Research on Stress Improving Method of Bridge Deck in Negative Moment Zone of Steel-Concrete Composite Beam Bridge

2021 ◽  
Author(s):  
Jin-Xin Liu ◽  
Xiao-Wei Ma ◽  
Lei Yan ◽  
Chuan-Dong Shen ◽  
Xin Zhang
Keyword(s):  
Composite Beam ◽  
Bridge Deck ◽  
Negative Moment ◽  
Beam Bridge

Calculation methods of bridge deck for prestressed short rib T-beam bridges

2020 ◽  
pp. 1-13
Author(s):  
Sijia Wang ◽  
Tianlai Yu
Keyword(s):  
Finite Element ◽  
Bridge Deck ◽  
Mechanical Performance ◽  
Test Results ◽  
Analysis Method ◽  
Slab Method ◽  
Element Analysis ◽  
Calculation Results ◽  
Beam Bridge ◽  
T Beam

Because of the low height of the prestressed short rib T-beam bridge and the poor torsion resistance of the main beam, the positive moment in the middle span of the bridge deck will increase correspondingly compared with the normal rib beam bridge. At present, there is little research on the calculation method of the bridge deck of the prestressed short rib T-beam bridge. In this paper, the space finite element method and the continuous one-way slab method are used to calculate the forces on the bridge deck, based on the space finite element method, a finite element elastic supported continuous beam method is proposed to calculate the forces on the bridge deck. By comparing the calculation results of the three methods with the test results, the reasonable calculation method of the bridge deck is studied. The results show that the spatial finite element analysis method can simulate the mechanical performance of the deck of the bridge of the prestressed short rib T-beam bridge well, the stress calculation results are consistent with the test results, and the calculation accuracy is high, which can be used in the actual engineering design; The finite element analysis method of elastic support continuous beam can also simulate the mechanical performance of the deck of the bridge of the prestressed short rib T-beam bridge. The concept of the method is clear, the calculation is convenient, and it is more suitable for the application of engineering design; The calculation results of the continuous one-way slab method are too large to be safe for design.

On the use of steel-free concrete bridge decks in continuous span bridges

1999 ◽  
Vol 26 (5) ◽  
pp. 667-672 ◽  
Author(s):  
A A Mufti ◽  
J P Newhook
Keyword(s):  
Bridge Deck ◽  
Steel Reinforcement ◽  
Experimental Program ◽  
Concrete Bridge ◽  
Reinforced Polymers ◽  
Bridge Structures ◽  
Negative Moment ◽  
Fibre Reinforced Polymer ◽  
Concrete Bridge Deck ◽  
Negative Bending

This note discusses the use of the steel-free concrete bridge deck technology in continuous span bridge structures. Conventional slab-on-girder design often utilizes the longitudinal steel reinforcement in the deck to resist the negative bending moments created at the internal piers of continuous bridges. The steel-free bridge deck is devoid of all internal steel reinforcement and hence requires an alternate design approach which is presented in this note. A key aspect of this approach is the recommended use of fibre-reinforced polymer reinforcement to control cracking of the deck over the intermediate supports. Limiting these crack widths is essential to the durability performance of the concrete, particularly in freeze-thaw environments. The results of an experimental program are also reviewed. The tensile stresses from the global longitudinal negative moment are shown to have little effect on the punching behaviour of the slab. It is noted that the concepts presented in this note were utilized in the construction of a three-span highway bridge which incorporated the steel-free bridge deck technology.Key words: bridges, design, continuous span, concrete decks, punching-shear, fibre-reinforced polymers.

Research on CWR Design on Steel-Concrete Composite Beam Bridge in Alpine Region

2014 ◽  
Vol 587-589 ◽  
pp. 1708-1712
Author(s):  
Wei Long Sun ◽  
Feng Han
Keyword(s):  
Temperature Stress ◽  
Composite Beam ◽  
Calculation Model ◽  
Alpine Region ◽  
Bridge Pier ◽  
Distribution Law ◽  
Key Techniques ◽  
Beam Bridge ◽  
Broken Gap

In this paper, take one steel-concrete composite beam bridge in alpine region as the research object, by using the calculation model of “line-bridge-pier”integration, research the distribution law of rail additional contractility, deflection force and values of broken gap when rail is breaking. Propose the key techniques of laying temperature stress CWR on composite beam bridge, which will have great significance in guiding the design of similar projects.

Research Status of FRP-Concrete Composite Beam/Bridge Deck Systems

2014 ◽  
Vol 587-589 ◽  
pp. 1424-1429 ◽  
Author(s):  
Li Hua Yang
Keyword(s):  
Composite Beam ◽  
Civil Engineering ◽  
High Strength ◽  
Bridge Engineering ◽  
Fiber Reinforced Polymer ◽  
Future Research ◽  
Research Status ◽  
Reinforced Polymer ◽  
Composite Form ◽  
Beam Bridge

Fiber reinforced polymer (FRP) has widely used in civil engineering due to their high strength-to-weight, high stiffness-to-weight ratios, and corrosion resistance. To solve the corrosion of the reinforcing steel in the bridge engineering and reduce the initial cost, FRP-concrete composite structure has been considered as the most effective composite form. A detailed research status survey of FRP-concrete composite beam/deck systems and their construction applications in civil engineering is presented. Several problems in future research are put forward.

Research on Key Issues in Design of Outer-Plated Steel-Concrete Continuous Composite Beams

2012 ◽  
Vol 166-169 ◽  
pp. 414-419
Author(s):  
Li Hua Chen ◽  
Fei Xiao ◽  
Qi Liang Jin
Keyword(s):  
Composite Beam ◽  
Bending Moment ◽  
Longitudinal Shear ◽  
Structural Features ◽  
Composite Beams ◽  
Steel Beam ◽  
Negative Moment ◽  
Key Issues ◽  
Negative Bending ◽  
The Moment

Based on the theoretical analysis and testing results, some key issues in design of outer-plated steel-concrete continuous composite beams are discussed. The influence of the form of steel beam upper flange on the behavior of composite beam is analyzed. The requirements about longitudinal reinforcement strength in the concrete flange of the negative moment region are given. It is suggested that the moment-shear interaction should be neglected when calculating the flexural capacity of outer-plated steel-concrete composite beams under negative bending moment. The behavior of longitudinal shear resistance at the interface between the concrete flange and web of composite beam is studied, and the related calculating formula is put forward based on the structural features of the composite beam.

Model Test Research on the Concrete Creep and Shrinkage Effects on the Long-Time Deflection of Steel Concrete Composite Beam

2013 ◽  
Vol 351-352 ◽  
pp. 1061-1065
Author(s):  
Shi Bo Zhang
Keyword(s):  
Model Test ◽  
Composite Beam ◽  
Effective Modulus ◽  
Test Model ◽  
Concrete Creep ◽  
Material Theory ◽  
Long Time ◽  
Beam Bridge ◽  
Creep And Shrinkage

This paper presents a model test research on long-term deflection of prestressed steel-concrete composite beams caused by creep and shrinkage effects of concrete. The model is designed based on a 20.8m length segment of a service composite beam bridge in Guangzhou. Geometric scale between the model and prototype is 1:8. Long-term deflection of the test model was obtained through 300 days of uninterrupted test. In addition, using the CEB-FIP (1990) criterion, effective modulus of concrete was calculated considering the effect of the concrete creep and shrinkage. Uniform the effective modulus of concrete to the modulus of steel, the value of structures time varying stiffness was calculated with single material theory and the relationship between stiffness and deflection by introducing stiffness adjustment coefficients was established, then the value of deflection changing with time was calculated.

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