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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: Christian Meyer Publisher: Springer ISBN: 3709125243 Category : Technology & Engineering Languages : en Pages : 257
Book Description
A comprehensive review of the material behavior of concrete under dynamic loads, especially impact and impuls, opens the volume. It is followed by a summary of the various analytical tools available to engineers interested in analyzing the nonlinear behavior of reinforced concrete members for dynamic load. These range from relatively simple and practice-oriented push-over analysis to sophisticated layered finite element models. Important design-related topics are discussed, with special emphasis on performance of concrete frames subjected to seismic loads. The significance of modern software systems is recognized by including extensive examples. For readers not current in dynamic analysis methods, an appendix contains a review of the mathematical methods most commonly used for such analysis.
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: 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: Michael D. Kotsovos Publisher: CRC Press ISBN: 1498712312 Category : Technology & Engineering Languages : en Pages : 376
Book Description
A Powerful Tool for the Analysis and Design of Complex Structural ElementsFinite-Element Modelling of Structural Concrete: Short-Term Static and Dynamic Loading Conditions presents a finite-element model of structural concrete under short-term loading, covering the whole range of short-term loading conditions, from static (monotonic and cyclic) to
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: Horst Werkle Publisher: Springer Nature ISBN: 3030498409 Category : Science Languages : en Pages : 709
Book Description
The book introduces the basic concepts of the finite element method in the static and dynamic analysis of beam, plate, shell and solid structures, discussing how the method works, the characteristics of a finite element approximation and how to avoid the pitfalls of finite element modeling. Presenting the finite element theory as simply as possible, the book allows readers to gain the knowledge required when applying powerful FEA software tools. Further, it describes modeling procedures, especially for reinforced concrete structures, as well as structural dynamics methods, with a particular focus on the seismic analysis of buildings, and explores the modeling of dynamic systems. Featuring numerous illustrative examples, the book allows readers to easily grasp the fundamentals of the finite element theory and to apply the finite element method proficiently.
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: Christian Meyer
Author: Ermakova A.V.
Author: Grzegorz Gajer
Author: Guenter Axel Rombach
Author: Michael D. Kotsovos
Author: Jeremy Isenberg
Author: Yu Huang
Author: Horst Werkle
Author: Pui-Lam Ng