Study of the Behavior of Concrete under Triaxial Compression

By D. Sfer, I. Carol, R. Gettu, G. Etse. 2002

304 citations recorded by the source corpus.

An experimental study of the confined compression behavior of concrete has been performed using 150 × 300 mm cylindrical specimens subjected to hydrostatic pressure in a triaxial cell and axial loading through a servo-hydraulic testing machine. A confining stress range of 0 to 60 MPa (about twice the uniaxial compressive strength) was employed to obtain the brittle-ductile transition behavior of the material. The increase in confining pressure leads to a change in the mode of failure and an increase in the maximum axial load-carrying capacity. It is seen that, at zero or low confinement, there is distributed microcracking and several macrocracks, and the response exhibits a well-defined peak and subsequent softening. At high confinements, relatively large axial and transversal strains of over 10% have been obtained, with monotonically increasing loads leading to horizontal plateaus. There is no distributed cracking, and failure occurs with the propagation of few macrocracks. In general, the observed trends confirm and extend previous results reported in the literature. Optical microscopy shows extensive microcracking, especially in the aggregates, and pore collapse at high confinement. A preliminary interpretation of the results based on the theory of elastoplasticity is also presented.

Subfields: Civil and Structural Engineering, Materials Chemistry, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/0512706f5b54cc80987018b792957d65ac68042d

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In Civil and Structural Engineering

In Materials Chemistry

In Mechanics of Materials

Citations in the corpus

Experimental analysis of concrete behavior under high confinement: Effect of the saturation ratio (2009, background): “Most experimental results available in the literature only pertain to triaxial loadings with a moderate level of confining pressure (Li and Pugh, 1970; Kupfer and Gerstle, 1973; Wang et al., 1987; Jiang et al., 1991; Imran and Pantazopoulou, 1996; Taliercio et al., 1999; Sfer et al., 2002).”
3D mesoscale finite element modelling of concrete (2017, unknown): “Generally speaking, with the increase of lateral confinement pressure, both the compressive strength and the ductility tend to show significant enhancement [43-45].”
An analytical model for stress–strain behavior of confined concrete (2005, background): “[34] show that there is distribu ted microcracking and several macrocracks leading to a softening respo in uniaxial compression.”
Yield criteria for quasibrittle and frictional materials (2004, background): “7 represents results obtained using relationship (23) in figure (a) and experimental results by Sfer et al. (2002) in figure (b); the approximation provided by the criterion (7)-(8) is also reported as a continuous line.”
Lattice Discrete Particle Model (LDPM) for failure behavior of concrete. II: Calibration and validation (2011, methodology): “Similar failure modes were observed in the experiments [21].”
An elastic plastic damage formulation for concrete: Application to elementary tests and comparison with an isotropic damage model (2006, methodology): “The introduction of plasticity generates a change in the volumetric response from contractant to dilatant, a phenomenon which is experimentally observed (see [40] for example).”
Analysis-oriented stress–strain models for FRP–confined concrete (2007, methodology): “To this end, test results from four recent studies (Imran and Pantazopoulou 1996; Ansari and Li 1998; Sfer et al. 2002 and Tan and Sun 2004) on actively-confined concrete were collected and analysed.”