FEM Analysis of Bi-Prestressed Concrete Beam

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.

Deflection Analysis of Externally Prestressed Concrete Beam Based on Damage Mechanics

2010 ◽  
Vol 163-167 ◽  
pp. 928-932
Author(s):  
Hui Xia Xiong ◽  
Yu Zhou Sima ◽  
Yao Ting Zhang
Keyword(s):  
Finite Element ◽  
Constitutive Equation ◽  
Prestressed Concrete ◽  
Damage Mechanics ◽  
Concrete Beam ◽  
Finite Element Program ◽  
Value Analysis ◽  
Prestressed Concrete Beam ◽  
Deflection Analysis ◽  
Concrete Materials

This article describes the static experiment of externally prestressed concrete beam under the beeline reinforcing patterns. It adopts the damage mechanics - superimposed load - finite element method, uses damage constitutive equation to replace the constitutive equation, which does not take the damage into account, self-compiled eight-node uniform-parameter element superimposed load finite element program is used to analyze the forced distortion of experimental beam. The value analysis results show: the damage mechanics can soundly reflect the complicated behaviors of concrete materials in the load-superimposing process and has obtained the values of the concrete material damage characteristic parameters and achieved the results that are consistent with the experiment. Therefore, damage mechanics has provided a new way in studying the nonlinear behaviors of concrete materials.

Influences of Installment Tensioning Technology on Bearing Capacity of Rectangular Prestressed Concrete Beam

2017 ◽  
Vol 23 (2) ◽  
pp. 122-129 ◽  
Author(s):  
Hongyan Ding ◽  
Peng Liu ◽  
Puyang Zhang ◽  
Yan Zhu ◽  
Yaohua Guo
Keyword(s):  
Bearing Capacity ◽  
Prestressed Concrete ◽  
Concrete Beam ◽  
Prestressed Concrete Beam

Anti-Shear Reliability Analysis of Existing Pretension Prestressed Concrete Beam Bridges in the Corrosion Environment with Acid Rain

2010 ◽  
Vol 150-151 ◽  
pp. 1488-1494
Author(s):  
Feng Chen ◽  
Shuan Hai He ◽  
Da Lin Hu ◽  
Bing Yuan Huang
Keyword(s):  
Bearing Capacity ◽  
Acid Rain ◽  
Prestressed Concrete ◽  
Concrete Beam ◽  
Shear Failure ◽  
Safety Evaluation ◽  
Calculation Model ◽  
Corrosion Condition ◽  
Prestressed Concrete Beam ◽  
Shear Bearing Capacity

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.

Test and Design of Tensile-Compression Prestressed Concrete Beam

2011 ◽  
Vol 71-78 ◽  
pp. 722-727 ◽  
Author(s):  
Jing Bo An
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Prestressed Concrete ◽  
Concrete Structure ◽  
Concrete Beam ◽  
Steel Tube ◽  
The Finite Element Method ◽  
Ansys Software ◽  
Prestressed Concrete Beam ◽  
Pressure Area

In this paper, the tensile-compression prestressed concrete beam was researched, and gets deflection of the beam subjected to load. Then, the beam was analyzed by the finite element method of ANSYS software. The test and analysis results show that the beam has a good flexibility and the phenomenon of stress concentration were appeared in ends concrete of pre-compressed steel tube. The pre-compressed steel tube control stress is 0.5 times the nominal value of steel tube, the concrete pre-tensile stress can be obtained effectively by relaxes pre-compressed steel tube. This paper further optimizes the dosage of pre-tensile tendon (Ap), pre-compressed steel tube (AT), tensile reinforcements (As)and compression reinforcements (A`s).The results from example show that the concrete structure of tensile-compression prestressed can reduce the pressure area height of the beam effectively and solving conventional prestressed concrete structure excessive or cannot reinforcement in pressure area.

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

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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