scholarly journals CALCULATION METHOD OF FLEXURAL CRACK WIDTH OF REINFORCED CONCRETE MEMBER UNDER SUSTAINED LOADING

2003 ◽  
Vol 68 (565) ◽  
pp. 103-110 ◽  
Author(s):  
Zhenbao LI ◽  
Yoshiteru OHNO ◽  
Hua MA
Keyword(s):  
Reinforced Concrete ◽  
Calculation Method ◽  
Crack Width ◽  
Concrete Member ◽  
Sustained Loading ◽  
Reinforced Concrete Member

Research on the Crack Stability of Dam Concrete Based on the Measured Monitoring Data

2011 ◽  
Vol 250-253 ◽  
pp. 2713-2718
Author(s):  
Jun Feng Guan ◽  
Yu Hu ◽  
Shun Bo Zhao ◽  
Long Bang Qing ◽  
Qing Bin Li ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Crack Width ◽  
Practical Method ◽  
Monitoring Data ◽  
Theoretical Expression ◽  
Concrete Member ◽  
Crack Control ◽  
Reinforced Concrete Member ◽  
Crack Stability ◽  
Dam Concrete

This paper proposes a theoretical expression for the ultimate relationship between the crack gauge monitoring data and steel stress gauge ones in dam concrete, based on the equation for crack width of reinforced concrete member, when the cracks expanded to the crack-control steel. In addition, a practical method is developed for analyzing and determining the crack stability of dam concrete, which predicts whether a crack elongated to the crack-control steel or not by comparing the observed values to the theoretical ultimate value. The provided method is proven to be proper to evaluate the crack stability of dam, which is simple and practical.

Mesoscopic damage evolution on bonding interface and its influence on macroscopic performance deterioration of reinforced concrete member

2019 ◽  
Vol 08 (02) ◽  
pp. 1950005
Author(s):  
Ying Wang ◽  
Yuqian Zheng ◽  
Xuan Wang
Keyword(s):  
Reinforced Concrete ◽  
Bonding Strength ◽  
Element Model ◽  
Bonding Interface ◽  
Interfacial Damage ◽  
Concrete Member ◽  
Steel Bar ◽  
Reinforced Concrete Member ◽  
Bonding Property ◽  
Performance Deterioration

Slip or debonding of bonding interface is the key cause of the performance degradation or failure of the reinforced concrete (RC) member. In this paper, based on Monte Carlo method, a mesoscopic finite element model composed of mortar, coarse aggregate and steel rebar was established to consider the mesoscopic damage on the bonding interface and its influence on macroscopic performance deterioration of RC specimen. The results show that the simulation results fit well with experimental data. Higher initial interfacial damage results in lower bonding strength and smaller final displacement. Higher mortar modulus could greatly improve the initial bonding property and bonding strength, but slightly increase the final damage. Compared with the RC specimen model with plain steel bar, the model with deformed steel bar shows a longer duration of nonlinear increase for drawing force and lower bonding strength. When confinement is applied, the coalescence of damage zones is prevented due to the effect of thread. Therefore, the application of confinement could increase the bonding strength and the initial bonding property.

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