Results 211 to 220 of about 37,069 (262)

Behaviour of post-tensioned concrete box girders

Bridge Engineering, 2004
This paper describes the results obtained to date from a study of the strains developed in two post-tensioned, prestressed concrete box girder bridges both during their construction and subsequent service lives. The instrumentation that was used is described and the simplification and representation of the material properties that were required for ...
R. J. Lark, R. W. Howells, B. I. G. Barr
openaire   +1 more source

Ultimate Strength of Concrete Box Girder Bridge

Journal of the Structural Division, 1974
Results obtained in a study of a large-scale, two-span, four-cell reinforced concrete box girder model are presented. The model, which was a 1:2.82 scale replica of a prototype, had overall plan dimensions of 72 ft (21.14 m) long by 12 ft (3.66 m) wide.
Jack G. Bouwkamp, Alexander C. Scordelis, S. Tanvir Wasti   +2 more
openaire   +1 more source

Full-scale bending test and parametric study on a 30-m span prestressed ultra-high performance concrete box girder

, 2020
Due to its structural efficiency, durability, and cost-effectiveness, ultra-high performance concrete was utilized to build the first highway overpass bridge in China. The bridge was made of prestressed ultra-high performance concrete box girders of four
Jia-zhan Su, Xi-lun Ma, Bao-chun Chen, K. Sennah   +3 more
semanticscholar   +1 more source

Application of High Performance Concrete in the Construction of Box Girder

Advanced Materials Research, 2013
The strength and durability are the main design parameters of high performance concrete. Concrete should be strict attention to the requirements of various raw materials and mix proportion design in the production process. Engineering example shows that high performance concrete has good durability, economy and environmental protection.
Qi Yong You, Hong Yong Yang
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On Sensitivity of Thermal Parameters for Concrete Box Girder in the Sunshine

Key Engineering Materials, 2008
In this paper, the temperature field and the thermal effects on a concrete box girder in the sunshine are investigated. For this purpose, the finite element method (FEM) package ANSYS is applied. By varying the values of different thermal parameters, the sensitivity of the thermal parameters is explored. Numerical results are presented and discussed to
Jian Zhuang Xiao, Zhi Wen Song, Chuan Zeng Zhang   +2 more
openaire   +1 more source

Cracking in a Curved, Reinforced Concrete Box Girder Bridge

Advances in Structural Engineering, 2002
A study to monitor a multi-span reinforced concrete bridge was recently completed. The bridge is curved, with a non-prismatic three-cell box cross section. Extensive field testing was performed to evaluate the causes and effects of large shear cracks.
Yongda Fu, John T. DeWolf
openaire   +1 more source

Live-load strain evaluation of the prestressed concrete box-girder bridge using deep learning and clustering

Structural Health Monitoring, 2019
The monitoring data makes it feasible to quickly evaluate the cracking of the prestressed concrete box-girder bridge. The live-load strain can accurately quantify the load effect and cracking of bridges due to its explicit datum point of signal. Based on
Han-wei Zhao, You-liang Ding, Ai-qun Li, Zhaozhao Ren, Kangzhen Yang   +4 more
semanticscholar   +1 more source

Overlay for Concrete Segmental Box-Girder Bridges

Journal of Bridge Engineering, 2000
Concrete overlay cracking and delamination were noticed on a concrete segmental box-girder bridge. Analytical investigation and field and laboratory examinations were conducted to identify the major factors causing the defects. The time-dependent stress distribution and its change in the overlay and along the interface between the overlay and the ...
openaire   +1 more source

Investigation on Construction Quality Indices for Concrete Box Girders

IABSE Reports, 2010
<p>Based on three bridge dismantlement, two construction quality indices were investigated in-situ, which consisted of duct grouting compaction of prestressing tendons, excess concrete rate in box girder. The result indicated that the excess concrete rate in box-girders, varied between 10% to 20% and the concrete excess centred at the top slab ...
Wen-Qing Wu, Feng Lin, Jia-Jia Fu
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Strengthening large concrete box-girder bridge on shear

IABSE Reports, 2010
<p>In the Rijkswaterstaat Programme “Widening of the Roads”, the road capacity on the bridges across the Low-Rhine has to be increased. Because of the resulting increase on traffic loads the bridges had to be structural assessed. At the same time a large amount of diagonal cracks in the webs of the twin box-girders were discovered.
Rob Vergoossen, Henk Sliedrecht, Cor Kuilboer   +2 more
openaire   +1 more source