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A Model For The Nonlinear Time Dependent And Strengthening Analysis Of Shear Critical Frame Concrete Structures
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Book Synopsis A Model for the Nonlinear, Time-dependent and Strengthening Analysis of Shear Critical Frame Concrete Structures by : Denise Carina Santos Ferreira
Download or read book A Model for the Nonlinear, Time-dependent and Strengthening Analysis of Shear Critical Frame Concrete Structures written by Denise Carina Santos Ferreira and published by . This book was released on 2013 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear fibre beam models, due to its intrinsic simplicity and computational efficiency, are often an adequate alternative to the complex nonlinear plane and solid FE models for the assessment of entire frame structures. Nevertheless, simulations of structural concrete members undergoing relevant shear stresses cannot be performed by these models, as nonlinear shear effects and shear-bending interaction are neglected. In turn, the presence of shear stresses in cracked reinforced concrete (RC) elements leads to a rather complex resistant mechanism which numerical modelling is neither straightforward nor clearly established. Within this problematic, the formulation proposed in this thesis is an upgrade version of an existent flexural fibre beam model for the time-dependent analysis of segmentally constructed RC frames by taking into account the shear effects. The model is devised for the analysis of 2D RC and prestressed frame elements under combined axial, bending and shear forces. Shear-bending interaction is taken into account by means of a hybrid kinematic/force-based sectional approach. The key characteristics of the proposed model are: (i) at the material level RC is simulated through a smeared cracked approach with rotating cracks; (ii) at the fibre level an iterative procedure guarantees equilibrium between concrete and transversal reinforcement, allowing to compute the biaxial stress-strain state of each fibre; (iii) at the section level a uniform shear stress flow is assumed in order to estimate the internal shear stress-strain distribution and (iv) at the element level, the Timoshenko beam theory takes into account the deformation due to shear. As a result, the relevant attributes of the proposed formulation can be resumed as: (i) its capability for considering shear effects in both service and ultimate levels; (ii) the time step-by-step solution procedure enables taking into account the time-dependent response due to creep and shrinkage of concrete, temperature variations and relaxation of prestressing steel considering the multiaxial stress-strain state of the fibres and; (iii) the sequential type of analysis allows capturing the strengthening effects, accounting for the state of the structure prior to the intervention. The model is validated through experimental tests available in the literature, as well as through an experimental campaign carried out by the author. Accordingly, the capacity of the model to efficiently reproduce the behaviour of shear critical beams is demonstrated. The importance of including shear-bending interaction in the numerical analysis is underlined by comparing the results with the ones provided by the pure flexural basis model. The influence of transversal stresses on the time-dependent response of shear and bending dominant beams is also studied with the proposed model. Considering shear effects in modelling the time-dependent response of diagonally cracked RC and prestressed beams is found to be relevant. The proposed model is successfully used to predict the experimental results of a shear damaged and subsequently strengthened RC beam, available in the literature. An alternative strengthening solution for the damaged beam based on post-tensioned stirrups is numerically analysed. This technique showed to be effective to avoid brittle shear failure allowing for the development of all the flexural capacity of the repaired beam. The importance of considering previous damage in the numerical assessment of strengthened RC beams is revealed. Finally, the response of a dismantled prestressed concrete bridge, with deficient shear resistance, submitted to full-scale tests is successfully simulated with the proposed model. In addition, different strengthening proposals based on post-tensioning measures are studied for this bridge. In this manner, the capacity of the model to determine the safety of existent structures and to analyse the performance of strengthening measures is demonstrated.
Book Synopsis Computational Modelling of Concrete Structures by : Nenad Bicanic
Download or read book Computational Modelling of Concrete Structures written by Nenad Bicanic and published by CRC Press. This book was released on 2014-03-04 with total page 1108 pages. Available in PDF, EPUB and Kindle. Book excerpt: The EURO-C conference series (Split 1984, Zell am See 1990, Innsbruck 1994, Badgastein 1998, St Johann im Pongau 2003, Mayrhofen 2006, Schladming 2010, St Anton am Alberg 2014) brings together researchers and practising engineers concerned with theoretical, algorithmic and validation aspects associated with computational simulations of concrete and concrete structures. The conference reviews and discusses research advancements and the applicability and robustness of methods and models for reliable analysis of complex concrete, reinforced concrete and pre-stressed concrete structures in engineering practice. Conference topics and invited papers cover both computational mechanics and computational modelling aspects of the analysis and design of concrete and concrete structures: * Constitutive and Multiscale Modelling of Concrete * Advances in Computational Modelling * Time Dependent and Multiphysics Problems * Performance of Concrete Structures The book is of special interest to researchers in computational concrete mechanics, as well as industry experts in complex nonlinear simulations of concrete structures.
Book Synopsis Nonlinear Geometric, Material and Time Dependent Analysis of Reinforced and Prestressed Concrete Frames by : Young-Jin Kang
Download or read book Nonlinear Geometric, Material and Time Dependent Analysis of Reinforced and Prestressed Concrete Frames written by Young-Jin Kang and published by . This book was released on 1977 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance Assessment of Shear-critical Reinforced Concrete Plane Frames by : Serhan Guner
Download or read book Performance Assessment of Shear-critical Reinforced Concrete Plane Frames written by Serhan Guner and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Analysis of Reinforced Concrete Panels, Slabs and Shells for Time-dependent Effects by : Ahmad Fazlul Kabir
Download or read book Nonlinear Analysis of Reinforced Concrete Panels, Slabs and Shells for Time-dependent Effects written by Ahmad Fazlul Kabir and published by . This book was released on 1977 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behaviour and Modelling of ASR-affected Shear-critical Reinforced Concrete Structures by : Anca-Cristina Ferche
Download or read book Behaviour and Modelling of ASR-affected Shear-critical Reinforced Concrete Structures written by Anca-Cristina Ferche and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical procedures for enhanced nonlinear finite element analysis of shear-critical reinforced concrete structures affected by alkali-silica reaction (ASR) are presented. The proposed models were implemented within the algorithms of VecTor2, a nonlinear finite element analysis program applicable to concrete membrane elements. Deficiencies identified in previous formulations include the degradation of the ASR-affected concrete mechanical properties and the crack-slip behaviour for cyclic load analysis. Thus, a model that addresses the directional variations in the mechanical properties of ASR-affected concrete was developed. The residual compressive strength, modulus of elasticity, and tensile strength are evaluated based on the sustained long-term stress condition and on the severity of the expansion. An additional analytical objective was the development of a cyclic crack-slip model compatible with smeared crack formulations. The model considers two independent alternately-acting cracks within one element and it employs an empirically-developed cyclic degradation law. An experimental program focusing on the material behaviour of plain ASR-affected concrete was undertaken. Cylindrical cores extracted from cube specimens that were subjected to sustained long-term uniaxial and biaxial stress conditions were tested in compression and tension. The data iii were used for the development of an anisotropic model for the mechanical properties of ASRaffected concrete. A second component of the experimental program examined the behaviour of ASR-affected reinforced concrete panel specimens. Ten panels were constructed and tested to failure under pure shear loading conditions. They represent the first tests to investigate the behaviour of ASR-affected reinforced concrete subjected to pure shear. The test results were used to validate the modelling procedures and to contribute to a research area where conflicting experimental results were reported in the literature. Additionally, the cyclic test adds to the limited body of literature on cyclic degradation of ASR-affected elements. The test results showed that cracking strength was increased as a result of ASR-induced prestress, the deformation capacity of the reactive specimens was reduced compared to the control ones, and the ultimate strength was not adversely affected by ASR-induced deterioration. The validation analyses performed demonstrate that employing the proposed models results in more accurate predictions in terms of strength, ductility, and energy dissipation.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1974 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Mechanics of Reinforced Concrete Structures by : Günter Hofstetter
Download or read book Computational Mechanics of Reinforced Concrete Structures written by Günter Hofstetter and published by Springer. This book was released on 1995 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dieses Buch enthält die naturwissenschaftliche Grundlage zur Anwendung der rechnerunterstützten Mechanik auf starre Körper. Neben den Materialien stehen vor allen Dingen die mathematische Modellbildung sowie typische Anwendungen aus dem Ingenieurwesen.This book covers both material modelling of plain, reinforced and prestressed concrete and nonlinear structural analysis of reinforced and prestressed concrete structures. The four chapters of the book are organized as follows: survey of experimental investigations, mathematical models, the finite element method for reinforced and prestressed concrete structures, application to engineering problems.
Book Synopsis Nonlinear Material and Time Dependent Analysis of Segmentally Erected Reinforced and Prestressed Concrete Composite 3D Frame Structures by : Fouad Abdul-Kader Kasti
Download or read book Nonlinear Material and Time Dependent Analysis of Segmentally Erected Reinforced and Prestressed Concrete Composite 3D Frame Structures written by Fouad Abdul-Kader Kasti and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transactions of the American Society of Civil Engineers by : American Society of Civil Engineers
Download or read book Transactions of the American Society of Civil Engineers written by American Society of Civil Engineers and published by . This book was released on 2005 with total page 1176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. 29-30 contain papers of the International Engineering Congress, Chicago, 1893; v. 54, pts. A-F, papers of the International Engineering Congress, St. Louis, 1904.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1975 with total page 1004 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Interim Report Covering a 17-country Inventory by : International Road Federation
Download or read book An Interim Report Covering a 17-country Inventory written by International Road Federation and published by . This book was released on 1966 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Time-dependent Strength of Concrete in Compression and Shear by : Darko Tasevski
Download or read book Time-dependent Strength of Concrete in Compression and Shear written by Darko Tasevski and published by . This book was released on 2019 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mots-clés de l'auteur: sustained loading ; loading rate ; long-term strength ; nonlinear creep ; inelastic strain ; deformation capacity ; internal redistribution ; shear strength ; critical shear crack theory (CSCT) ; digital image correlation (DIC).
Book Synopsis Engineering Dynamics and Vibrations by : Junbo Jia
Download or read book Engineering Dynamics and Vibrations written by Junbo Jia and published by CRC Press. This book was released on 2018-12-12 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineering dynamics and vibrations has become an essential topic for ensuring structural integrity and operational functionality in different engineering areas. However, practical problems regarding dynamics and vibrations are in many cases handled without success despite large expenditures. This book covers a wide range of topics from the basics to advances in dynamics and vibrations; from relevant engineering challenges to the solutions; from engineering failures due to inappropriate accounting of dynamics to mitigation measures and utilization of dynamics. It lays emphasis on engineering applications utilizing state-of-the-art information.
Book Synopsis Nonlinear Behaviour and Stress-strain Based Modeling of Reinforced Concrete Structures Under Earthquake Induced Bending and Varying Axial Loads by :
Download or read book Nonlinear Behaviour and Stress-strain Based Modeling of Reinforced Concrete Structures Under Earthquake Induced Bending and Varying Axial Loads written by and published by . This book was released on 1988 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Analysis of the Time-dependent Behaviour of Reinforced Concrete Frames by : A. Kawano
Download or read book Nonlinear Analysis of the Time-dependent Behaviour of Reinforced Concrete Frames written by A. Kawano and published by . This book was released on 1995 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modelling and Analysis of Reinforced Concrete Structures for Dynamic Loading by : Christian Meyer
Download or read book Modelling and Analysis of Reinforced Concrete Structures for Dynamic Loading written by Christian Meyer and published by Springer. This book was released on 2014-05-04 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
