Experimental research on the creep behavior and bearing capacity of repeatedly prestressed concrete beam

Under the acid rain corrosion condition, the shear-bearing capacity of the pretension prestressed concrete beam will attenuate gradually with the stirrup corrosion and concrete deteriorate. Moreover, the stress corrosion cracking failure and the bond force degradation of the prestressed wires that caused by the aggravated corrosion mediator ingress will further increase the shear failure risk of the pretension prestressed concrete structure without any symptom. The paper presents a shear bearing capacity calculation model of the pretension prestressed concrete beam bridge and discuss the time-variation model of the stirrup corrosion considering the effective prestress attenuation under the acid rain corrosion condition. The analysis method on anti-shear reliability of existing pretension prestressed concrete beam bridges under the sodium sulfate corrosion condition is proposed then. The method will be used in the durability and safety evaluation of the shear-bearing capacity of the existing pretension prestressed concrete beam bridges in the corrosion environment with acid rain.

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Analysis on ultimate bearing capacity of the prestressed concrete beam end of dispersion anchorage under local pressure

Proceedings of the 5th International Conference on Civil Engineering and Transportation 2015 ◽

10.2991/iccet-15.2015.134 ◽

2015 ◽

Author(s):

Xinsheng Yin ◽

Yang Liu

Keyword(s):

Bearing Capacity ◽

Prestressed Concrete ◽

Concrete Beam ◽

Ultimate Bearing Capacity ◽

Local Pressure ◽

Prestressed Concrete Beam

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Nondestructive detection experimental research on prestressed concrete beam

2010 2nd International Asia Conference on Informatics in Control, Automation and Robotics (CAR 2010) ◽

10.1109/car.2010.5456656 ◽

2010 ◽

Author(s):

Su Jian ◽

Sun Zhong-guang

Keyword(s):

Experimental Research ◽

Prestressed Concrete ◽

Concrete Beam ◽

Nondestructive Detection ◽

Prestressed Concrete Beam

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Anti-Shear Reliability Analysis of Existing Pre-Tensioned Prestressed Concrete Beam Bridges under Atmosphere Condition

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.1017 ◽

2011 ◽

Vol 255-260 ◽

pp. 1017-1022

Author(s):

Feng Chen ◽

Da Lin Hu ◽

Yi Li Sun

Keyword(s):

Bearing Capacity ◽

Prestressed Concrete ◽

Concrete Beam ◽

Shear Failure ◽

Safety Evaluation ◽

Calculation Model ◽

Corrosion Condition ◽

Prestressed Concrete Beam ◽

Shear Bearing Capacity ◽

Beam Bridge

The shear bearing capacity of pretensioning prestressed concrete beam bridge mainly depends on the stirrup and concrete of the beam, but the longitudinal pre-pressure plays a certain role for the shear bearing of the structure. Under the carbonization corrosion condition, the shear-bearing capacity of the pretensioning prestressed concrete beam will attenuate gradually with the stirrup corrosion and concrete deteriorate. And the risk of brittle shear failure will be increased with the enhanced reinforcement corrosion amount. The paper presents an anti-shear calculation model of the pretensioning prestressed concrete beam bridge, and discusses the time-variation model of the corrosion stirrup considering the effective prestress attenuation under the carbonization corrosion condition. The analysis method on the anti-shear reliability of existing pretensioning bridges under the corrosion condition is proposed then. The method will be used in the durability and safety evaluation of the shear-bearing capacity of the existing pretensioning prestressed concrete bridges.

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FEM Analysis of Bi-Prestressed Concrete Beam

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.743.138 ◽

2013 ◽

Vol 743 ◽

pp. 138-141

Author(s):

Feng Gao ◽

Tong Liu

Keyword(s):

Constitutive Equation ◽

Bearing Capacity ◽

Prestressed Concrete ◽

Concrete Beam ◽

Fem Analysis ◽

Solid Modeling ◽

Failure Criteria ◽

Ansys Software ◽

Prestressed Concrete Beam ◽

Cooling Method

Based on ANSYS software, the solid modeling method was performed to build the half model of bi-prestressed concrete beam. And the solution for solve the problem such as the constitutive equation, failure criteria , the method of modeling,the infliction method of prestressed was summarized in this paper. The heating-cooling method was used to achieve the bi-prestressed.The simulate method was reasonable while the built mode was performed to simulate the pre-arch and bearing capacity, simulate the pre-arch and bearing capacity of pre-pressed bi-prestressed concrete beam by FEM software ,and compared with the experiment results. And summarized the handling of the constitutive equation,failure criteria,the infliction method of prestressed, the method of modeling ,and so on. All of the method will provide reference for the research of Bi-prestressed concrete beam.

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