TY - JOUR
T1 - The mechanical behavior of RPC under combined shear and compressive loads
AU - Shen, Le
AU - Ding, Miao
AU - Chen, Kang
AU - Feng, Chen
AU - Yang, Bo
AU - Elchalakani, Mohamed
N1 - Funding Information:
The authors gratefully acknowledge the financial supports provided by the National Natural Science Foundation of China (No. 52078079 ), graduate scientific research and innovation foundation of Chongqing , China (Grant No. CYB19016 ), the Chongqing Talents Plan for Young Talents, China (No. CQYC201905055 ), and the Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, China .
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/8
Y1 - 2021/8
N2 - In this study, the shear behavior of reactive powder concrete (RPC) in terms of shear strength and shear slip was studied by direct shear tests on cubic specimens and the influences of water-binder ratio, steel fiber volume ratio and normal compressive stress ratio were investigated. The test results indicated that using a low water-binder ratio and a reasonable fiber content could enhance the shear strength of RPC specimens. The RPC specimen containing steel fiber will not be severed into two individual parts due to the connection of steel fiber. Moreover, the normal stress was the key contribution to the shear strength, and the residual shear capacity was mainly provided by the friction of the shear surface. The cracking of the specimens became more severe but the shear strength in the cyclic horizontal test did not decrease obviously compared with that in the monotonic horizontal test. Applying the twin-shear unified strength theory to the test data, it was indicated that the elliptic curve showed a good agreement. Therefore, the unified twin shear strength theory could predict the proper RPC strength envelope curve under combined compressive-shear stress states.
AB - In this study, the shear behavior of reactive powder concrete (RPC) in terms of shear strength and shear slip was studied by direct shear tests on cubic specimens and the influences of water-binder ratio, steel fiber volume ratio and normal compressive stress ratio were investigated. The test results indicated that using a low water-binder ratio and a reasonable fiber content could enhance the shear strength of RPC specimens. The RPC specimen containing steel fiber will not be severed into two individual parts due to the connection of steel fiber. Moreover, the normal stress was the key contribution to the shear strength, and the residual shear capacity was mainly provided by the friction of the shear surface. The cracking of the specimens became more severe but the shear strength in the cyclic horizontal test did not decrease obviously compared with that in the monotonic horizontal test. Applying the twin-shear unified strength theory to the test data, it was indicated that the elliptic curve showed a good agreement. Therefore, the unified twin shear strength theory could predict the proper RPC strength envelope curve under combined compressive-shear stress states.
KW - Direct shear test
KW - Reactive powder concrete
KW - Steel fiber content
KW - Strength analysis
KW - Water-binder ratio
UR - http://www.scopus.com/inward/record.url?scp=85107051133&partnerID=8YFLogxK
U2 - 10.1016/j.cemconcomp.2021.104071
DO - 10.1016/j.cemconcomp.2021.104071
M3 - Article
AN - SCOPUS:85107051133
SN - 0958-9465
VL - 121
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
M1 - 104071
ER -