scholarly journals ON THE MECHANISM OF SHEAR FAILURE OF REINFORCED CONCRETE MEMBERS

1972 ◽  
Vol 200 (0) ◽  
pp. 35-44,104
Author(s):  
TAKASHIGE HATTORI ◽  
TAKUJI SHIBATA ◽  
KAZUO OHNO
Keyword(s):  
Reinforced Concrete ◽  
Shear Failure ◽  
Concrete Members

scholarly journals Predicting shear failure in reinforced concrete members using a three-dimensional peridynamic framework

2021 ◽  
Author(s):  
Mark Hobbs ◽  
Gabriel Hattorri ◽  
John Orr
Keyword(s):  
Reinforced Concrete ◽  
Failure Modes ◽  
Shear Failure ◽  
Load Transfer ◽  
Three Dimensional ◽  
Constitutive Law ◽  
Concrete Members ◽  
Predictive Error ◽  
Wide Range ◽  
Transfer Mechanisms

The assumptions made in design codes can result in unconservative predictions of shear strength for reinforced concrete members. The limitations of empirical methods have prompted the development and use of numerical techniques. A three-dimensional bond-based peridynamic framework is developed for predicting shear failure in reinforced concrete members. The predictive accuracy and generality of the framework is assessed against existing experimental results. Nine reinforced concrete beams that exhibit a wide range of failure modes are modelled. The shear-span-to-depth ratio is systematically varied from 1 to 8 to facilitate a study of different load-transfer mechanisms and failure modes. A comprehensive validation study such as this has until now been missing in the peridynamic literature. A bilinear constitutive law is employed, and the sensitivity of the model is tested using two levels of mesh refinement. The predictive error between the experimental and numerical failure loads ranges from +3% to -57%, highlighting the importance of validation against a series of problems. The results demonstrate that the model captures many of the factors that contribute to shear and bending resistance. New insights into the capabilities and deficiencies of the peridynamic model are gained by comparing the expected load-transfer mechanisms with the predictive error.

Experimental Research on the Ductility of High Performance Concrete Beams

2012 ◽  
Vol 166-169 ◽  
pp. 1316-1320
Author(s):  
Ying Wei Yun ◽  
Qin Luo ◽  
Il Young Jang ◽  
Shan Shan Sun ◽  
Jia Wei Zhang
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
High Performance ◽  
Shear Failure ◽  
High Performance Concrete ◽  
Concrete Beams ◽  
Seismic Energy ◽  
Concrete Compressive Strength ◽  
Concrete Members ◽  
Flexural Tests

Ductility is important in the design of reinforced concrete structures. In seismic design of reinforced concrete members, it is necessary to allow for relatively large ductility so that the seismic energy is absorbed to avoid shear failure or significant degradation of strength even after yielding of reinforcing steels in the concrete member occurs. This paper aims to present the basic data for the ductility evaluation of reinforced HPC (high performance concrete) beams. Accordingly, 10 flexural tests were conducted on full-scale structural concrete beam specimens having concrete compressive strength of 40, 60, and 70 MPa. The test results were then reviewed in terms of flexural capacity and ductility. The effect of concrete compressive strength, tension steel ratio, and shear span to beam depth ratio on ductility were investigated experimentally.

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