Investigation of Bond Stress in Pull Out Specimens with High Strength Concrete
نویسنده
چکیده
Some international standard regulate the use of the high strength concrete, which may not be adopted generally without consideration of the differences that can exist among the materials in different countries. This paper relate the results of an experimental study consisting of pull out tests of Brazilian’s steel, with five different concrete strength 20, 40, 60, 80 and 100 MPa, and three different steel bars diameter 16.0, 20.0 and 25.0 mm. The experimental results for the relationship bond stress vs. slipping were compared with CEB provisions and with some theoretical formulations found in literature. One statistical analysis is made and based on this approach four equations for predicting the bond stress was derived.
منابع مشابه
Effect of the Concrete Strength on the Concrete-Steel Bond in Concrete Filled Steel Tubes
In this study, the concrete-steel bond strength of concrete filled cylindrical steel tubes has been experimentally investigated. 22 short, high strength and normal concrete filled circular steel tubes were tested. Push-out test was carried out as the common method to evaluate the bond carrying capacity. Four different concrete mixes were used in preparing the specimens. The steel tubes were w...
متن کاملExperimental Investigation of the Methods of Evaluating the Bond Strength Between Concrete Substrate and Repair Materials
This investigation was aimed at studying the effect of test methods on bond strength between concrete substrate and repair material. Four test methods with cementations or modified-cementations repair materials, and two surface roughnesses were studied. The methods used were pull-off, slant shear, splitting prism and a new direct shear named Bi-Surface shear test. While the coefficient of varia...
متن کاملSlippage of Steel in High and Normal Strength Concrete
Composite action of any reinforced concrete member is only possible if sufficient bond strength exists between steel reinforcing bars and concrete, which can adequately transfer shear stress between them. Bond strength is a function of compressive strength of concrete and hence high strength concrete has higher bond strength [1-2]. Therefore required development length can be reduced. In order ...
متن کاملExperimental investigation of the strength of glass fiber-reinforced concrete exposed to high temperature
This study investigated the effects of high temperature exposure on the compressive, tensile, and flexural strengths of concrete containing glass fiber. A total of 108 cubic specimens (150 mm × 150 mm × 150 mm), cylindrical specimens (300 mm × 150 mm), and prismatic specimens (500 mm × 150 mm × 150 mm) were prepared for compressive, tensile, and flexural strength testing, respectively. The spec...
متن کاملInvestigation of Stress-Strain Behavior of Plastic Concrete Using Monotonic Triaxial Compression Tests
In this paper, the mechanical behavior of plastic concrete being used in the cut-off walls of earth dams has been studied. To do the task, triaxial compression tests on the specimens in various ages and mix designs under different confining pressures have been done and the stress-strain behavior of such materials and their strength parameter changes has been experimentally investigated. It has ...
متن کامل