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Author: fib Fédération internationale du béton Publisher: fib Fédération internationale du béton ISBN: 2883940851 Category : Technology & Engineering Languages : en Pages : 3
Book Description
Non-linear computer analysis methods have seen remarkable advancement in the last half-century. The state-of-the-art in non-linear finite element analysis of reinforced concrete has progressed to the point where such procedures are close to being practical, every-day tools for design office engineers. Non-linear computer analysis procedures can be used to provide reliable assessments of the strength and integrity of damaged or deteriorated structures, or of structures built to previous codes, standards or practices deemed to be deficient today. They can serve as valuable tools in assessing the expected behaviour from retrofitted structures, or in investigating and rationally selecting amongst various repair alternatives. fib Bulletin 45 provides an overview of current concepts and techniques relating to computer-based finite element modelling of structural concrete. It summarises the basic knowledge required for use of nonlinear analysis methods as applied to practical design, construction and maintenance of concrete structures, and attempts to provide a diverse and balanced portrayal of the current technical knowledge, recognizing that there are often competing and conflicting viewpoints. This report does not give advice on picking one model over another but, rather, provides guidance to designers on how to use existing and future models as tools in design practice, in benchmarking of their models against established and reliable test data and in selecting an appropriate safety factor as well as recognising various pitfalls. fib Bulletin 45 is intended for practicing engineers, and therefore focuses more on practical application and less on the subtleties of constitutive modelling.
Author: fib Fédération internationale du béton Publisher: fib Fédération internationale du béton ISBN: 2883940851 Category : Technology & Engineering Languages : en Pages : 3
Book Description
Non-linear computer analysis methods have seen remarkable advancement in the last half-century. The state-of-the-art in non-linear finite element analysis of reinforced concrete has progressed to the point where such procedures are close to being practical, every-day tools for design office engineers. Non-linear computer analysis procedures can be used to provide reliable assessments of the strength and integrity of damaged or deteriorated structures, or of structures built to previous codes, standards or practices deemed to be deficient today. They can serve as valuable tools in assessing the expected behaviour from retrofitted structures, or in investigating and rationally selecting amongst various repair alternatives. fib Bulletin 45 provides an overview of current concepts and techniques relating to computer-based finite element modelling of structural concrete. It summarises the basic knowledge required for use of nonlinear analysis methods as applied to practical design, construction and maintenance of concrete structures, and attempts to provide a diverse and balanced portrayal of the current technical knowledge, recognizing that there are often competing and conflicting viewpoints. This report does not give advice on picking one model over another but, rather, provides guidance to designers on how to use existing and future models as tools in design practice, in benchmarking of their models against established and reliable test data and in selecting an appropriate safety factor as well as recognising various pitfalls. fib Bulletin 45 is intended for practicing engineers, and therefore focuses more on practical application and less on the subtleties of constitutive modelling.
Author: fib Fédération internationale du béton Publisher: fib Fédération internationale du béton ISBN: 2883940924 Category : Technology & Engineering Languages : en Pages : 349
Book Description
The second edition of the Structural Concrete Textbook is an extensive revision that reflects advances in knowledge and technology over the past decade. It was prepared in the intermediate period from the CEP-FIP Model Code 1990 (MC90) tofib Model Code 2010 (MC2010), and as such incorporates a significant amount of information that has been already finalized for MC2010, while keeping some material from MC90 that was not yet modified considerably. The objective of the Textbook is to give detailed information on a wide range of concrete engineering from selection of appropriate structural system and also materials, through design and execution and finally behaviour in use. The revised fib Structural Concrete Textbook covers the following main topics: phases of design process, conceptual design, short and long term properties of conventional concrete (including creep, shrinkage, fatigue and temperature influences), special types of concretes (such as self compacting concrete, architectural concrete, fibre reinforced concrete, high and ultra high performance concrete), properties of reinforcing and prestressing materials, bond, tension stiffening, moment-curvature, confining effect, dowel action, aggregate interlock; structural analysis (with or without time dependent effects), definition of limit states, control of cracking and deformations, design for moment, shear or torsion, buckling, fatigue, anchorages, splices, detailing; design for durability (including service life design aspects, deterioration mechanisms, modelling of deterioration mechanisms, environmental influences, influences of design and execution on durability); fire design (including changes in material and structural properties, spalling, degree of deterioration), member design (linear members and slabs with reinforcement layout, deep beams); management, assessment, maintenance, repair (including, conservation strategies, risk management, types of interventions) as well as aspects of execution (quality assurance), formwork and curing. The updated Textbook provides the basics of material and structural behaviour and the fundamental knowledge needed for the design, assessment or retrofitting of concrete structures. It will be essential reading material for graduate students in the field of structural concrete, and also assist designers and consultants in understanding the background to the rules they apply in their practice. Furthermore, it should prove particularly valuable to users of the new editions of Eurocode 2 for concrete buildings, bridges and container structures, which are based only partly on MC90 and partly on more recent knowledge which was not included in the 1999 edition of the Textbook.
Author: Ermakova A.V. Publisher: Издательство АСВ ISBN: 5930938792 Category : Technology & Engineering Languages : en Pages : 114
Book Description
The work presents the theoretical basis of Additional Finite Element Method (AFEM), which is a variant of the Finite Element Method (FEM) for analysis of reinforced concrete structures at limit state. AFEM adds to the traditional sequence of problem by FEM the units of the two well-known methods of the structural design: method of additional loads and limit state method. The problem is solved by introduction of ideal failure models and additional design diagrams formed from additional finite elements, where each AFE describes the limit state reached by the main element. The main relations defining the properties of AFEs as well as the examples of the use of Additional Finite Element Method for analysis of reinforced concrete structures at limit state are given in the work too.
Author: Youssef Ghaly Hanna Publisher: ISBN: Category : Languages : en Pages :
Book Description
"A finite element model which uses the advanced endochronic stress-strain relationship and incorporates the results of the investigation on post-cracking behaviour and steel-concrete interface behaviour is formulated and used in the analysis of several reinforced concrete members. Analysis results are compared with the available experimental data and with the results obtained by other researchers. Excellent correlation was obtained between the computed values and the experimental results." --
Author: Guenter Axel Rombach Publisher: Thomas Telford ISBN: 9780727732743 Category : Architecture Languages : en Pages : 302
Book Description
In Finite Element Design of Concrete Structures: practical problems and their solutions the author addresses this blind belief in computer results by offering a useful critique that important details are overlooked due to the flood of information from the output of computer calculations. Indeed, errors in the numerical model may lead in extreme cases to structural failures as the collapse of the so-called Sleipner platform has demonstrated.
Author: Jeremy Isenberg Publisher: ISBN: Category : Mathematics Languages : en Pages : 734
Book Description
This collection contains 10 papers discussing finite element analysis of reinforced concrete structures presented at an international workshop held in New York, New York, June 2-5, 1991.
Author: Yu Huang Publisher: Cambridge Scholars Publishing ISBN: 152755354X Category : Technology & Engineering Languages : en Pages : 305
Book Description
This book details the theory and applications of finite element (FE) modeling of post-tensioned (PT) concrete structures, and provides the updated MATLAB code (as of 2019). The challenge of modeling PT prestressed concrete structures lies in the treatment of the interface between the concrete and prestressing tendons. Using MATLAB, this study develops an innovative nonlinear FE formulation which incorporates contact techniques and engineering elements to considerably reduce the need of computational power. This FE formulation has the ability to simulate different PT frame systems with fully bonded, fully unbonded or partially bonded tendons, as well as actual sliding behavior and frictional effects in the tendons. It also allows for the accurate simulation of anchor seating loss.
Author: Pui-Lam Ng Publisher: Open Dissertation Press ISBN: 9781361429570 Category : Languages : en Pages :
Book Description
This dissertation, "Constitutive Modelling and Finite Element Analysis of Reinforced Concrete Structures" by Pui-lam, Ng, 吳沛林, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled CONSTITUTIVE MODELLING AND FINITE ELEMENT ANALYSIS OF REINFORCED CONCRETE STRUCTURES Submitted by NG Pui Lam for the Degree of Doctor of Philosophy at The University of Hong Kong in September 2007 This thesis is divided into two parts. The first part is devoted to the development of new constitutive models of reinforced concrete. To properly simulate the stress path dependence of concrete, the author devises herein the nonlinear damage model. In this model, the microcracking induced by stressing of concrete is viewed as damage, which is described by two quantifiable damage parameters: the damaged modulus and the residual strain. On the shear behaviour of concrete, it is postulated that the shear stress envelope of concrete is governed by two criteria: the Mohr-Coulomb criterion of maximum shear stress and the non- orthogonal minor crack criterion of maximum shear stress. A stress path dependent shear stress-strain relation of concrete is established. Time dependent analysis of shrinkage and creep effects in concrete structures requires storage of stress histories of finite elements for evaluation of creep. This poses a hindrance to the analysis of large problems. To circumvent the memorisation of stress histories, a new multi-layer visco-elastic concrete creep model is developed. Besides, for structures constructed in stages, re-analysis of the partially completed structure in each stage is necessary in response to changes in structural configurations during construction. Herein, the locked-in strain is introduced to allow analysing altogether the completed and uncompleted portions, thus eliminating the efforts on re-meshing and location matching of element stresses and deformations. The interactions between concrete and reinforcement are simulated in conjunction with the discrete modelling of reinforcing bars. The Goodman interface element is adapted for modelling concrete-to-reinforcement bond with the implementation of nonlinear bond stress-slip relation. Besides, the dowel action for discrete reinforcing bars is modelled based on the beam on elastic foundation theory. The second part of this thesis is on the analysis of reinforced concrete structures. The tension stiffening phenomenon in cracked concrete beams is investigated. From finite element analysis, stress distributions at beam cross-sections are revealed and based on which a tensile stress block is derived. The tensile stress block enables assessment of beam deflections in structural design process without resorting to finite element analysis for each individual beam. Furthermore, the post- peak behaviour of beams and deep beams is analysed. The effects of concrete residual strain, bond slip, and dowel action on beam responses are studied. The finite element programme is applied to the analysis of shear transfer across joints between concrete units, with particular reference to precast segmental post-tensioned bridges. To model the epoxy adhesive between joint surfaces, the epoxy element is developed from the nonlinear linkage element. It is found that with the joint surfaces pressing against each other by prestressing, the shear transfer capacity of flat joints is already sufficient (comparable to intact concrete), and the provision of shear keys at joint surfaces is superfluous from the shear stren
Author: fib Fédération internationale du béton
Author: fib Fédération internationale du béton
Author: fib Fédération internationale du béton
Author: Ermakova A.V.
Author: Laura N. Lowes
Author: Youssef Ghaly Hanna
Author: Guenter Axel Rombach
Author: Jeremy Isenberg
Author: Grzegorz Gajer
Author: Yu Huang
Author: Pui-Lam Ng