Numerical assessment of effective width in steel-concrete composite box girder bridges

2020 ◽  
pp. 136943322097174 ◽  
Author(s):  
Renato Silva Nicoletti ◽  
Alexandre Rossi ◽  
Alex Sander Clemente de Souza ◽  
Carlos Humberto Martins
Keyword(s):  
Cross Section ◽  
Specific Recommendation ◽  
Effective Width ◽  
Technical Standards ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Transversal Section ◽  
Numerical Assessment ◽  
Girder Bridge

The present paper aims to determine numerically in the Abaqus® software the parameters that have the greatest influence on the effective width of steel-concrete composite box girder bridges. In the technical standards and in the literature, there is no specific recommendation for calculating the effective width in steel-concrete composite box girder bridge. As an alternative, the existing recommendations for steel-concrete composite I-girders are adopted. Therefore, in the absence of standards recommendations for steel-concrete composite box girder bridges, there is a need for an investigation into the distribution of stresses at the steel-concrete interface, because if the effective width was admitted incorrectly, may result in costly or even unsafe solutions. For this purpose, the effective numerical width of 160 models of steel-concrete composite box girder bridges was determined, in which the study variables were the configuration of the transversal section, the slab height, the span length and the elements arrangement in the cross section. After analyzing the results, it was proposed a recommendation to determine effective width of steel-concrete composite box girder bridges.

Effect of diaphragms on stress reduction in box girder bridge sections

1988 ◽  
Vol 15 (1) ◽  
pp. 127-135 ◽  
Author(s):  
A. H. Siddiqui ◽  
S. F. Ng
Keyword(s):  
Cross Section ◽  
Stress Reduction ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Loading Tests ◽  
The Cross ◽  
Girder Bridge ◽  
Determine Effect

The purpose of this study is to examine the effect of rigid diaphragms in reducing warping and distortion stresses developed in box girders due to deformation of the cross section. Tests were conducted for two Plexiglas box girder models to determine effect of diaphragms on the behaviour of box girder sections. The results of the tests were compared with values obtained from the so-called “beam on elastic foundation (BEF) analogy,” an analytical procedure that permits the calculation of warping and distortion stresses in box sections due to deformation of the cross section.Each box girder model was tested as a simply supported beam with a 1168.4 mm (46 in.) span. Six separate loading positions were used for each of the three predesigned diaphragm spacings. Thus, 18 separate loading tests were conducted for each model in order to obtain sufficient data to determine the amount of reduction in both warping and distortion stresses. Test measurements included the applied load, deflections, and strains at various locations on the webs and bottom flanges.The results indicate that deformation of a box girder cross section due to eccentric loading may cause substantial warping and distortion stresses, and that these stresses can be effectively controlled by judicious installation of rigid diaphragms along the span of the girder. Also, experimental warping and distortion stresses obtained from both tests compare reasonably well with those predicted by the BEF analogy. Key words: warping, torsional, stresses, deformations, box girder bridges, diaphragms.

Numerical assessment of effective width in steel-concrete composite box girder bridges with partial interaction

2021 ◽  
Vol 239 ◽  
pp. 112333
Author(s):  
Renato Silva Nicoletti ◽  
Alexandre Rossi ◽  
Alex Sander Clemente de Souza ◽  
Carlos Humberto Martins
Keyword(s):  
Effective Width ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Numerical Assessment ◽  
Partial Interaction

Study on Crack Causes and Strengthening Measures of Large Span PC Continuous Box Girder Bridges

2010 ◽  
Vol 163-167 ◽  
pp. 3551-3554
Author(s):  
Wei Peng ◽  
Zhi Xiang Zha
Keyword(s):  
Prestressed Concrete ◽  
Load Test ◽  
Box Girder Bridges ◽  
Element Analysis ◽  
Box Girder ◽  
Girder Bridges ◽  
Long Span ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge ◽  
Engineering Projects

This template Based on cracks observation and finite element analysis of real engineering projects as well as bridge load test after reinforcement, causes and types of cracks in prestressed concrete box girder bridges and treating measurements are systematically studied. The results obtained from the calculation are presented to demonstrate the effect of sensitive factors, such as arrangement of longitudinal prestressed tendons, the magnitude of vertical prestressed force, temperature gradient, etc. The results show that the arrangement of longitudinal prestressed tendons and the magnitude of vertical prestressed force take key roles in cracks control of box girder webs. Lots of treating measurements are presented in accordance with different types of cracks, some of them are applied to a reinforcement engineering of a long span pretressed concrete continuous box girder bridge with cracks. Load test after reinforcement of the bridge demonstrates the reasonability of the treating measurements. Several design recommendations and construction measures about reinforcements and some sensitive factors mentioned above are proposed to control cracks.

Assessment and identification of concrete box-girder bridges

2019 ◽  
Author(s):  
Edward A. Baron
Keyword(s):  
Neural Network ◽  
Health Monitoring ◽  
Concrete Bridge ◽  
Fe Model ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Damage Scenarios ◽  
Girder Bridges ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge

<p>This work consists in identify and assess the properties related to material, geometry and physic sources, in a pre-stressed concrete bridge through a surrogate model. The use of this mathematical model allows to generate a relationship between bridge properties and its dynamic response, with the purpose to develop a tool to predict the analytical values of the studied properties from measured eigenfrequencies. Therefore, it is introduced the identification of damage scenarios, giving the application for validate the generated metamodel (Artificial Neural Network). A FE model is developed to simulate the studied structure, a Colombian bridge called "El Tablazo", one of the higher in the country of this type (box-girder bridge). Once the damage scenarios are defined, this work allows to indicate the basis for futures plans of structural health monitoring.</p>

Installation Technology of Webs in the Construction of PC Box-Girder Bridge with Corrugated Steel Webs

2012 ◽  
Vol 204-208 ◽  
pp. 2209-2213 ◽  
Author(s):  
Ya Jiang Du ◽  
Bing Wen Yang ◽  
Shui Wan
Keyword(s):  
Prestressed Concrete ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Section Shape ◽  
Out Of Plane ◽  
Box Girder Bridge ◽  
Corrugated Steel Web ◽  
Girder Bridge ◽  
Installation Technology

In the construction of prestressed concrete(PC) box-girder bridge with corrugated steel webs used cast-in-place cantilever method, the key component-corrugated steel webs are fabricated in factory first and then transported to the construction site. Because of the low out-of plane stiffness, corrugated steel webs are easy to deform in the construction, which brings many difficulties for construction. The precision of installing the corrugated steel web has a direct effect on the cross-section shape of the box-girder. So it is a key step to monitor the orientation and installation of corrugated steel web during construction. Based on the experience of some PC box-girder bridges with corrugated steel webs having been built, a method to control the installation accuracy of corrugated steel webs is proposed and some quality assurance measures are introduced in order to ensure the accuracy, reliability and security of the installation of corrugated steel web. The method can be taken as a reference in the construction of this kind of bridge.

Intermediate Diaphragms Arrangement in Horizontal Curved Composite Box-Girder Bridge with Corrugated Webs

2011 ◽  
Vol 94-96 ◽  
pp. 326-331
Author(s):  
Jun He ◽  
Bin Han ◽  
Yu Qing Liu ◽  
Ai Rong Chen
Keyword(s):  
Normal Stress ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Initial Curvature ◽  
Horizontally Curved ◽  
Girder Bridges ◽  
Torsion Effect ◽  
Corrugated Webs ◽  
Parametric Studies ◽  
Girder Bridge

Horizontally curved box girder bridges inherently exhibit complex torsional and distortional behavior as well as bending due to the initial curvature. As to the horizontal curved composite box-girder bridges with corrugated webs, diaphragms were arranged reasonably to reduce torsional and distortion effect for safety and stability due to the coupling of bending and torsion effect for initial curvature and reduced bending stiffness in horizontal direction for corrugated steel webs. Finite element models for a 3-spans continuous horizontal curved composite box girder bridges with corrugated webs were established. Comparing the ratio of warping normal stress to bending normal stress, the influence of the number and spacing for diaphragms on distortion control for curved bridges is investigated. Extensive parametric studies (including central angle, the aspect ratio of the box section, the spacing of the intermediate diaphragms)are performed and the design suggestions for the maximum spacing of the intermediate diaphragms are presented.

Externally Prestressed Steel Box Girder Bridge

2012 ◽  
Vol 178-181 ◽  
pp. 2209-2212
Author(s):  
Jing Nan Yang ◽  
Xiong Jun He ◽  
Xiao Cheng Yang
Keyword(s):  
Practical Case ◽  
Small Cross Section ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Bridge Span ◽  
External Prestressing ◽  
Steel Box Girder ◽  
Girder Bridge ◽  
Steel Box Girder Bridge

With a small cross section, a light deadweight and a convenient replaceable tendon, externally prestressed bridges have many special traits compared with other bridges. With a practical case, this paper analyzes the design of externally prestressed steel box girder bridges, which contains the bridge span, beam construction, externally prestressed layout, substructure and construction programs. Through economic, social analysis, discusses the prospects for the application of external prestressing structure .

scholarly journals Parametric Analysis of Single-Cell Box Girder Bridge

2021 ◽  
Vol 1197 (1) ◽  
pp. 012047
Author(s):  
R. Manjula ◽  
A. Amrutha
Keyword(s):  
Cost Saving ◽  
Parametric Analysis ◽  
Shear Force ◽  
Paper Analysis ◽  
Bending Moments ◽  
Box Girders ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Girder Bridge

Abstract Bridges based on box girders concept are extensively utilized for their cost saving solution for different passages & viaducts that are seen in the present day highway systems. The behavior of box girder bridges is analyzed for stresses in longitudinal and transverse directions. In this paper, analysis of three different box girders has been carried out using SAP2000 as per Indian Road Congress(IRC) provisions for rectangular and trapezoidal sections. The behaviors of box girders with uniform depth and varying widths have been analyzed. A parametric study is conducted for various parameters like bending moments, axial force & shear force using SAP2000.

Estimation of Structural Safety for Internally Grouted Post-tensioned External Tendons

2017 ◽  
Author(s):  
Yeun Chul Park ◽  
Ho-Kyung Kim ◽  
Chul-Hwan Yoo ◽  
Suk-Hee Bong
Keyword(s):  
South Korea ◽  
Structural Safety ◽  
Draft Guideline ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
External Tendons ◽  
Medium Risk ◽  
Box Girder Bridge ◽  
Girder Bridge

In February, 2016, one of the external tendons in pre‐stressed concrete (PSC) box girder bridge in Seoul was failed due to corrosion after 17 years of service. The failure was found during the thawing season regular inspection. Since it was the first tendon failure occurred in South Korea, in‐depth investigation was performed and found that multiple tendons were corroded at many different locations. Seoul City had been preparing for the maintenance of PSC box girder bridges, but the draft maintenance guideline considered overall condition of the bridge and little attention was paid to the condition of tendons. The bridge was evaluated as per the draft guideline and rated as ‘Medium Risk’ although one external tendon was failed. The indices for the evaluation should be properly weighted to prevent failure of tendons.

Design Innovation of Large-Span Pre-Stressed Concrete Box Girder Bridge with Corrugated Steel Web

2011 ◽  
Vol 243-249 ◽  
pp. 1682-1688
Author(s):  
Guang Hui Li ◽  
Jian Xun Zhang
Keyword(s):  
Yellow River ◽  
Design Code ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Shear Buckling ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Corrugated Steel Web ◽  
Girder Bridge

More and more pre-stressed concrete box-girder bridges with corrugated steel web are being realized in the world due to their advantages over the traditional concrete box girder bridges. Characteristics of corrugated steel web technology were introduced briefly in this paper, and its application in Juancheng Yellow River Bridge was also presented. Calculations on the shear buckling strength of corrugated steel web for Juancheng Yellow River Bridge were performed by the use of design code of Japan. Based on the analysis results, a reasonable way to determine the sizes of corrugated steel web is proposed, and it will provide help for designers when performing a design of pre-stressed box girder with corrugated steel web in China.

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