Bond Strength – Slip Relationship between Crumbed Rubber Concrete and Reinforcing Steel
Journal Title: International Scientific Research Organization Journal - Year 2016, Vol 1, Issue 5
Abstract
Crumb Rubber Concrete (CRC) has become a preferable engineering material for specific structures due to its excellent performance in deformation capacity and energy absorbing capacity. Its material properties have been investigated in the past decades, and yet its structural behaviour is waited to be understood before it can be applied to engineering structures in reality. This paper utilises computer package of ANSYS Workbench 15.0, which employs Finite Element Method (FEM), to simulate and analyse the bond behaviour between CRC and steel rebars based on pull-out test, and compares the bond-slip behaviour of the models of CRC and Traditional Concrete (TC) (being as referenced specimen) embedded with different type and sizes of steel rebars (deformed/ plain and N12/N16) with various bond length (5d, 10d, 250mm and 300mm). The results indicate that the bond stress in 5d model is uniformly distributed unlike the discrete distribution of 10d, 250 mm and 300 mm models. This means that the average value of 5d specimen from laboratory pull-out tests can be considered as characteristic bond strength between concrete and embedded rebar, whereas that of 10d model cannot represent local bond strength. The relationship between allowable pull-out force and specimen bond length is found, in which the force shows a nearly linear-increasing correlation with increasing bond length. A slower rate of force change appears in this relationship when bond length reaches 300mm, which implies that the force would possibly increase slower with bond length longer than 300mm.
Authors and Affiliations
Yi Ou
Keywords
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