Ultra-High Performance Fiber Reinforced Concrete Behavior Under Impact Loading PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Ultra-High Performance Fiber Reinforced Concrete Behavior Under Impact Loading PDF full book. Access full book title Ultra-High Performance Fiber Reinforced Concrete Behavior Under Impact Loading by Mostafa Hassan. Download full books in PDF and EPUB format.
Author: Mostafa Hassan Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 126
Book Description
Increasing the dynamic resistance for the structures is one of the benefits of using ultra high performance concrete (UHPC) and ultra-high performance fiber reinforced concrete (UHP-FRC). This current research focuses on the ultimate compressive and tensile impact strength represented by the dynamic increase factor (DIF), the ratio between the dynamic strength and the quasi-static strength, for UHPC and steel fiber ultrahigh performance concrete (SF-UHPC) using split Hopkinson pressure bar (SHPB). The main goal is to obtain and validate the experimental test results of UHPC and UHP-FRC under high compressive and tensile strain rate range from 22-200 s -1 . Also, Achieving the experimental requirements for the dynamic testing using the SHPB for brittle materials (having stress equilibrium (SE) during the test, constant strain rate (CSR) over an effective time period, and reducing the inertial, friction, and wave dispersion effects). Different steel mono-fiber volume fraction content (0% - 4%) will be used to develop a general equation for the (DIF) for the SF-UHPC with a compressive strength exceeds 200 MPa. The quasi-static and the dynamic compression strength for UHPC and SF-UHPC with different volume fraction was reported. Digital image correlation (DIC) was used to monitor the strains of some samples using a high speed camera at 105,000 - 186,000 frames per second and thus to compliment the calculated strain values that was obtained by the SHPB equations. A three-dimensional finite element analysis has been performed using ABAQUS/Explicit to model multiimpacts on UHPC to check the frictional effect contribution to the DIF and the validity of the constitutive model in representing the behavior of UHPC. Finally, addressing the tensile static and dynamic behavior of UHP-FRC. Static tensile test according to the ASTM requirements is used while modified dynamic tensile setup of split Hopkinson tensile bar (SHTB) is used to determine the dynamic behavior and the dynamic increase factor (DIF) for UHP-FRC under high strain rates ranging from 55.3 - 156.04 s-1.
Author: Mostafa Hassan Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 126
Book Description
Increasing the dynamic resistance for the structures is one of the benefits of using ultra high performance concrete (UHPC) and ultra-high performance fiber reinforced concrete (UHP-FRC). This current research focuses on the ultimate compressive and tensile impact strength represented by the dynamic increase factor (DIF), the ratio between the dynamic strength and the quasi-static strength, for UHPC and steel fiber ultrahigh performance concrete (SF-UHPC) using split Hopkinson pressure bar (SHPB). The main goal is to obtain and validate the experimental test results of UHPC and UHP-FRC under high compressive and tensile strain rate range from 22-200 s -1 . Also, Achieving the experimental requirements for the dynamic testing using the SHPB for brittle materials (having stress equilibrium (SE) during the test, constant strain rate (CSR) over an effective time period, and reducing the inertial, friction, and wave dispersion effects). Different steel mono-fiber volume fraction content (0% - 4%) will be used to develop a general equation for the (DIF) for the SF-UHPC with a compressive strength exceeds 200 MPa. The quasi-static and the dynamic compression strength for UHPC and SF-UHPC with different volume fraction was reported. Digital image correlation (DIC) was used to monitor the strains of some samples using a high speed camera at 105,000 - 186,000 frames per second and thus to compliment the calculated strain values that was obtained by the SHPB equations. A three-dimensional finite element analysis has been performed using ABAQUS/Explicit to model multiimpacts on UHPC to check the frictional effect contribution to the DIF and the validity of the constitutive model in representing the behavior of UHPC. Finally, addressing the tensile static and dynamic behavior of UHP-FRC. Static tensile test according to the ASTM requirements is used while modified dynamic tensile setup of split Hopkinson tensile bar (SHTB) is used to determine the dynamic behavior and the dynamic increase factor (DIF) for UHP-FRC under high strain rates ranging from 55.3 - 156.04 s-1.
Author: Gustavo J. Parra-Montesinos Publisher: Springer Science & Business Media ISBN: 9400724365 Category : Technology & Engineering Languages : en Pages : 567
Book Description
High Performance Fiber Reinforced Cement Composites (HPFRCC) represent a class of cement composites whose stress-strain response in tension undergoes strain hardening behaviour accompanied by multiple cracking, leading to a high strain prior to failure. The primary objective of this International Workshop was to provide a compendium of up-to-date information on the most recent developments and research advances in the field of High Performance Fiber Reinforced Cement Composites. Approximately 65 contributions from leading world experts are assembled in these proceedings and provide an authoritative perspective on the subject. Special topics include fresh and hardening state properties; self-compacting mixtures; mechanical behavior under compressive, tensile, and shear loading; structural applications; impact, earthquake and fire resistance; durability issues; ultra-high performance fiber reinforced concrete; and textile reinforced concrete. Target readers: graduate students, researchers, fiber producers, design engineers, material scientists.
Author: Ivan Marković Publisher: IOS Press ISBN: 9789040726217 Category : Technology & Engineering Languages : en Pages : 232
Book Description
"In the research project presented in this PhD-thesis, an innovative type of fibre concrete is developed, with improved both the tensile strength and the ductility: the Hybrid-Fibre Concrete (HFC). The expression "Hybrid" refers to the "hybridisation" of fibres: short and long steel fibres were combined together in one concrete mixture. This is opposite to conventional steel fibre concretes, which contain only one type of fibre. The basic goal of combining short and long fibres is from one side to improve the tensile strength by the action of short fibres, and from the other side to improve the ductility by the action of long fibres." "In this research project, all important aspects needed for the development and application of Hybrid-Fibre Concrete have been considered. In total 15 mixtures, with different types and amounts of steel fibres were developed and tested in the fresh state (workability) as well as in the hardened state (uniaxial tensile tests, flexural tests, pullout tests of single fibres and compressive tests). A new analytical model for bridging of cracks by fibres was developed and successfully implemented for tensile softening response of HFC. At the end, the utilisation of HFC in the engineering practice was discussed, including a case-study on light prestressed long-span beams made of HFC."--BOOK JACKET.
Author: Ekkehard Fehling Publisher: John Wiley & Sons ISBN: 3433030871 Category : Technology & Engineering Languages : en Pages : 198
Book Description
Selected chapters from the German concrete yearbook are now being published in the new English "Beton-Kalender Series" for the benefit of an international audience. Since it was founded in 1906, the Ernst & Sohn "Beton-Kalender" has been supporting developments in reinforced and prestressed concrete. The aim was to publish a yearbook to reflect progress in "ferro-concrete" structures until - as the book's first editor, Fritz von Emperger (1862-1942), expressed it - the "tempestuous development" in this form of construction came to an end. However, the "Beton-Kalender" quickly became the chosen work of reference for civil and structural engineers, and apart from the years 1945-1950 has been published annually ever since. Ultra high performance concrete (UHPC) is a milestone in concrete technology and application. It permits the construction of both more slender and more durable concrete structures with a prolonged service life and thus improved sustainability. This book is a comprehensive overview of UHPC - from the principles behind its production and its mechanical properties to design and detailing aspects. The focus is on the material behaviour of steel fibre-reinforced UHPC. Numerical modelling and detailing of the connections with reinforced concrete elements are featured as well. Numerous examples worldwide - bridges, columns, facades and roofs - are the basis for additional explanations about the benefits of UHPC and how it helps to realise several architectural requirements. The authors are extensively involved in the testing, design, construction and monitoring of UHPC structures. What they provide here is therefore a unique synopsis of the state of the art with a view to practical applications.
Author: Gustavo J. Parra-Montesinos Publisher: Springer ISBN: 9789400724372 Category : Technology & Engineering Languages : en Pages : 559
Book Description
High Performance Fiber Reinforced Cement Composites (HPFRCC) represent a class of cement composites whose stress-strain response in tension undergoes strain hardening behaviour accompanied by multiple cracking, leading to a high strain prior to failure. The primary objective of this International Workshop was to provide a compendium of up-to-date information on the most recent developments and research advances in the field of High Performance Fiber Reinforced Cement Composites. Approximately 65 contributions from leading world experts are assembled in these proceedings and provide an authoritative perspective on the subject. Special topics include fresh and hardening state properties; self-compacting mixtures; mechanical behavior under compressive, tensile, and shear loading; structural applications; impact, earthquake and fire resistance; durability issues; ultra-high performance fiber reinforced concrete; and textile reinforced concrete. Target readers: graduate students, researchers, fiber producers, design engineers, material scientists.
Author: Harvinder Singh Publisher: Springer ISBN: 981102507X Category : Technology & Engineering Languages : en Pages : 181
Book Description
This book discusses design aspects of steel fiber-reinforced concrete (SFRC) members, including the behavior of the SFRC and its modeling. It also examines the effect of various parameters governing the response of SFRC members in detail. Unlike other publications available in the form of guidelines, which mainly describe design methods based on experimental results, it describes the basic concepts and principles of designing structural members using SFRC as a structural material, predominantly subjected to flexure and shear. Although applications to special structures, such as bridges, retaining walls, tanks and silos are not specifically covered, the fundamental design concepts remain the same and can easily be extended to these elements. It introduces the principles and related theories for predicting the role of steel fibers in reinforcing concrete members concisely and logically, and presents various material models to predict the response of SFRC members in detail. These are then gradually extended to develop an analytical flexural model for the analysis and design of SFRC members. The lack of such a discussion is a major hindrance to the adoption of SFRC as a structural material in routine design practice. This book helps users appraise the role of fiber as reinforcement in concrete members used alone and/or along with conventional rebars. Applications to singly and doubly reinforced beams and slabs are illustrated with examples, using both SFRC and conventional reinforced concrete as a structural material. The influence of the addition of steel fibers on various mechanical properties of the SFRC members is discussed in detail, which is invaluable in helping designers and engineers create optimum designs. Lastly, it describes the generally accepted methods for specifying the steel fibers at the site along with the SFRC mixing methods, storage and transport and explains in detail methods to validate the adopted design. This book is useful to practicing engineers, researchers, and students.
Author: Viktor Mechtcherine Publisher: Springer ISBN: 9402411941 Category : Technology & Engineering Languages : en Pages : 811
Book Description
This is the proceedings of the 4th International Conference on Strain-Hardening Cement-Based Composites (SHCC4), that was held at the Technische Universität Dresden, Germany from 18 to 20 September 2017. The conference focused on advanced fiber-reinforced concrete materials such as strain-hardening cement-based composites (SHCC), textile-reinforced concrete (TRC) and high-performance fiber-reinforced cement-based composites (HPFRCC). All these new materials exhibit pseudo-ductile behavior resulting from the formation of multiple, fine cracks when subject to tensile loading. The use of such types of fiber-reinforced concrete could revolutionize the planning, development, dimensioning, structural and architectural design, construction of new and strengthening and repair of existing buildings and structures in many areas of application. The SHCC4 Conference was the follow-up of three previous successful international events in Stellenbosch, South Africa in 2009, Rio de Janeiro, Brazil in 2011, and Dordrecht, The Netherlands in 2014.
Author: Roya Solhmirzaei Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 287
Book Description
Ultra high performance concrete (UHPC) is an advanced cementitious material made with low water to binder ratio and high fineness admixtures, and possesses a unique combination of superior strength, durability, corrosion resistance, and impact resistance. However, increased strength of UHPC results in a brittle behavior. To overcome this brittle behavior of UHPC and improve post cracking response of UHPC, steel fibers are often added to UHPC and this concrete type is designated as Ultra High Performance Fiber Reinforced Concrete (UHPFRC). Being a relatively new construction material, there are limited guidelines and specifications in standards and codes for the design of structural members fabricated using UHPFRC. To develop a deeper understanding on the behavior of UHPFRC flexural members, seven beams made of UHPFRC are tested under different loading conditions. The test variables include level of longitudinal reinforcement, type of loading (shear and flexure), and presence of shear reinforcement. Further, a finite element based numerical model for tracing structural behavior of UHPFRC beams is developed in ABAQUS. The developed model can account for the nonlinear material response of UHPFRC and steel reinforcement in both tension and compression, as well as bond between concrete and reinforcing steel, and can trace the detailed response of the beams in the entire range of loading. This model is validated by comparing predicted response parameters including load-deflection, load-strain, and crack propagation against experimental data obtained from tests on UHPFRC beams with different material characteristics and under different loading configurations. The validated model is applied to conduct a set of parametric studies to quantify the effect of different parameters on structural response of UHPFRC beams, including the contribution of stirrups and concrete to shear capacity of beams, to explore feasibility of removing the need for shear reinforcement in UHPFRC beams. Results from experiments and numerical model reveal that UHPFRC beams exhibit distinct cracking pattern characterized by the propagation of multiple micro cracks followed by widening of a single crack leading to failure. Also, UHPFRC beams exhibit high flexural and shear capacity, as well as ductility due to high compressive and tensile strength of UHPFRC and fiber bridging developing at the crack surfaces that leads to strain hardening in UHPFRC after cracking. Thus, absence of shear reinforcement in UHPFRC beams does not result in brittle failure, even under dominant shear loading. Data from the conducted experiments as well as those reported in literature is utilized to develop a machine learning (ML) framework for predicting structural response of UHPFRC beams. On this basis, a comprehensive database on reported tests on UHPFRC beams with different geometric, fiber properties, loading and material characteristics is collected. This database is then analyzed utilizing different ML algorithms, including support vector machine, artificial neural networks, k-nearest neighbor, support vector machine regression, and genetic programing, to develop a data-driven computational framework for predicting failure mode and flexural and shear capacity of UHPFRC beams. Predictions obtained from the proposed framework are compared against the values obtained from design equations in codes, and also results from full-scale tests to demonstrate the reliability of the proposed approach. The results clearly indicate that the proposed ML framework can effectively predict failure mode and flexural and shear capacity of UHPFRC beams with varying reinforcement detailing and configurations. The research presented in this dissertation contributes to the development of preliminary guidance on evaluating capacity of UHPFRC beams under different configurations.
Author: Mostafa Hassan
Author: Mostafa Hassan
Author: 
Author: Gustavo J. Parra-Montesinos
Author: Ivan Marković
Author: Ekkehard Fehling
Author: L. B. Freund
Author: Gustavo J. Parra-Montesinos
Author: Harvinder Singh
Author: Viktor Mechtcherine
Author: Roya Solhmirzaei