Service Performance of Long-Span Lightweight Aggregate Concrete Box-Girder Bridges

2016 ◽  
Vol 30 (1) ◽  
pp. 04014196 ◽  
Author(s):  
Y. H. Chai
Keyword(s):  
Lightweight Aggregate ◽  
Service Performance ◽  
Lightweight Aggregate Concrete ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Aggregate Concrete ◽  
Girder Bridges ◽  
Long Span ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges

Spatial Stress Analysis of Long Span Prestressed Concrete Box Girder Bridges

2012 ◽  
Vol 256-259 ◽  
pp. 1693-1696
Author(s):  
Xian Lin Yu ◽  
Jian Shu Ye ◽  
Wen Qing Wu
Keyword(s):  
Prestressed Concrete ◽  
Shell Element ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Long Span ◽  
Principal Tensile Stress ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Spatial Stress

A FEA program using 8 nodes and 40 freedoms degenerated solid shell element was developed to analyze the spatial stress of long span prestressed concrete box girder bridges during construction stage and finished stage. The maximum principal tensile stress positions on box girder section and shear lag coefficient were researched according to spatial stress results. It presented suggestions on prestressed concrete box girder bridges anti-crack design.

Effect of Pier Vertical Deformations on Deflections of Main Girders for High Pier and Long-Span Continuous Rigid-Frame Bridges

2010 ◽  
Vol 163-167 ◽  
pp. 1436-1439
Author(s):  
Jin Sheng Du ◽  
Hai Bin Liu
Keyword(s):  
Prestressed Concrete ◽  
Short Term ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Long Span ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Main Girder

In some long-span prestressed concrete box girder bridges, excessive deflections of main girders are often observed. These unacceptable deflections have detrimental influence on the serviceability and safety of the structures. To better understand and estimate short term and long term deflections for prestressed concrete box girder bridges, pier vertical deformation and its effect on deflections of main girders of Jinghe Bridg is investigated in this paper. Piers in Jinghe Bridge are tall and the difference in height between piers up to 22 m. Analysis indicates that although the short term deformations of piers are small, the long term deformations of piers can be 3 times as large as that of short-term ones. The maximum short-term downward deflection of Jinghe Bridge caused by pier deformation for main girders is 7.7 mm and the maximum long-term downward deflection is 33.3 mm. These values are relatively small compared with the span length of the bridge. But when the deflection of the main girder itself is also included, the final total deflection of the main girder may exceed the design code limit.

Transverse Post-Tensioning in Long-Span Concrete Box-Girder Bridges: Refined Modeling and Alternative System

2020 ◽  
Vol 25 (3) ◽  
pp. 04020005
Author(s):  
Zhi-Qi He ◽  
Weiding Zhuo ◽  
Yedong Jiang ◽  
Shixiang Zhang ◽  
Zhao Liu ◽  
...  
Keyword(s):  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Long Span ◽  
Alternative System ◽  
Concrete Box Girder ◽  
Post Tensioning ◽  
Concrete Box Girder Bridges

Crack-based serviceability assessment of post-tensioned segmental concrete box-girder bridges

Structures ◽  
2021 ◽  
Vol 30 ◽  
pp. 1097-1108
Author(s):  
Zhi-Qi He ◽  
Yonghui Li ◽  
Tian Xu ◽  
Zhao Liu ◽  
Zhongguo John Ma
Keyword(s):  
Box Girder Bridges ◽  
Box Girder ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Post Tensioned
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