Analysis on the Capacity of Old Highway Bridge

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.791-793.358 ◽

2013 ◽

Vol 791-793 ◽

pp. 358-361

Author(s):

Ya Xun Yang ◽

Wei Shan Wang ◽

Chao Qiao

Keyword(s):

Bearing Capacity ◽

Load Test ◽

Capacity Assessment ◽

Highway Bridge ◽

Box Girder Bridges ◽

Box Girder ◽

Girder Bridges

Most bridges show different degrees of disease in the operations many years later. Combing the bridge disease investigation, materials inspection and load test done on the background of the interchanges over Yicheng-Houma expressway, this paper will make assessment of the frequently-used box-girder bridges' bearing capacity in the expressway to provide a reference for bearing capacity assessment of the old expressway bridges.

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Analysis on the Bearing Capacity of Old Highway Bridge in Heavy Hilly Areas

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.343.31 ◽

2013 ◽

Vol 343 ◽

pp. 31-33

Author(s):

Ya Xun Yang ◽

Chao Qiao

Keyword(s):

Bearing Capacity ◽

Heavy Traffic ◽

Load Test ◽

Highway Bridge ◽

Mountainous Areas ◽

Heavy Duty ◽

Box Girder Bridges ◽

Box Girder ◽

Mountainous Regions ◽

Girder Bridges

There is heavy traffic on many expressway bridges in mountainous areas volume, and particularly there are often heavy duty vehicles in the coal-producing regions. Most bridges show different degrees of disease in the operations many years later. Combing the bridge disease investigation, materials inspection and load test done on the background of the interchanges over Yicheng-Houma expressway, this paper will make assessment of the frequently-used box-girder bridges' bearing capacity in the expressway to provide a reference for bearing capacity assessment of the old expressway bridges in mountainous regions.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.163-167.3551 ◽

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.

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Influence of Cracks Parameters on Bearing Capacity for Prestressed Concrete Box Girder

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.166-169.1963 ◽

2012 ◽

Vol 166-169 ◽

pp. 1963-1966

Author(s):

Zhao Ning Zhang

Keyword(s):

Bearing Capacity ◽

Prestressed Concrete ◽

Operations Management ◽

Box Girder Bridges ◽

Box Girder ◽

Girder Bridges ◽

Long Span ◽

Continuous Rigid Frame Bridge ◽

Rigid Frame ◽

Rigid Frame Bridge

For long-span pre-stressed concrete continuous box girder bridges, cracks and other damage problem are often found because of influence of loads, climate, operations management and other factors during operation. The problem of cracking is serious increasingly, which has a direct impact on usability, durability and security. In order to analyze the bearing capacity of the bridge with cracks under different parameters, such as cracks width, cracks height and cracks spacing and provide the basis for the safety assessment and reinforcement, the paper puts forward the cracking reduction coefficient that evaluates the bearing capacity of the damaged bridge based on the tensile stress control. A three-span continuous rigid frame bridge is analyzed and the result shows that the bearing capacity of the bridge is in inverse proportion to cracks width and cracks height. The bearing capacity of the bridge is in direct proportion to cracks spacing.

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