Analysis the same Continuous Girder Bridge Based on Different Construction Methods

2013 ◽  
Vol 361-363 ◽  
pp. 1319-1324
Author(s):  
Meng Ying Liu ◽  
Yue Xu
Keyword(s):  
Finite Element ◽  
Prestressed Concrete ◽  
Action Effects ◽  
Construction Methods ◽  
Calculation Results ◽  
Continuous Girder Bridge ◽  
The Difference ◽  
Girder Bridge

As the object to a prestressed concrete continuous girder bridge, which is an actual bridge, finite element modes were established respectively for the same actual bridge in different construction methods. The calculation results were analyzed comparatively and then the difference of the design results between the two construction methods was discussed in the gravity of structures, combination for action effects and the reinforcement bars, in order to accumulate useful experience in designing bridges.

Analysis of Continuous Girder Bridge Based on Different Codes

2013 ◽  
Vol 361-363 ◽  
pp. 1311-1314
Author(s):  
Meng Ying Liu ◽  
Bang Zhe Liu
Keyword(s):  
Finite Element ◽  
Comparative Analysis ◽  
Girder Bridges ◽  
Calculation Results ◽  
Continuous Girder Bridge ◽  
The Difference ◽  
Girder Bridge

As the object to continuous girder bridges of movable formwork construction,for the same real bridge according to the new code and old code respectively establish finite element mode and for the corresponding calculation and checked, through the comparative analysis about construct materials, calculation conditions and the calculation results, etc,to discuss the difference of the design results between the new standard and the old standard, in order to accumulated useful experience about designing new bridge and reinforcing and reforming old bridge.

Based on the Different Specifications of Jacking Construction of Continuous Girder Bridge Reliability Analysis

2014 ◽  
Vol 584-586 ◽  
pp. 2017-2022
Author(s):  
Jian Kang Shen
Keyword(s):  
Reliability Analysis ◽  
Cross Section ◽  
Prestressed Concrete ◽  
Reliability Index ◽  
Element Model ◽  
Construction Stage ◽  
Calculation Results ◽  
Continuous Girder Bridge ◽  
Bridge Reliability ◽  
Girder Bridge

The purpose of this paper is aimed at according to the "highway reinforced concrete and prestressed concrete bridge and culvert design specifications (JTG D62-2004) and (JTJ 023-85) design of jacking construction of continuous girder bridge for reliability analysis. By establishing a finite element model of construction stage and into a bridge stage respectively the reliability index of the typical cross section is analyzed. Aiming at construction stage, by choosing typical cross section of reliability analysis, draw a cross section of reliability index with the change of construction stage. Calculation results show that, according to JTG D62-2004 specification of reliability index calculation results than based on results of calculating the JTJ 023-85 specification. In this paper, the analysis results can provide reference for pushing the construction of the continuous girder bridge design.

scholarly journals Determination of dynamic impact factor for continuous girder bridge due to vehicle braking force by finite element method and experimental

2017 ◽  
Vol 39 (2) ◽  
pp. 149-164
Author(s):  
Nguyen Xuan Toan ◽  
Tran Van Duc
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Impact Factors ◽  
Dynamic Impact ◽  
Bending Vibration ◽  
Continuous Girder Bridge ◽  
Reaction Forces ◽  
Girder Bridge ◽  
Dynamic Impact Factor ◽  
Element Method

In this study, the finite element method (FEM) is used to investigate the dynamic response of continuous girder bridge due to moving three-axle vehicle . Vertical reaction forces of axles that change with time make bending vibration of girder significantly  increase. The braking in the first span is able to create response in other spans. In addition, the dynamic impact factors are investigated by both FEM and experiment for Hoa Xuan bridge. The results of this study provide an improved understanding of the bridge dynamic behavior and can be used as additional references for bridge codes by practicing engineers.

Prestressed Concrete Continuous Girder Bridge Reinforcement Simulation Analysis and Carrying Capacity Assessment

2012 ◽  
Vol 594-597 ◽  
pp. 1516-1521
Author(s):  
Ling Yu ◽  
Tie Zhu Qiao ◽  
Long Sheng Bao ◽  
Guang Shan Zhu
Keyword(s):  
Compressive Stress ◽  
Cross Section ◽  
Prestressed Concrete ◽  
Carrying Capacity ◽  
Simulation Analysis ◽  
Tension Stress ◽  
Reinforced Concrete Structure ◽  
Standard Requirement ◽  
Continuous Girder Bridge ◽  
Girder Bridge

This article simulates prestressed concrete continuous girder bridge reinforced many times and evaluates carrying capacity after reinforcement. Taking the FuFeng bridge for an example, we analyze the bridge’s stress state in using by Midas software, evaluate the concrete ability of crack resistance, check the reinforced concrete structure ultimate carrying capacity, the cracking resistance and the stiffness, assess reinforcement effect and verify the accuracy and reliability of the simulation results. The maximum main compressive stress, maximum compressive stress, maximal main tensile stress and maximum tension stress of mid-span cross-section of the bridge are 1.6Mpa, 1.6Mpa, 0.3~0.5Mpa, and -1.2Mpa respectively, the mid-span center cross-section of deflection is 2.89cm. Reinforcement suppresses the development and expansion of the crack; the mid-span deflection tends to stabilize; the ultimate bearing capacity meets the Standard requirement basically; the emergency capacity is not enough; and the car whose weight over 55 tons is prohibited from passing.

scholarly journals INITIAL STRESS CORRECTION METHOD FOR THE MODELING OF FOLDED SPACE INFLATABLE STRUCTURES

Aviation ◽  
2014 ◽  
Vol 18 (4) ◽  
pp. 166-173 ◽  
Author(s):  
Yanan Zhan ◽  
Li Yu ◽  
Xue Yang ◽  
Han Cheng
Keyword(s):  
Finite Element ◽  
Initial Stress ◽  
Control Volume ◽  
Technical Problem ◽  
Correction Method ◽  
Numerical Calculations ◽  
Inflatable Structures ◽  
Initial Errors ◽  
Calculation Results ◽  
The Difference

Initial errors and mesh distortions are inevitable in the modelling of folded space inflatable structures. Aimed at this key technical problem, an initial stress correction method based on finite element theory is proposed in this paper. First, initial stress is calculated through the difference of mapping and reference configurations, the former with initial errors and the later without. Then the initial stress is imposed on the mapping configuration to correct initial errors. Through the correction, the accuracy of the inflation deployment numerical calculation is greatly improved. In order to validate the reliability of this correction method, a typical space inflatable structure-inflatable tube is studied as an example. First of all, the finite element models of both Z-folded and rolled tubes are established with the initial stress correction method. Then the inflation deployment numerical calculations of the folded tubes are carried out applying the segmented inflatable control volume method. Through comparative analysis of the calculation results with and without a correction, the method proposed in this paper is proved to be feasible and accurate. The correction method is a complement to the modelling of folded space inflatable structures and it has a great significance for the improvement of the accuracy of the inflation deployment numerical calculations of space inflatable structures.

Thermal Stresses Simulation Analysis of Concrete Box Water Bridge under the Solar Radiation

2011 ◽  
Vol 255-260 ◽  
pp. 952-956
Author(s):  
Jian Ping Sun ◽  
Jian Ping Chen ◽  
Gang Li
Keyword(s):  
Finite Element ◽  
Tensile Strength ◽  
Solar Radiation ◽  
Thermal Stresses ◽  
Simulation Analysis ◽  
Water Bridge ◽  
Finite Element Software ◽  
Steel Bar ◽  
Calculation Results ◽  
The Difference

The reasons why the producing of the difference in temperature distributing and thermal stresses of box aqueduct under solar radiation are analyzed. The difference in temperature distributing and thermal stresses are effectively simulated by the finite element software ANSYS.The calculation results indicate that concrete box aqueduct body inter-surface whatever along the longitudinal and transverse will produce considerable thermal stresses under solar radiation, and its value has exceeded the design of concrete tensile strength. Therefore, the thermal stresses under the solar radiation must be considered in the design of box aqueduct body structural. We should appropriately configure temperature reinforcing steel bar.

Procedure Inversion Effect Analysis of Final System Transformation of Prestressed Concrete Continuous Girder Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1323-1327
Author(s):  
Xu Luo ◽  
Lu Rong Cai
Keyword(s):  
Stress Distribution ◽  
Prestressed Concrete ◽  
Steel Beams ◽  
System Transformation ◽  
Box Girder ◽  
Pull Out ◽  
Temporary Support ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Prestressing Loss

When the cantilever construction is adopted by the prestressed concrete continuous girder bridge, the order of two key procedures between removing temporary support and tensing remanent prestressed cable is used to be ignored. In order to study the influence of procedure inversion, the influences on bridge shape, stress distribution and prestressing loss were calculated for one common prestressed continuous concrete box girder bridge by MIDAS CIVIL 2006, respectively. The obtained result presents that: the influence on the bridge shape and the prestressing loss are not apparent, but the influence on the stress distribution is serious; the maximal compressive stress of procedure inversion is more 42.3% than common construction procedure only by tensing the remaining steel beams at box girder; especially, the combining area between the box girder and temporary support is easy to pull out. So, the procedure inversion construction method cant be accepted.

scholarly journals Moment redistribution in continuous prestressed concrete box girder with corrugated steel webs

2019 ◽  
Author(s):  
Jin-Sheng Du ◽  
Pui-Lam Ng ◽  
Xiang Ma ◽  
Jian Wang
Keyword(s):  
Experimental Data ◽  
Finite Element ◽  
Prestressed Concrete ◽  
Concrete Strength ◽  
Bending Moment ◽  
Element Model ◽  
Box Girder ◽  
Moment Redistribution ◽  
Calculation Results ◽  
The Moment

A fibre-finite-element model of continuous prestressed concrete (PC) composite box girder with corrugated steel webs is established with force-based elements using OpenSees. After the model is validated with existing experimental data, the effects of reinforcement index in upper and lower flanges, effective prestress and concrete strength on the moment redistribution behaviour is analysed. It is shown that increasing the reinforcement index in lower flange or effective prestress can increase the amount of bending moment redistribution, whereas increasing the concrete strength or reinforcement index in upper flange can decrease the amount of bending moment redistribution. By inspecting the sensitivity of parameters, it is found that the reinforcement index in lower flange has the most significant influence on the moment redistribution, followed by the concrete strength and then by the effective prestress, while the reinforcement index in upper flange has only little impact on the moment redistribution. The calculation results are compared with the existing formulas. Finally, a moment redistribution formula is proposed for continuous PC box girder with corrugated steel webs.

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