Diseño prestacional para la durabilidad de estructuras de hormigón armado PDF Download
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Author: Carmen Andrade
Publisher:
ISBN: 9788474024005
Category :
Languages : es
Pages : 360
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Book Description
Author: Enric Vázquez
Publisher: RILEM Publications
ISBN: 9782912143525
Category : Building materials
Languages : en
Pages : 604
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Book Description
Author: Carmen Andrade
Publisher:
ISBN: 9788474024005
Category :
Languages : es
Pages : 360
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Book Description
Author: FIB – International Federation for Structural Concrete
Publisher: FIB - International Federation for Structural Concrete
ISBN: 2883940401
Category : Technology & Engineering
Languages : en
Pages : 191
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Book Description
Author: R. Venkata Rao
Publisher: Springer Science & Business Media
ISBN: 144712748X
Category : Technology & Engineering
Languages : en
Pages : 323
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Book Description
Mechanical design includes an optimization process in which designers always consider objectives such as strength, deflection, weight, wear, corrosion, etc. depending on the requirements. However, design optimization for a complete mechanical assembly leads to a complicated objective function with a large number of design variables. It is a good practice to apply optimization techniques for individual components or intermediate assemblies than a complete assembly. Analytical or numerical methods for calculating the extreme values of a function may perform well in many practical cases, but may fail in more complex design situations. In real design problems, the number of design parameters can be very large and their influence on the value to be optimized (the goal function) can be very complicated, having nonlinear character. In these complex cases, advanced optimization algorithms offer solutions to the problems, because they find a solution near to the global optimum within reasonable time and computational costs. Mechanical Design Optimization Using Advanced Optimization Techniques presents a comprehensive review on latest research and development trends for design optimization of mechanical elements and devices. Using examples of various mechanical elements and devices, the possibilities for design optimization with advanced optimization techniques are demonstrated. Basic and advanced concepts of traditional and advanced optimization techniques are presented, along with real case studies, results of applications of the proposed techniques, and the best optimization strategies to achieve best performance are highlighted. Furthermore, a novel advanced optimization method named teaching-learning-based optimization (TLBO) is presented in this book and this method shows better performance with less computational effort for the large scale problems. Mechanical Design Optimization Using Advanced Optimization Techniques is intended for designers, practitioners, managers, institutes involved in design related projects, applied research workers, academics, and graduate students in mechanical and industrial engineering and will be useful to the industrial product designers for realizing a product as it presents new models and optimization techniques to make tasks easier, logical, efficient and effective. .
Author: Arántzazu EspañaRoch
Publisher:
ISBN:
Category :
Languages : es
Pages :
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Book Description
La corrosión del acero de refuerzo es una de las principales causas de deterioro en las estructuras de hormigón. Las principales consecuencias de la corrosión de las armaduras son la reducción de la sección transversal de la barra, el desprendimiento y fisuración del recubrimiento y el deterioro de las características de adherencia entre el hormigón y el acero. Dichas consecuencias conllevan a la disminución de la capacidad portante máxima, la pérdida de la capacidad de servicio y la seguridad estructural. En la actualidad existen dos teorías sobre si afecta o no la fisuración en la corrosión de las armaduras, llegando a ser contradictorias. La normativa española, EHE‐08 (Gobierno de España, 2008) trata la fisuración con una de las teorías en el artículo 49o del Capítulo 11, prescribiendo anchos de fisura variables en función del ambiente, que pueden llegar a condicionar el diseño, mientras que en el método del Anejo 9 no considera la influencia de la fisuración. Los códigos y normativas consideran que los criterios de durabilidad se deben satisfacer en términos de ancho de fisura, recubrimiento del hormigón y cantidad de cemento, los cuales deben ser satisfechos independientemente. Por este motivo, la fisuración tiene una gran influencia en la comprobación de la durabilidad y limitar la fisura es fundamental. Sin embargo, estos parámetros interactúan entre sí, abriendo la posibilidad de un diseño optimizado para una vida útil equivalente, no considerada en las normativas actuales, que pueden hacer que, aunque aparezcan microfisuras, la estructura siga teniendo la durabilidad adecuada para el tiempo para el que ha sido proyectado. El objetivo de este TFM es estudiar cómo afecta la fisura en el cálculo de la durabilidad y determinar cuáles son los criterios para un diseño optimizado, en el que se tengan en cuenta factores como el recubrimiento y las características del hormigón, con un ancho de fisura menor que 0,5 mm. De este modo, se hará una comparativa sobre la armadura necesaria para cumplir con la normativa y la armadura necesaria en el caso del diseño optimizado.
Author: Shauna Mallory-Hill
Publisher: John Wiley & Sons
ISBN: 0470657596
Category : Technology & Engineering
Languages : en
Pages : 360
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Book Description
Building Performance Evaluation (BPE) informs and enhances the usability and sustainability of building designs with lessons learned from evaluation of building performance throughout the building life cycle, from initial planning through occupancy to adaptive re-use. A key feature of BPE is that it examines design and technical performance of buildings alongside human performance criteria. That is, it seeks to examine facilities in order to determine whether they will work for the people that will use and occupy them. Rigorous BPE helps to improve design practice by providing feedback on the effectiveness of the choices made about the building to ensure that its design is optimised for stakeholders’ uses. The overarching theme for Enhancing Building Performance is to present the next generation of BPE work. The book provides an updated systematic approach for BPE as well as chapters written by experts from around the world who demonstrate how to apply BPE to enhance building design. Topics covered include: evidence-based and integrative design processes, evaluation methods and tools, and education and knowledge transfer. In addition, case studies provide specific examples of how BPE has been used to study such things as the impact of workplace design on human productivity and innovation. Written primarily for design professionals and facility managers who wish to use BPE to deliver improved building performance that is responsive to the needs of stakeholders, Enhancing Building Performance will also be of great value to researchers and students across a range of architecture and construction disciplines.
Author: fib Fédération internationale du béton
Publisher: fib Fédération internationale du béton
ISBN: 2883940800
Category : Technology & Engineering
Languages : en
Pages : 151
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Book Description
fib Bulletin 40 deals mainly with the use of FRP bars as internal reinforcement for concrete structures. The background of the main physical and mechanical properties of FRP reinforcing bars is presented, with special emphasis on durability aspects. For each of the typical ultimate and serviceability limit states, the basic mechanical model is given, followed by different design models according to existing codes or design guidelines. Composite FRP materials are still relatively new in construction and most engineers are unfamiliar with their properties and characteristics. The second chapter of this bulletin therefore aims to provide practising engineers with the necessary background knowledge in this field, and also presents typical products currently available in the international market. The third chapter deals with the issue of durability and identifies the parameters that can lead to deterioration, which is necessary information when addressing design issues. A series of parameters is used to identify the allowable stress in the FRP after exposure for a specified period of time in a specific environment. The bulletin covers the issues of Ultimate Limit States (primarily dealing with flexural design), Serviceability Limit States (dealing with deflections and cracking), Shear and Punching Shear and Bond and Tension Stiffening. It provides not only the state-of-the-art but also in many cases ideas for the next generation of design guidelines. The final chapter deals with the fundamental issue of design philosophy. The use of these new materials as concrete reinforcement has forced researchers to re-think many of the fundamental principles used until now in RC design. The bulletin ends with a discussion of a possible new framework for developing partial safety factors to ensure specific safety levels that will be flexible enough to cope with new materials.
Author: Rayner M. Mayer
Publisher:
ISBN: 9780852989579
Category : Blades
Languages : en
Pages : 246
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Book Description
Author: fib Fédération internationale du béton
Publisher: fib Fédération internationale du béton
ISBN: 9782883940758
Category : Technology & Engineering
Languages : en
Pages : 234
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Book Description
fib Bulletin 35 is the first bulletin to publish documentation from an fib short course. These courses are held worldwide and cover advanced knowledge of structural concrete in general, or specific topics. They are organized by fib and given by internationally recognized experts in fib, often supplemented with local experts active in fib. They are based on the knowledge and expertise from fib's ten Commissions and nearly fifty Task Groups. fib Bulletin 35 presents the course materials developed for the short course "Retrofitting of Concrete Structures through Externally Bonded FRP, with emphasis on Seismic Applications", given in Ankara and Istanbul in June 2005. The course drew on expertise both from outside Turkey and from the large pool of local experts on this subject. In most countries of the world, the building stock is ageing and needs continuous maintenance or repair. Moreover, the majority of existing constructions are deficient in the light of current knowledge and design codes. The problem of structural deficiency of existing constructions is especially acute in seismic regions, as, even there, seismic design of structures is relatively recent. The direct and indirect costs of demolition and reconstruction of structurally deficient constructions are often prohibitive; furthermore they entail a substantial waste of natural resources and energy. Therefore, structural retrofitting is becoming increasingly widespread throughout the world. Externally bonded Fibre Reinforced Polymers (FRPs) are rapidly becoming the technique of choice for structural retrofitting. They are cleaner and easier to apply than conventional retrofitting techniques, reduce disruption to the occupancy and operation of the facility, do not generate debris or waste, and reduce health and accident hazards at the construction site as well as noise and air pollution in the surroundings. fib Bulletin 35 gives state-of-the-art coverage of retrofitting through FRPs and presents relevant provisions from three recent standardisation milestones: EN 1998-3:2005 "Eurocode 8: Design of structures for earthquake resistance - Part 3: Assessment and retrofitting of buildings", the 2005 Draft of the Turkish seismic design code, and the Italian regulatory document CNR-DT 200/04, "Instructions for Design, Execution and Control of Strengthening Interventions by Means of Fibre-Reinforced Composites" (2004).
Author: S. Sánchez-Beitia
Publisher: Computational Mechanics
ISBN:
Category : Architecture
Languages : en
Pages : 704
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Book Description
Comprising the proceedings of the Fifth International Conference on Structural Repair and Maintenance of Historical Buildings held in San Sebastian, Spain in June 1997, the 64 contributions cover a fascinating array of topics divided into the following sections: history and architecture; monitoring and testing; computer simulation; deterioration an.
