Hikaru Nakamura, Takuya Iwamoto, Li Fu, Yoshihito Yamamoto, Taito Miura, Yasar Hanifi Gedik
Journal of Advanced Concrete Technology, 16, 563-576, 2018
In order to enhancement accuracy of shear design of reinforced concrete (RC) beams,
detail understanding of the shear resistance mechanism is required. This study evaluated the shear resistance mechanism
of RC beams based on arch and beam actions by using three dimensional Rigid-Body-Spring-Method (3-D RBSM).
Firstly, RC deep and slender beams with and without shear reinforcement failed in shear were tested to measure local behavior.
Then, the validity of local behaviors obtained from 3-D RBSM was confirmed by comparing with the test results and
the applicability of decoupling of shear resistance mechanism using simulated stress distribution was presented.
Moreover, the contributions of arch and beam actions in RC beams until failure stage were investigated numerically
by changing the shear reinforcement ratio and shear span to depth ratio and was compared with the current shear
design recommendations in JSCE Standard Specification.
As a significant finding, the numerical results upon the quantitatively evaluation of shear resistance mechanisms
that the shear strength of RC beam could be evaluated without classification of deep beams and slender beams was presented.