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Modelling of Concrete Performance

Modelling of Concrete Performance PDF Author: Rajesh Chaube
Publisher: CRC Press
ISBN: 1482272164
Category : Architecture
Languages : en
Pages : 328

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Book Description
Proposing a simplified but intergrated scenario of concrete life cycle simulation method, this book examines and explains the vast amount of experimental observations related to hardening concrete using a common set of physical laws.

Modelling of Concrete Performance

Modelling of Concrete Performance PDF Author: Rajesh Chaube
Publisher: CRC Press
ISBN: 1482272164
Category : Architecture
Languages : en
Pages : 328

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Book Description
Proposing a simplified but intergrated scenario of concrete life cycle simulation method, this book examines and explains the vast amount of experimental observations related to hardening concrete using a common set of physical laws.

Computational Modelling of Concrete Structures

Computational Modelling of Concrete Structures PDF Author: Nenad Bicanic
Publisher: CRC Press
ISBN: 0203848330
Category : Technology & Engineering
Languages : en
Pages : 836

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Book Description
Since 1984 the EURO-C conference series (Split 1984, Zell am See 1990, Innsbruck 1994, Badgastein 1998, St Johann im Pongau 2003, Mayrhofen 2006, Schladming 2010) has provided a forum for academic discussion of the latest theoretical, algorithmic and modelling developments associated with computational simulations of concrete and concrete structure

Constitutive Modelling of High Strength/high Performance Concrete

Constitutive Modelling of High Strength/high Performance Concrete PDF Author: fib Fédération internationale du béton
Publisher: fib Fédération internationale du béton
ISBN: 2883940827
Category : Technology & Engineering
Languages : en
Pages : 130

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Book Description
High Strength/High Performance Concrete (HSC/HPC) continues to be the object of particular interest and extensive research, and its use in construction is increasing continuously. fib Bulletin 42 summarises the available information on the material behaviour of HSC/HPC, and develops a set of code-type constitutive relations as an extension of CEB-FIP Model Code 1990. Literature on experimental data and international guidelines, standards and recommendations were reviewed, and already-existing constitutive relations and models were evaluated. In addition to a number of material laws chosen and adjusted for this report, some new constitutive relations were developed based on the collected data. The criteria for the choice of the existing relations as well as the development of the new constitutive relations involved their simplicity and operationality (code-type mathematical formulations). Furthermore, they had to be physically sound and if possible describe the behaviour of both high-performance and normal strength concretes by a unique relation. Finally, compliance with the specifications given in the CEB-FIP Model Code 1990 was examined. This State-of-art report is intended for engineers and represents a summary of the relevant knowledge available to and possessed by the members of the Task Group at the time of its drafting.

High performance concrete recommended extensions to the model code 90 research needs

High performance concrete recommended extensions to the model code 90 research needs PDF Author: FIB – International Federation for Structural Concrete
Publisher: FIB - International Federation for Structural Concrete
ISBN: 2883940312
Category : Technology & Engineering
Languages : en
Pages : 57

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Book Description


A Moving-Boundary Problem: Modeling, Analysis and Simulation of Concrete Carbonation

A Moving-Boundary Problem: Modeling, Analysis and Simulation of Concrete Carbonation PDF Author:
Publisher: Cuvillier Verlag
ISBN: 3736918771
Category : Mathematics
Languages : en
Pages : 158

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Book Description
Environmental impact on concrete parts of buildings results in a variety of unwanted chemical and chemically-induced mechanical changes. The bulk of these changes leads to damaging and destabilization of the concrete itself or of the reinforcement embedded in the concrete. One important destabilization factor is the drop in pH near the steel bars induced by carbonation of the alkaline constituents. This is caused by atmospheric carbon dioxide diffusing in the dry parts and reacting in the wet parts of the concrete pores. The phenomenon is considered as one of the major processes inducing corrosion in concrete. A particular feature of carbonation is the formation of macroscopic sharp reaction interfaces or thin reaction layers that progress into the unsaturated concrete-based materials. The deeper cause for the formation of these patterns is not quite clear, although the major chemical and physical reasons seem to be known. The main objective of this work is to understand the movement of internal reaction layers in order to be able to predict the carbonation penetration. We describe several relevant settings of the carbonation process by means of moving-reaction interface formulations. Non-local dynamic laws are used to model the advancement of the internal layers, which separate different modeling zones. We derive them via first principles for simple geometries using the physics and chemistry of the problem. The moving-boundary methodology essentially relies on these laws, which are usually descriptions of the velocity of the reaction front position. Specifically, the accuracy of the prediction is based on these supplementary relations and on a proper definition of the reaction front position. We investigate the competition between the non-linear carbonation kinetics effects, molecular diffusion and dissolution-precipitation mechanisms, which take place in the unsaturated concrete fabrics. Mathematically, the proposed models form coupled systems of semi-linear partial differential equations in two-phase moving domains. Non-linear transmission conditions of Rankine-Hugoniot type are imposed across the inner boundary that separates the carbonated regions from the uncarbonated ones. The movement of these regions is determined via non-local dynamics laws. Local and global existence, uniqueness and stability of the weak solution with respect to the initial data and parameters are shown. Useful upper and lower bounds, for instance on the velocity of the reaction front and on the time to complete the carbonation of a given part of a concrete sample, are obtained. Monitoring of such processes enables conclusions about the behavior of the moving-reaction front and can lead to a better prediction of penetration depths and of the corrosion initiation time. The moving-boundary methodology is illustrated numerically using experimental data extracted from the literature. The theoretical predictions compare well to the data from accelerated and outdoor tests. In particular, the agreement between the experimentally observed motion trajectory of the reaction front (i.e. penetration depth vs. time curves) and that computed via the proposed models is reasonable.

Measuring, Monitoring and Modeling Concrete Properties

Measuring, Monitoring and Modeling Concrete Properties PDF Author: Maria S. Konsta-Gdoutos
Publisher: Springer Science & Business Media
ISBN: 1402051042
Category : Technology & Engineering
Languages : en
Pages : 741

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Book Description
This state-of-the-art volume covers the latest and future trends in measuring, monitoring and modeling the properties of cement based materials. The book contains 94 papers and presents the latest research work of renowned experts. It acts as a survey of the most up-to-date research in the field.

Multi-Scale Modeling of Structural Concrete

Multi-Scale Modeling of Structural Concrete PDF Author: Koichi Maekawa
Publisher: CRC Press
ISBN: 0203927206
Category : Technology & Engineering
Languages : en
Pages : 658

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Book Description
Increases in computer power have now enabled engineers to combine materials science with structural mechanics in the design and the assessment of concrete structures. The techniques developed have become especially useful for the performance assessment of such structures under coupled mechanistic and environmental actions. This allows effective management of infrastructure over a much longer life cycle, thus satisfying the requirements for durability and sustainability. This ground-breaking new book draws on the fields of materials and structural mechanics in an integrated way to address the questions of management and maintenance. It proposes a realistic way of simulating both constituent materials and structural responses under external loading and under ambient conditions. Where the research literature discusses component or element technology related to performance assessment, this book uniquely covers the subject at the level of the whole system including soil foundation, showing engineers how to model changes in concrete structures over time and how to use this for decision making in infrastructure maintenance and asset management.

Report 38: Durability of Self-Compacting Concrete - State-of-the-Art Report of RILEM Technical Committee 205-DSC

Report 38: Durability of Self-Compacting Concrete - State-of-the-Art Report of RILEM Technical Committee 205-DSC PDF Author: Geert De Schutter
Publisher: RILEM Publications
ISBN: 2351580486
Category : Compacting
Languages : en
Pages : 185

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Ultra-High Performance Concrete and High Performance Construction Materials

Ultra-High Performance Concrete and High Performance Construction Materials PDF Author: Bernhard Middendorf
Publisher: BoD – Books on Demand
ISBN: 3737608288
Category : Technology & Engineering
Languages : en
Pages : 204

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Book Description
With HiPerMat 5 on March 11-13, 2020 the 5th International Symposium on Ultra-High Performance Concrete and High Performance Construction Materials documents the actual state of development of application in the fields of: Material Science and Development, Composite Concrete Materials, Strength and Deformation behaviour of UHPC, Durability and Sustainability of UHPC, Design and Construction with UHPC, Structural Modelling and Optimisation, Lightweight Concrete Structures, High-Precision Manufacturing for Pre-Fabrication, Nanotechnology for Construction Materials, Innovative Applications, Smart Construction Materials, This volume contains the short versions (two pages) of all contributions that have been accepted for publication at HiPerMat 5.

Progress in Mechanics of Structures and Materials

Progress in Mechanics of Structures and Materials PDF Author: Peter J. Moss
Publisher: CRC Press
ISBN: 1000116174
Category : Technology & Engineering
Languages : en
Pages : 1080

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Book Description
This is a collection of peer-reviewed papers originally presented at the 19th Australasian Conference on the Mechanics of Structures and Materials by academics, researchers and practitioners largely from Australasia and the Asia-Pacific region. The topics under discussion include: composite structures and materials; computational mechanics; dynamic analysis of structures; earthquake engineering; fire engineering; geomechanics and foundation engineering; mechanics of materials; reinforced and prestressed concrete structures; shock and impact loading; steel structures; structural health monitoring and damage identification; structural mechanics; and timber engineering. It is a valuable reference for academics, researchers, and civil and mechanical engineers working in structural and material engineering and mechanics.