Theoretical study on the nonlinear performance of single-box multi-cell composite box-girder with corrugated steel webs under pure torsion

2021 ◽  
Vol 178 ◽  
pp. 106487
Author(s):  
Yingbo Zhu ◽  
Shui Wan ◽  
Kongjian Shen ◽  
Peng Zhou ◽  
Xiao Wang
Keyword(s):  
Theoretical Study ◽  
Pure Torsion ◽  
Box Girder ◽  
Nonlinear Performance

Diaphragms in skew box girder bridges

1988 ◽  
Vol 15 (5) ◽  
pp. 869-878 ◽  
Author(s):  
Walter H. Dilger ◽  
Gamal A. Ghoneim ◽  
Gamil S. Tadros
Keyword(s):  
Key Words ◽  
Prestressed Concrete ◽  
Theoretical Study ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Skew Bridges ◽  
Internal Forces

A theoretical study of the effect of diaphragms on the reactions, internal forces, and behaviour of skew box girder bridges was carried out. Three different cases were studied: (1) the traditional skew diaphragms, (2) orthogonal diaphragms, and (3) no diaphragms. The aim of the study was to compare the different cases and to find out whether the easier to construct arrangements (2) and (3) would be viable options for design of skew box girder bridges. Key words: skew bridges, box girder, diaphragms, orthagonal, prestressed concrete.

Modified rotating-angle softened truss model for composite box-girder with corrugated steel webs under pure torsion

2020 ◽  
Vol 23 (9) ◽  
pp. 1902-1921 ◽  
Author(s):  
Yingbo Zhu ◽  
Shui Wan ◽  
Kongjian Shen ◽  
Qiang Su ◽  
Xiayuan Li
Keyword(s):  
Torsional Stiffness ◽  
Pure Torsion ◽  
Torsional Deformation ◽  
Box Girder ◽  
Torsional Response ◽  
Truss Model ◽  
Strain Relationship ◽  
Corrugated Steel Web ◽  
Accuracy Of Prediction ◽  
Good Agreement

Replacement of traditional concrete webs with corrugated steel webs will lead to a significant decrease in torsional stiffness of composite box-girder with corrugated steel webs, which needs special attention in the design of wide and curved composite box-girder with corrugated steel webs. To improve the accuracy of prediction on the entire torsional performance of composite box-girder with corrugated steel webs, a modified rotating-angle softened truss model for torsion is developed in this study. Modified rotating-angle softened truss model for torsion mainly takes into account the new three-stage average stress coefficients, the new two-stage shear strain relationship between corrugated steel web and slabs, and the torsional deformation coordination of whole cross section. To testify the accuracy of modified rotating-angle softened truss model for torsion and to better understand the performance of composite box-girder with corrugated steel webs under pure torsion, two scaled specimens are tested in this article. The torque–twist curves and shear strains calculated by modified rotating-angle softened truss model for torsion reach a good agreement with experimental results, which indicates that modified rotating-angle softened truss model for torsion can successfully predict the entire torsional performance of composite box-girder with corrugated steel webs. In addition, compared with test data obtained from previous literature, the proposed modified rotating-angle softened truss model for torsion is more capable of predicting full torsional response of composite box-girder with corrugated steel webs than other rotating-angle models, especially at cracking stage and ultimate stage.

Simulation of Accordion Effect of I-Girder with Corrugated Steel Webs

2013 ◽  
Vol 284-287 ◽  
pp. 1416-1420
Author(s):  
Hee Jung Ko ◽  
Ji Ho Moon ◽  
Hak Eun Lee
Keyword(s):  
Axial Load ◽  
High Efficiency ◽  
Theoretical Study ◽  
Steel Plate ◽  
Axial Stiffness ◽  
Repeated Loading ◽  
Box Girder ◽  
Accordion Effect ◽  
Analytical Simulation ◽  
Unique Effect

The axial stiffness of the corrugated steel plate is negligible by nature of unique geometric characteristics of the plate called as the accordion effect. This unique effect results in high efficiency on post-tensioning. Thus, corrugated steel plate is very suitable for a web of PC-box girder. Recent researches show that strain and stress in sub-panel of corrugated steel webs, that are induced by local bending of the sub-panel, exist even if the axial stiffness is negligible. These strain and stress in sub-panel are important since it might cause fatigue failure of the structure under repeated loading. This study presents the analytical simulation of the accordion effect of the I-girder with corrugated steel webs under pure axial load or bending including the effect of local bending of sub-panel of the corrugated steel webs. Theoretical study and numerical results were combined to develop the simplified equation to evaluate the accordion effect including the effect of local bending of the sub-panel.

Nonlinear analysis for PC box-girder with corrugated steel webs under pure torsion

2012 ◽  
Vol 51 ◽  
pp. 167-173 ◽  
Author(s):  
Yong Ding ◽  
KeBin Jiang ◽  
YaWen Liu
Keyword(s):  
Nonlinear Analysis ◽  
Pure Torsion ◽  
Box Girder

Experimental study on composite mechanical properties of a double-deck prestressed concrete box girder

2019 ◽  
Vol 22 (12) ◽  
pp. 2545-2556 ◽  
Author(s):  
Mingqiao Zhu ◽  
Zefeng Yan ◽  
Lin Chen ◽  
Zhongliang Lu ◽  
Y Frank Chen
Keyword(s):  
Prestressed Concrete ◽  
Early Stage ◽  
Twist Angle ◽  
Structural Response ◽  
Test Results ◽  
Pure Torsion ◽  
Box Girder ◽  
Angle Crack ◽  
Concrete Box Girder ◽  
Transverse Steel

A series of tests were carried out on a scaled (1:8) double-deck prestressed concrete box girder in this study, aiming to study the structural response and failure mechanism of the box girder under prestressed axial compression, transverse bending, and torsion. The test results, such as the twist angle, crack development, and distortion of the box girder, were analyzed in detail. The results show that (1) the box girder eventually suffered lateral bending damage, and the cross-section of the support distorted severely; (2) torsional cracking occurred in the pure torsion region at the mid-span, but the longitudinal and transverse rebars did not yield, indicating that the pure torsion section of the box girder was still in the early stage of torsion failure; and (3) after the cracking of the box girder, stress redistribution phenomenon occurred, resulting in obvious nonlinear strain variations. Comparison of the longitudinal and transverse steel strains showed that transverse steel withstood the most shear stress during the early stage of torsion.

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