Flexural Capacity of Singly Reinforced CRC Beams(Part-I)

2010 ◽  
Vol 168-170 ◽  
pp. 1810-1814 ◽  
Author(s):  
Han Zhu ◽  
Lin Hu Yang ◽  
Lin Yuan
Keyword(s):  
Concrete Beams ◽  
Crumb Rubber ◽  
Mechanical Analysis ◽  
Flexural Capacity ◽  
Stress Strain ◽  
Conventional Concrete ◽  
External Moment ◽  
Strain Relationship ◽  
Material Conditions ◽  
Rubber Concrete

Crumb rubber concrete (CRC) is made by adding rubber crumbs into conventional concrete, and many studies show that ultimate compressive strains for CRC are much bigger than those for conventional concrete. This article undertakes a mechanical analysis of a reinforced beam based on a proposed CRC stress-strain relationship. The results show that, assuming identical geometrical and material conditions, CRC beam can support more external moment than what conventional concrete beams can do.

Study on the Structural Properties of Steel Reinforced CRC Beam-Cracking Resistance

2011 ◽  
Vol 374-377 ◽  
pp. 775-780 ◽  
Author(s):  
Hong Mei Guo ◽  
Han Zhu
Keyword(s):  
Crumb Rubber ◽  
Basic Material ◽  
Cracking Resistance ◽  
Conventional Concrete ◽  
Concrete Material ◽  
Engineering Construction ◽  
Resistant Moment ◽  
Holding Back ◽  
Rubber Concrete ◽  
Good Agreement

In recent years, there has been mounting interest in the use of recyled tire rubbers in engineering construction. Crumb rubber concrete (CRC) is made by adding rubber crumbs into conventional concrete. As a new kind of concrete material of energy saving and environment protecting, CRC has many advantages such as lower Young’s modulus, high damp modulus, large deformation, better depleting energy and perfect ability of holding back crack. The research about it at home and abroad mainly focuses on the basic material properties. But, studies on structural behavior of steel reinforced CRC for structure were seldom reported. This paper, based on the existing experiments, analyzed the cracking resistance of steel reinforced CRC beam under static load, and deduced a new crack-resistant moment formula. The calculating results using this formula have good agreement with the experimental results obtained by other researchers. The study shows that the steel reinforced CRC can effectively improve the cracking resistance of structure.

Analysis of Mechanical Performance of Crumb Rubber Concrete by Different Aggregate Shape under Uniaxial Compression on Mesoscopic

2011 ◽  
Vol 462-463 ◽  
pp. 219-222 ◽  
Author(s):  
Gen Quan Zhong ◽  
Yong Chang Guo ◽  
Li Juan Li ◽  
Feng Liu
Keyword(s):  
Mechanical Properties ◽  
Uniaxial Compression ◽  
Crumb Rubber ◽  
Aggregate Model ◽  
Stress Strain ◽  
Random Aggregate ◽  
Random Aggregate Model ◽  
Crumb Rubber Concrete ◽  
Aggregate Shape ◽  
Rubber Concrete

From micro perspective, crumb rubber concrete (CRC) is viewed as a composite consisting of mortar matrix, aggregates and rubber particle. In this paper, based on random aggregate model with different aggregate shape in planar, the mechanical properties of CRC using linear Mohr-coulomb constitutive relation are studied by nonlinear finite element method under uniaxial compression on mesoscopic. The number of random aggregates is calculated in two-dimension by Walraven formula. Circular random aggregate model, elliptic random aggregate model and polygonal random aggregate model are established. Stress-strain curves under varieties of conditions are derived and compared with the test results. The results show that the simulative stress-strain curve fit the reality very much. In the numerical analysis, the aggregate shape has little effect on the mechanical properties of CRC.

Minimum Reinforcement Ratio of Concrete Beams Reinforced with FRP Bars

2011 ◽  
Vol 282-283 ◽  
pp. 553-556
Author(s):  
Chun Xia Li ◽  
Shi Lin Yan
Keyword(s):  
Concrete Structure ◽  
Concrete Beams ◽  
Flexural Capacity ◽  
Concrete Member ◽  
Stress Strain ◽  
Concrete Cracking ◽  
Minimum Reinforcement ◽  
Stress Strain Relation ◽  
Simplified Calculation ◽  
Frp Bars

Based on the non-linearity stress strain relation of concrete, the cracking moment of plain flexural concrete member is established, and the flexural capacity of concrete beams reinforced with FRP bars is also obtained under FRP rupture-controlled failure. To prevent FRP rupture failure upon concrete cracking, the minimum reinforcement ration should be derived from simplified calculation, which may provide some theoretic guidance on design and construction for concrete structure reinforced with FRP bars.

Experimental and Economic Analysis of Airport Crumb Rubber Concrete (CRC) Pavement

2011 ◽  
Vol 250-253 ◽  
pp. 605-608
Author(s):  
Yan Ru Li ◽  
Han Zhu ◽  
Chun Sheng Liu
Keyword(s):  
Service Life ◽  
Concrete Beams ◽  
Crumb Rubber ◽  
Cement Concrete ◽  
Loading Test ◽  
Cost Performance ◽  
Bending Property ◽  
Airport Pavement ◽  
Crumb Rubber Concrete ◽  
Rubber Concrete

The feasibility of using crumb rubber concrete (CRC) in airport pavement is discussed by analyzing the capability of crumb rubber concrete. The bending property of CRC is studied by four point loading test of small-sized rubber concrete beams. Comparing with cement concrete (CC) pavement, the board thickness of CRC pavement is analyzed. The conclusions are reached that appropriate mixing of crumb rubber could satisfy strength demand and improve durability of airport pavement, and the thickness of CRC pavement is 93 percent of that of CC pavement. As a result, airport CRC pavement has longer service life and perfect cost performance.

Curvature Ductility of Singly Reinforced CRC Beams (Part-II)

2010 ◽  
Vol 168-170 ◽  
pp. 2111-2115
Author(s):  
Lin Hu Yang ◽  
Han Zhu ◽  
Apostolos Fafitis
Keyword(s):  
Theoretical Analysis ◽  
Concrete Beam ◽  
Crumb Rubber ◽  
Previous Article ◽  
Conventional Concrete ◽  
Ductility Factor ◽  
Curvature Ductility ◽  
Crumb Rubber Concrete ◽  
Material Ductility ◽  
Rubber Concrete

This article (Part-II) continues the work of a previous article (Part-I). It undertakes a theoretical analysis of the curvature ductility factor (CDF) of a singly reinforced CRC (crumb rubber concrete) beam and demonstrates how CRC’s material ductility is transformed into structural ductility of a reinforced CRC beam. The result shows that CDF for a reinforced CRC beam is much higher than that for a conventional concrete reinforced beam.

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