Auteur Zdenek P. Bazant
Documents disponibles écrits par cet auteur (13)
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Zdenek P. Bazant, Auteur ; Arvid Naess, Éditeur scientifique ; Novak, Drahomir ; Vorechovsky, Miroslav, Auteur |An improved form of a recently derived energetic-statistical formula for size effect on the strength of quasibrittle structures failing at crack initiation is presented and exploited to perform stochastic structural analysis without the burden o[...]
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Qiang Yu, Auteur ; Zdenek P. Bazant, Auteur |This paper demonstrates the size effect on the shear strength of reinforced concrete (RC) beams with stirrups and does so in two separate and independent ways: (1) by fracture mechanics, based on finite-element analysis calibrated by a large bea[...]
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Jia-Liang Le, Auteur ; Jan Elias, Auteur ; Zdenek P. Bazant, Auteur |Engineering structures must be designed for an extremely low failure probability, Pf
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Vít Smilauer, Auteur ; Zdenek P. Bazant, Auteur |A powerful and robust numerical homogenization method based on fast Fourier transform (FFT) is formulated to identify the viscoelastic behavior of calcium silicate hydrates (C-S-H) in hardened cement paste from its heterogeneous composition. The[...]
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Zdenek P. Bazant, Auteur ; Mija H. Hubler, Auteur ; Milan Jirásek, Auteur |Based on asymptotic considerations, this paper develops an improved approximate formula for estimating the relaxation function from the given compliance function of concrete, which is considered as aging, linearly viscoelastic material. Compared[...]
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Zdenek P. Bazant, Auteur ; Mathieu Verdure, Auteur |Progressive collapse is a failure mode of great concern for tall buildings, and is also typical of building demolitions. The most infamous paradigm is the collapse of the World Trade Center towers. After reviewing the mechanics of their collapse[...]
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Zdenek P. Bazant, Auteur ; Caner, Ferhun C., Auteur |Presented is a new microplane model for concrete, labeled M5, which improves the representation of tensile cohesive fracture by eliminating spurious excessive lateral strains and stress locking for far postpeak tensile strains. To achieve improv[...]
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Zdenek P. Bazant, Auteur ; Caner, Ferhun C., Auteur |Following the formulation of the constitutive model in the preceding Part I in this issue, the present Part II addresses the problems of computtational algorithm and convergence of iterations. Typical numerical responses are demonstrated and the[...]
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Beghini, Alessandro, Auteur ; Zdenek P. Bazant, Auteur ; Zhou, Yong ; Gouirand, Olivier ; Caner, Ferhun C. ; Xi, Yunping, Éditeur scientifique |Despite impressive advances, the existing constitutive and fracture models for fiber-reinforced concrete (FRC) are essentially limited to uniaxial loading. The microplane modeling approach, which has already been successful for concrete, rock, c[...]
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Peter Grassl, Auteur ; Zdenek P. Bazant, Auteur |The modeling of statistical size effect of concrete structures that fail at crack initiation is studied, with special attention to the interaction between the autocorrelation length and the size of the failure zone. The mechanical failure of con[...]
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Zdenek P. Bazant, Auteur ; Qiang Yu, Auteur ; Xi, Yunping, Éditeur scientifique |The effect of V-notches (or reentrant corners) on fracture propagation has been analyzed for brittle materials, but not for quasi—brittle materials such as concrete, marked by a large material characteristic length producing a strong size effect[...]
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In cohesive fracture of quasi-brittle materials such as concrete, rock, fiber composites, tough ceramics, rigid foams, sea ice, and wood, one can distinguish six simple and easily modeled asymptotic cases: the asymptotic behaviors of very small [...]
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Zdenek P. Bazant, Auteur ; Jia-Liang Le, Auteur ; Frank R. Greening, Auteur |Previous analysis of progressive collapse showed that gravity alone suffices to explain the overall collapse of the World Trade Center Towers. However, it remains to be determined whether the recent allegations of controlled demolition have any [...]
