Microplane Model for Concrete. I: Stress-strain Boundaries and Finite Strain
نویسندگان
چکیده
The paper presents an improvement of the microplane model for concrete-a con~titutive model in which the nonlinear triaxial behavior is characterized by relations between ~e stress and stram cr compression the stress-strain boundaries are defined on the microplanes separately for volu~etric ~d .devlatonc compon~nts, for tension an additional boundary is defined in terms of the total normal str~~s. This IS .necess~ to .ac~eve a realistic triaxial response at large tensile strains. F?r mic~plane shear, a fnc~on law WI~ coheSion IS mtr<?duced. The present model is simpler than the prevIous mlcroplane model. Fmally, the nucroplane model IS generalized to finite, but only moderately large, strains. Verification and calibration by test data are left to a subsequent companion paper.
منابع مشابه
Microplane Model M7 for Plain Concrete. I: Formulation
Mathematical modeling of the nonlinear triaxial behavior and damage of such a complexmaterial as concrete has been a long-standing challenge in which progress has been made only in gradual increments. The goal of this study is a realistic and robust material model for explicit finite-element programs for concrete structures that computes the stress tensor from the given strain tensor and some h...
متن کاملNonlocal microplane model with strain - softening yield limits
The paper deals with the problem of nonlocal generalization of constitutive models such as microplane model M4 for concrete, in which the yield limits, called stress–strain boundaries, are softening functions of the total strain. Such constitutive models call for a different nonlocal generalization than those for continuum damage mechanics, in which the total strain is reversible, or for plasti...
متن کاملMicroplane damage model for jointed rock masses
The paper presents a new microplane constitutive model for the inelastic behavior of jointed rock masses that takes into account the mechanical behavior and geometric characteristics of cracks and joints. The basic idea is that the microplane modeling of rock masses under general triaxial loading, including compression, requires the isotropic rock matrix and the joints to be considered as two d...
متن کاملSpectral Stiffness Microplane Model for Quasibrittle Composite Laminates—Part I: Theory
The paper presents the spectral stiffness microplane model, which is a general constitutive model for unidirectional composite laminates, able to simulate the orthotropic stiffness, prepeak nonlinearity, failure envelopes, and, in tandem with the material characteristic length, also the post-peak softening and fracture. The framework of the microplane model is adopted. The model exploits the sp...
متن کاملSubstructure Model for Concrete Behavior Simulation under Cyclic Multiaxial Loading
This paper proposes a framework for the constitutive model based on the semi-micromechanical aspects of plasticity, including damage progress for simulating behavior of concrete under multiaxial loading. This model is aimed to be used in plastic and fracture analysis of both regular and reinforced concrete structures, for the framework of sample plane crack approach. This model uses multilamina...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2001