Numerical and experimental simulation of dowel action across reinforced concrete (RC) cracks under two-directional loading

2018 ◽  
Vol 45 (8) ◽  
pp. 634-646
Author(s):  
Ali Reza Moradi
Keyword(s):  
Reinforced Concrete ◽  
Precast Concrete ◽  
Stress Transfer ◽  
Experimental Results ◽  
Experimental Simulation ◽  
Shear Transfer ◽  
Dowel Action ◽  
Dependent Behavior ◽  
Path Dependent ◽  
Transfer Mechanisms

The local and global behavior of reinforced concrete (RC) members and structures may be affected by cracks and the capabilities of stress transfer mechanisms. Dowel action is one of the shear transfer mechanisms across RC cracks and particularly is the only mechanism in pre-formed joints that are common in precast concrete connections. Herein, the path-dependent behavior of dowel action mechanism is examined experimentally and analytically. Firstly, the effect of loading history and direction on the shear transfer capabilities of crossing bars are investigated experimentally. Then, according to the experimental results and observations, a model is extended to simulate and capture the directional path-dependent behavior of dowel action by introducing consistent formulas for subgrade springs based on the beam on the elastic foundation analogy. Verification is carried out by comparing with the corresponding experimental results and shows the fair accuracy of the proposed model and assumptions.

scholarly journals Shear transfer across cracks in reinforced concrete due to aggregate interlock and to dowel action Shear transfer in cracked reinforced concrete

1986 ◽  
Vol 38 (134) ◽  
pp. 47-51 ◽  
Author(s):  
S. G. Millard ◽  
R. P. Johnson ◽  
Sandro Dei Poli ◽  
Pietro Gambarova ◽  
Cengiz Karakoç
Keyword(s):  
Reinforced Concrete ◽  
Shear Transfer ◽  
Dowel Action ◽  
Aggregate Interlock

Mechanism of shear transfer in reinforced concrete beams

1977 ◽  
Vol 4 (2) ◽  
pp. 145-152
Author(s):  
K. N. Smith ◽  
S. M. Fereig
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Measurement Data ◽  
Reinforced Concrete Beams ◽  
Compression Zone ◽  
Interface Shear ◽  
Small Component ◽  
Shear Transfer ◽  
Dowel Action ◽  
Web Reinforcement

The mechanism of shear transfer in reinforced concrete beams with short shear spans is investigated with a view to defining the relative contribution of various component actions such as interface shear transfer across the characteristic inclined crack in such members, shear transferred by the uncracked compression zone, dowel action by the longitudinal tension reinforcement, and the contribution of the web reinforcement. The members tested and analyzed have a shear span to depth ratio of 1.5 and were loaded in the common framing situation involving shear on the sides of the members.For the beams either with horizontal web reinforcement or without any web reinforcement the distribution of internal forces was similar, with interface shear transfer, dowel action, and shear carried by the compression zone contributing to the capacity. In the case of members for which vertical web reinforcement was provided, interface shear transfer and dowel action were decreased to comparatively small component actions in the system. Acquisition of extensive measurement data and analysis of the behaviour history through various stages of loading permit the mechanism of shear transfer to be quantitatively defined.

scholarly journals Seismic behaviour and design of reinforced concrete interior beam-column joints

2002 ◽  
Vol 35 (2) ◽  
pp. 108-128 ◽  
Author(s):  
Cheng-Ming Lin ◽  
Jose I. Restrepo
Keyword(s):  
Reinforced Concrete ◽  
Parametric Analysis ◽  
Relative Importance ◽  
Design Equation ◽  
Concrete Frames ◽  
Seismic Behaviour ◽  
Shear Transfer ◽  
Current Design ◽  
Joint Shear ◽  
Transfer Mechanisms

This paper is aimed at improving the current understanding of the mechanisms of shear transfer in interior beam-column joints of reinforced concrete frames. Simple variable-angle truss models are used to illustrate the joint shear transfer mechanisms. The model is used in the paper to evaluate the relative importance of those variables that are deemed to affect the shear strength of joints in the current New Zealand Concrete Structures Standard, (SNZ, 1995). The analyses suggest that some of the variables currently being considered might not be as important as thought and that the current design recommendations can be simplified and, in general, be eased. The authors propose a simple three-component equation for use in design. The design equation is based on the results of a parametric analysis and was calibrated against a database of tests obtained from the literature.

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