scholarly journals EVALUATION METHOD OF FLEXURAL CAPACITY FOR ASR DETERIORATED PRESTRESSED CONCRETE BEAM STRUCTURE WITH CRACK DENSITY AND MECHANICAL PROPERTIES OF DRILLED CORES

2017 ◽  
Vol 73 (2) ◽  
pp. 191-206
Author(s):  
Yukio HIROI ◽  
Takashi YAMAMOTO ◽  
Yoshihiko TODA ◽  
Yusuke TAKAGI
Keyword(s):  
Mechanical Properties ◽  
Prestressed Concrete ◽  
Concrete Beam ◽  
Evaluation Method ◽  
Crack Density ◽  
Flexural Capacity ◽  
Beam Structure ◽  
Prestressed Concrete Beam

Analysis of Damages Correlation of Prestressed Concrete Beam

2011 ◽  
Vol 94-96 ◽  
pp. 244-247
Author(s):  
Feng Peng Zhang ◽  
Zhao Guo Qiu ◽  
Han Zhi
Keyword(s):  
Elastic Modulus ◽  
Prestressed Concrete ◽  
Concrete Beam ◽  
Evaluation Method ◽  
Concrete Strength ◽  
Safety Evaluation ◽  
Steel Corrosion ◽  
Corrosion Damage ◽  
Reinforcing Steel ◽  
Prestressed Concrete Beam

Damages correlation of prestressed concrete beam and its safety evaluation have been studied by finite element method. The influences of three typical damages on deflection of beam have been analyzed. The vertical crack damage (VC) has been simulated by pre-crack and contact elements has been set between crack surfaces, the reinforcing steel corrosion damage (RSC) has been simulated by reducing the effective area of the reinforcing steel, and the concrete strength degradation damage (CSD) has been simulated by changing the elastic modulus of concrete based on the relationship between concrete strength and its elastic modulus. Damage correlation variables have been defined, and safety evaluation method of concrete beam based on damage correlation has been discussed. The results showed that: there is a strong nonlinear correlation between VC and RSC, and the beam's safety states are significantly reduced because of the interaction of damages.

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