Reinforced Concrete Material Response and Properties

2021 ◽  
pp. 247-266
Keyword(s):  
Reinforced Concrete ◽  
Concrete Material ◽  
Material Response

scholarly journals A bi-dissipative damage model for concrete

2015 ◽  
Vol 8 (1) ◽  
pp. 49-65
Author(s):  
J. J. C. Pituba ◽  
W. M. Pereira Júnior
Keyword(s):  
Reinforced Concrete ◽  
Structural Engineering ◽  
Damage Mechanics ◽  
Damage Model ◽  
Continuum Damage Mechanics ◽  
Concrete Material ◽  
Framed Structures ◽  
Energy Equivalence ◽  
Proposed Model ◽  
Damage Processes

This work deals with an improvement of an anisotropic damage model in order to analyze reinforced concrete structures submitted to reversal loading. The original constitutive model is based on the fundamental hypothesis of energy equivalence between real and continuous media following the concepts of the Continuum Damage Mechanics. The concrete is assumed as an initial elastic isotropic medium presenting anisotropy, permanent strains and bimodularity induced by damage evolution. In order to take into account the bimodularity, two damage tensors governing the rigidity in tension or compression regimes are introduced. However, the original model is not capable to simulate the influence of the previous damage processes in compression regimes. In order to avoid this problem, some conditions are introduced to simulate the damage unilateral effect. It has noted that the damage model is agreement with to micromechanical theory conditions when dealing to unilateral effect in concrete material. Finally, the proposed model is applied in the analyses of reinforced concrete framed structures submitted to reversal loading. These numerical applications show the good performance of the model and its potentialities to simulate practical problems in structural engineering.

Experimental Study on Cement Mortar with Bentonite

2013 ◽  
Vol 671-674 ◽  
pp. 1741-1744 ◽  
Author(s):  
Hsien Hua Lee ◽  
C. W. Wang
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Marine Environment ◽  
Cement Mortar ◽  
Combined Effects ◽  
Concrete Material ◽  
Corrosion Resistant ◽  
Steel Bars ◽  
Reinforced Steel ◽  
Physical And Chemical

For an infrastructure construction located in marine environments, maintaining good durability for the structures always imposes serious challenges, especially for the structure made of reinforced concrete. Concrete exposed to marine environment may deteriorate as a result of combined effects of both physical and chemical actions from marine environment. Corrosion of the reinforced steel bars that are embedded in the concrete is the most serious problem. Therefore, a method to protect the reinforced concrete in the marine environment from damages due to material deterioration and corrosion is proposed in this study. The method is through the application of bentonite material by utilizing its very finely divided form so that the larger capillary pores in concrete can be filled up. In this way, the impermeability of concrete material can be enhanced and then improve the corrosion resistant ability of the material.

The Illumination Characteristics of Glass-Based Mazu Temple Buildings Compared to Traditional Temples in Taiwan

2013 ◽  
Vol 805-806 ◽  
pp. 1616-1619
Author(s):  
Chao Shui Lin ◽  
Chun Hung Hu ◽  
Peng Lai Chen ◽  
Tsair Rong Chen
Keyword(s):  
Reinforced Concrete ◽  
Wood Production ◽  
Concrete Material ◽  
Require Time ◽  
Artificial Lighting ◽  
Religious Buildings ◽  
Indoor Lighting ◽  
Role Of Religion ◽  
Better Than

The role of religion in providing people spiritual stability and the necessity for conducting worships has increased the demands of religious buildings. Taoist religious buildings have a significant presence in Taiwan. With increasing environmental awareness and declining wood production, current constructions of Taoist buildings have shifted from using wood to employing reinforced concrete as building material. However, insufficient indoor lighting results in buildings requiring artificial lighting, which in turn leads to energy consumption. Therefore, a glass-based material Mazu temple is proposed to substitute wood and reinforced concrete material. The design consideration for building is illustrated in this paper. Furthermore, the illumination of the Mazu temple constructed will is analyzed and compared to a traditional Taoist temple building. The results show that the illumination of glass-based temple buildings is better than traditional temple buliding. Hence, it could reduce the require time of artificial lighting.

scholarly journals Numerical simulation of the experimental behavior of RC beams at elevated temperatures

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Camille A. Issa ◽  
Ramezan A. Izadifard
Keyword(s):  
Reinforced Concrete ◽  
High Temperatures ◽  
Elevated Temperatures ◽  
Material Behavior ◽  
Reinforced Concrete Beams ◽  
Structural Members ◽  
Fire Event ◽  
Concrete Material ◽  
Concrete Members ◽  
Actual Fire

AbstractThe danger of fire is present always and everywhere. The imminent danger depends upon the actual type and length of fire exposure. Reinforced concrete structural members are loadbearing components in buildup structures and are therefore at high risk, since the entire structure might potentially collapse upon their failure. Thus, it is imperative to comprehend the behavior of reinforced concrete members at high temperatures in case of fire. In this study, the mechanical properties of concrete exposed to high temperatures were experimentally determined through the testing of 27 concrete cylinder starting at room temperature and increasing up to 260 °C. The concrete material behavior was implemented into the ABAQUS software and a finite simulation of reinforced concrete beams exposed to actual fire conditions were conducted. The finite element models compared favorably with the available experimental results. Thus, providing a valuable tool that allows for the prediction of failure in case of a fire event.

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