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Biaxial behaviour of plain concrete subjected to dynamic compression with constant lateral stress
Author(s) -
Yan Dongming,
Xu Shilang,
Chen Genda,
Li Hedong
Publication year - 2014
Publication title -
structural concrete
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.912
H-Index - 34
eISSN - 1751-7648
pISSN - 1464-4177
DOI - 10.1002/suco.201300057
Subject(s) - overburden pressure , materials science , strain rate , compression (physics) , lateral strain , compressive strength , composite material , structural engineering , stress (linguistics) , constant (computer programming) , cylinder stress , geotechnical engineering , ultimate tensile strength , geology , engineering , linguistics , philosophy , computer science , programming language
This study investigates the dynamic biaxial behaviour of concrete by testing more than 60 cubic specimens on a custom‐designed, servo‐hydraulic‐controlled machine. Each specimen was axially loaded in compression at a constant strain rate of 10 –5 , 10 –4 , 10 –3 or 10 –2 s –1 while two opposite side faces were subjected to a constant confining pressure and the other two side faces were free. The confining pressure applied to each specimen was 0, 30.5, 61.0 or 91.5 % of its uniaxial compressive strength. Test results indicate that the biaxial strength of concrete increases with strain rate at a reduced slope as confining pressure increases. The failure mode of the concrete specimens was basically unaffected by the strain rate. An empirical relation for the ultimate strength of concrete in a biaxial stress state was developed taking into account the effects of both confinement and strain rate.