Effects Analysis of Web Cracks on Long-Term Deformation of Large Span Pre-Stressed Concrete Continuous Box Girder Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 1207-1212 ◽  
Author(s):  
Fei Shao ◽  
Da Rong Pan ◽  
Feng Li ◽  
Ya Wen Liu
Keyword(s):  
Sustainable Development ◽  
Common Disease ◽  
Inclined Crack ◽  
Box Girder ◽  
Large Span ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
The Web ◽  
Inclined Cracks

Excessive deflection and its long-term sustainable development has become a common disease of large span pre-stressed concrete continuous box girder bridge, but the causes of it is difficult to reach consensus. A three-spans continuous pre-stressed concrete box girder bridge is studied in this paper. The web inclined cracks near L/4 of the continuous girder bridge is simulated by FEM (finite element method), in order to explore the influences of web inclined cracks near L/4 on the overall deflection of the bridge and the effect differences of the crack width, length and numbers. The results show that when the web inclined cracks reach a certain level, it will cause a long-term sustainable development of the deflection of the bridge. Therefore, web inclined crack is the main factor that causes the sustainable development of long-term deflection of large span pre-stressed concrete continuous box girder bridges.

Second Remediation of Long-Term Deflection and Cracking of PT Box-Girder Bridge Using External Post-Tensioning

2020 ◽  
Vol 34 (5) ◽  
pp. 04020090
Author(s):  
Xuhui Zhang ◽  
Shuang Li ◽  
Wei Zhang ◽  
Ogwu Ikechukwu ◽  
Lizhao Dai ◽  
...  
Keyword(s):  
Box Girder ◽  
Box Girder Bridge ◽  
Post Tensioning ◽  
Girder Bridge

scholarly journals Testing and long-term monitoring of a curved concrete box girder bridge

2011 ◽  
Vol 33 (10) ◽  
pp. 2861-2869 ◽  
Author(s):  
Hugo C. Gomez ◽  
Paul J. Fanning ◽  
Maria Q. Feng ◽  
Sungchil Lee
Keyword(s):  
Box Girder ◽  
Long Term Monitoring ◽  
Concrete Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Term Monitoring

Construction Monitoring Technology for Large-Span PC Continuous Box-Girder Bridge with Corrugated Steel Webs

2014 ◽  
Vol 1065-1069 ◽  
pp. 865-869
Author(s):  
Zhao Cai Liu ◽  
Lin Jie Hou ◽  
Can Hua Chang ◽  
Chong Hui Zhou ◽  
Shui Wan
Keyword(s):  
Field Measurements ◽  
Box Girder ◽  
Construction Monitoring ◽  
Large Span ◽  
Element Simulation ◽  
Single Room ◽  
Design Requirements ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
And Control

Through the construction monitoring of a large-span bridge which is a single box single room PC continuous box-girder bridge with corrugated steel webs, suitable methods are summed up. Finite element simulation was combined with field measurements data to calculate the model elevation of construction. By adjusting and control the model elevation, the linear shape of the bridge met the design requirements. By collecting strain data of the key sections of the bridge, abnormalities that may exist could be detected timely so that early warning could be made and construction safety and quality could be ensured.

Long-Term Prestress Loss and Camber of Box Girder Bridge

2014 ◽  
Vol 111 (6) ◽  
Author(s):  
P. Kamatchi ◽  
K. Balaji Rao ◽  
B. Dhayalini ◽  
S. Saibabu ◽  
S. Parivallal ◽  
...  
Keyword(s):  
Prestress Loss ◽  
Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge

Design of a Long-Term Monitoring System for a PSC Continuous Box-Girder Bridge

2014 ◽  
Vol 619 ◽  
pp. 1-9 ◽  
Author(s):  
Chuang Chen ◽  
R. Kaloop Mosbeh ◽  
Zong Lin Wang ◽  
Qing Fei Gao ◽  
Jun Fei Zhong
Keyword(s):  
Structural Health Monitoring ◽  
Monitoring System ◽  
Health Monitoring ◽  
Continuous Monitoring ◽  
Variable Cross ◽  
Box Girder ◽  
Structural Health ◽  
Box Girder Bridge ◽  
Girder Bridge

Structural Health Monitoring is becoming an increasingly common tool to obtain the long-term performance of infrastructures and buildings. Many structural health monitoring systems were developed and applied to different bridges in the world. However, very little is known on the applications in extreme cold environment. Fu Sui Bridge, a 1070 m variable cross-section continuous box-girder bridge, is located in the coldest province -- Heilongjiang province, China. In order to monitor the static and dynamic responses of the bridge under the traffic and environmental variation, a long-term continuous monitoring system was designed and installed on Fu Sui Bridge in April 2012. A hydrostatic leveling system was used to measure the displacement and fiber Bragg grating sensors were used to measure strain, acceleration and temperature. Moreover, other necessary components including data acquisition and transmission, data calculation and analysis software are also described. Summer and winter monitoring data are also presented. This paper focuses on: (1) the design and installation of the long-term continuous monitoring system hardware and (2) the operating pattern and function of the automatic monitoring system. After more than one year successful conducting, the system has provided a large amount of data records for daily management and research of the bridge. This system can be applied to extremely cold region.

scholarly journals Finite element analysis of temporary pre-stress system of precast segmental box girder bridge

2021 ◽  
Vol 276 ◽  
pp. 01015
Author(s):  
Wang Yahui ◽  
Yang Zheng ◽  
Kang Jiangwei ◽  
Li Zhongming
Keyword(s):  
Spatial Arrangement ◽  
Stress System ◽  
Assembly Process ◽  
Large Area ◽  
Element Analysis ◽  
Box Girder ◽  
Reasonable Number ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
The Web

The precast segmental bridge has the advantages of fast construction speed, good economic performance, and small impact on the surrounding environment. In order to study the role of the temporary pre-stressing system in the cantilever assembly process of the precast segment box girder bridge, ABAQUS was used to simulate the assembly process of the standard section of a viaduct. Studying the compressive stress and relative sliding of the joint section under the action of the self-weight and temporary pre-stress, the reasonable number and spatial arrangement of the tension pedestal are determined. The research results show that too few roof pedestals will cause the large area decompression state and too much will cause the construction period to be longer. When the roof symmetrical pedestal is located on the inner side of the web, it will obviously increase the area of the zero-compression stress at the end of the top slab. When the distance between the pedestal and the center of the web is 0.12L, the full section meets the minimum consolidation pressure requirement of the glued joint. The reasonable number of tension pedestals and their spatial arrangement will provide specific guidance and reference to assembling construction of actual precast segment box girder in the future.

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