4 edition of Modeling the mechanical response of concrete in relation to its microstructural characteristics found in the catalog.
Modeling the mechanical response of concrete in relation to its microstructural characteristics
Thesis (M.A.Sc.)--University of Toronto, 1993.
|Series||Canadian theses = Thèses canadiennes|
|The Physical Object|
|Pagination||2 microfiches : negative.|
Rutting is one of the main distress modes of asphalt pavements, especially after prolonged warm periods, and thus a great deal of research has been focused on the development of a rheological parameter that would address the rutting susceptibility of both unmodified and modified bituminous binders. In this study the Multiple Stress Creep Recovery (MSCR) test method is used to investigate the. Mechanical properties of materials have been one of the most fundamental and widely studied areas in materials, owing to its crucial importance for real‐life applications. For centuries, the development of materials has solely relied on the modifications of its composition to alter mechanical properties.
Steel-concrete interaction, fibre-reinforced concrete, and masonry Dynamic behaviour: from seismic retrofit to impact simulation Computational Modelling of Concrete Structures is of special interest to academics and researchers in computational concrete mechanics, as well as industry experts in complex nonlinear simulations of concrete structures. Modeling the Mechanical Response of Structural Materials [Minerals, Metals and Materials Society Stuctural Materials Committee, Minerals, Metals and Materials Society. Meeting (th: San Antonio, Tex.), Taleff, Eric M., Mahidhara, R.] on *FREE* shipping on qualifying offers. Modeling the Mechanical Response of Structural Materials.
Relation of pore volume and strength Ryshkewitch’s equation and Schiller’s equation Mechanical properties modeling Hydration reaction characteristic äDegree of hydration of expansive additive and cement å Fig. 1 Flow of mechanical properties modeling of concrete using expansive additive. evolution and its effect on fracture behavior of concrete subjected to freeze-thaw cycles Yijia Dong1,2, Chao Su1, Pizhong Qiao3,4 and LZ Sun2 Abstract Concrete structures in cold regions are exposed to cyclic freezing and thawing environment, leading to degraded mechanical and fracture properties of concrete due to microstructural damage.
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A simplified constitutive model that recognizes and incorporates the properties of microstructure and its influence on mechanical response is developed in this paper: The model evaluates uniaxial compressive stress at any level of axial strain, using a strain-dependent estimate of material by: A simplified constitutive model is presented that recognizes and incorporates the properties of microstructure and its influence on mechanical response of plain concrete.
The model evaluates uniaxial compressive stress at any level of axial strain, using a strain-dependent estimate of material stiffness. The initial elastic modulus of uncracked concrete is assessed, based on water-cement Cited by: The EURO-C conference series (SplitZell am SeeInnsbruckBadgasteinSt.
Johann im PongauMayrhofenSchladmingSt. Anton am Arlbergand Bad Hofgastein ) brings together researchers and practising engineers concerned with theoretical, algorithmic and validation aspects associated with computational simulations of concrete and concrete.
Comparison of the model predictions with independent experimental measurements illustrates the capabilities of the model in capturing the coupled moisture-mechanical response of asphalt concrete.
They utilized a thermo-mechanical constitutive relationship (Darabi et al., ) to simulate the mechanical response of asphalt concrete subjected to mechanical loading. Kringos et al. (a) and Graham () simulated an idealized 2D FE microstructural representation of asphalt concrete to investigate the response of moisture-conditioned Cited by: In addition, the relationship between the mechanical characteristics and microstructures can be established, and the strain rate-dependent compressive response of an asphalt mixture is characterized.
Besides the mechanical characteristics detected using nanoindentation, concrete’s microstructural morphology and components are important to. In modeling the response of a reinforced concrete structural element, it is reasonable to incorporate both the microscopic response as well as the random nature of the concrete into a macromodel.
The macromodel describes the response of a body of concrete that is many times the size of individual pieces of aggregate or of continuous zones of hcp.
CONCRETE-STEEL BOND MODEL Introduction The utility of reinforced concrete as a structural material is derived from the combi-nation of concrete that is strong and relatively durable in compression with reinforcing steel that is strong and ductile in tension.
Maintaining composite action requires transfer of load between the concrete and steel. accordingtothedescription ofelasticity given earlier (immediate response,fullrecovery), andit is also linear in its relation between stress and strain (or equivalently, force and deformation).
Therefore a Hookean material is linear elastic, and materials engineers use these descriptors in-terchangeably. Poisson’s ratio varies between for high strength concrete and for weak mixes. It is normally taken as for strength design and for serviceability criteria.
Durability of concrete. Durability of concrete is its ability to resist its disintegration and decay. Concrete is a composite material that consists of a binding medium and aggregate particles and can be formed in several types.
It may be considered to consist of three phases: a cement paste, the aggregate, and the interfacial transition zone (ITZ) between them.
In addition to ordinary Portland cement, the essential components of the base of concrete are aggregates and water.
The effects of varying the characteristics of voids are assessed in terms of stress distribution and damage evolution. Finally, a probabilistic analysis is conducted to evaluate the impacts of random void morphologies on the mechanical responses of asphalt concrete microstructural representations.
Connection between the microstructural characteristics and mechanical responses of loess soils is interpreted. Abstract A series of laboratory tests were conducted on intact specimens of two loess soils to characterize their collapsibility, shear strength, microstructure and mineralogy.
The proposed model is able to predict the complete mechanical response of concrete materials under monotonic loading, the crack patterns associated with different loading stages, localization of deformation, and the effect of size on nominal strength. Model predictions are in good agreement with documented experimental work.
Microstructural Modeling of Asphalt Concrete using a Coupled Moisture-Mechanical Constitutive Relationship Article in International Journal of Solids and Structures 51(25) September with.
Microstructural characteristics of the specimens with different types of aggregate were examined using X-ray micro-computed tomography. The thermal (thermal conductivity) and mechanical (compressive strength) properties of the lightweight concrete specimens were evaluated experimentally and.
The shear deformation behavior of two types of rebar steels, standard grade LC steel and MMFX-9Cr MC steel, was investigated as a function of the strain rate and total plastic strain.
Comparing microstructural characteristics with the mechanical responses of 24 specimens yielded the following conclusions. Each of these mechanisms is modeled separately within the microstructural association model and combined using a rational mechanical analog approach.
The model is characterized using only experiments on asphalt mastic at different concentrations, but is verified with its ability to upscale to the modulus of asphalt concrete.
This paper presents an empirical model for the calculation of the main characteristics of concrete confined by means of hoops or spirals. The model included in CEB-FIP Model Code was initially used as a basis, its validity was checked against experimental results provided by 17 researchers for more than specimens.
About this book This title provides a comprehensive overview of all aspects of the mechanical behavior of concrete, including such features as its elastoplasticity, its compressive and tensile strength, its behavior over time (including creep and shrinkage, cracking and fatigue) as well as modeling techniques and its response to various stimuli.
2 days ago Response surface methodology is a set of mathematical and statistical tools used for building an analytical model in which a response (an output) is related to many input variables which are independent. The method can be used in assessing the effects of each of the parameters and the relationship between them on the response [27,28,29].
In.Continuum Coupled Moisture–Mechanical Damage Model for Asphalt Concrete Show all authors. Maryam Shakiba. J. M. Relationship of Aggregate Characteristics to the Effect of Water on Bituminous Paving Mixtures. Three-Dimensional Microstructural Modeling of Asphalt Concrete Using a Unified Viscoelastic–Viscoplastic–Viscodamage Model.The aim of Cement and Concrete Research is to publish the best research on the materials science and engineering of cement, cement composites, mortars, concrete and other allied materials that incorporate cement or other mineral binders.
In doing so, the journal will focus on reporting major results of research on the properties and performance of cementitious materials; novel experimental.