box-girder bridges, reinforced concrete, nonlinear analysis.

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