Download or read book Structural Characterization of Hybrid Fiber Reinforced Polymer FRP autoclaved Aerated Concrete AAC Panels written by Amol Khotpal and published by . This book was released on 2004 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developments in fiber reinforced polymer FRP composites for civil engineering written by N. Uddin and published by Elsevier Inc. Chapters. This book was released on 2013-05-15 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The low velocity impact response of plain autoclaved aerated concrete (AAC) and FRP/AAC sandwich panels has been investigated. The structural sandwich panels composed of a FRP/AAC combination have shown excellent characteristics in terms of high strength and high stiffness-to-weight ratios. In addition to having adequate flexural and shear properties, the behavior of FRP/AAC sandwich panels needs to be investigated when subjected to impact loading. During service, the structural members in the building structures are subjected to impact loading that varies from object-caused impact, blast due to explosions, to high velocity impact of debris during tornados, hurricanes, or storms. Low velocity impact (LVI) testing serves as a means to quantify the allowable impact energy that the structure is able to withstand and to assess the typical failure modes encountered during this type of loading. The objectives of this chapter are: to study the response of plain AAC and CFRP/AAC sandwich structures to low velocity impact and to assess the damage performance of the panels; to study the effect of FRP laminates on the impact response of CFRP/AAC panels; to study the effect of the processing method (hand layup versus VARTM) and panel stiffness on the impact response of the hybrid panels. Impact testing was conducted using an Instron drop-tower testing machine. Experimental results showed a significant influence of CFRPs laminates on the energy absorbed and peak load of the CFRP/AAC panels. Further, a theoretical analysis was conducted to predict the energy absorbed by the CFRP/AAC sandwich panel using the energy balance model, and the results found were in good accordance with the experimental ones.
Download or read book Developments in fiber reinforced polymer FRP composites for civil engineering written by N. Uddin and published by Elsevier Inc. Chapters. This book was released on 2013-05-15 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter discusses design for fiber-reinforced polymer (FRP)/autoclaved aerated concrete (AAC) sandwich panels for structural applications. The chapter first presents the finite element analysis (FE) of FRP/AAC panels. The FE results are compared with the experimental results showing acceptable agreement. Next, analytical models are presented to predict the deflection and strength of the panels. Finally, design graphs have been developed to help in designing the floor and wall panels made from FRP/AAC panels. Also, those panels have been compared to the commercially used reinforced AAC panels demonstrating that FRP/AAC panels offer a relatively cost-effective solution for longer life cycle.
Download or read book Developments in Fiber Reinforced Polymer FRP Composites for Civil Engineering written by Nasim Uddin and published by Elsevier. This book was released on 2013-05-15 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of fiber-reinforced polymer (FRP) composite materials has had a dramatic impact on civil engineering techniques over the past three decades. FRPs are an ideal material for structural applications where high strength-to-weight and stiffness-to-weight ratios are required. Developments in fiber-reinforced polymer (FRP) composites for civil engineering outlines the latest developments in fiber-reinforced polymer (FRP) composites and their applications in civil engineering. Part one outlines the general developments of fiber-reinforced polymer (FRP) use, reviewing recent advancements in the design and processing techniques of composite materials. Part two outlines particular types of fiber-reinforced polymers and covers their use in a wide range of civil engineering and structural applications, including their use in disaster-resistant buildings, strengthening steel structures and bridge superstructures. With its distinguished editor and international team of contributors, Developments in fiber-reinforced polymer (FRP) composites for civil engineering is an essential text for researchers and engineers in the field of civil engineering and industries such as bridge and building construction. Outlines the latest developments in fiber-reinforced polymer composites and their applications in civil engineering Reviews recent advancements in the design and processing techniques of composite materials Covers the use of particular types of fiber-reinforced polymers in a wide range of civil engineering and structural applications
Download or read book Manufacturing and Design Methodology of Hybrid Fiber Reinforced Polymer FRP autoclaved Aerated Concrete ACC Panels and Its Response Under Low Velocity Impact written by Kedar Vishwanath Shelar and published by . This book was released on 2006 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Textile Reinforced Concrete written by Alva Peled and published by CRC Press. This book was released on 2017-08-07 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: Textile reinforced concrete (TRC) has emerged in recent years as an attractive new high performance cement-based composite. Textiles can significantly improve the mechanical behavior of cement matrices under static and dynamic conditions, and give superior tensile strength, toughness, ductility, energy absorption and protection against environmental degrading influences. Flexibility with fabric production methods enables the control of fabric and yarn geometry. This, along with the ability to incorporate into the fabric a range of yarns of different types and performances, as well as cement matrix modifications, enables design of the composite to a wide range of needs. The book is intended to provide a comprehensive treatment of TRC, covering the basic fundamentals of the composite material itself and the principles governing its performance on a macro-scale as a component in a structure. It provides in-depth treatment of the fabric, methods for production of the composite, the micro-mechanics with special attention to the role of bonding and microstructure, behavior under static and dynamic loading, sustainability, design, and the applications of TRC composites.
Download or read book Developments in fiber reinforced polymer FRP composites for civil engineering written by N. Uddin and published by Elsevier Inc. Chapters. This book was released on 2013-05-15 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: The primary objective of this chapter is first to introduce and demonstrate the application of thermoplastic (woven glass reinforced polypropylene) in the design of modular fiber-reinforced bridge decks, and next the development of jackets for confining concrete columns against compression and impact loading. The design concept and manufacturing processes of the thermoplastic bridge deck composite structural system are presented by recognizing the structural demands required to support highway traffic. Then the results of the small-scale static cylinder tests and the impact tests of concrete columns are presented, demonstrating that thermoplastic reinforcement jackets act to restrain the lateral expansion of the concrete that accompanies the onset of crushing, maintaining the integrity of the core concrete, and enabling much higher compression strains (compared to CFRP composite wraps) to be sustained by the compression zone before failure occurs.
Download or read book Characterization of Design Parameters for Fiber Reinforced Polymer Composite Reinforced Concrete Systems written by Francisco Aguiñiga Gaona and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion of steel reinforcement in concrete structures results in significant repair and rehabilitation costs. In the past several years, new fiber reinforced polymer (FRP) reinforcing bars have been introduced as an alternative to steel reinforcing bars. Several national and international organizations have recently developed standards based on preliminary test results. However, limited validation testing has been performed on the recommendations of these standards. High variability of the tensile properties, degradation of tensile strength, direct shear capacity, predicted deflections due to creep, cracking behavior of FRP-reinforced concrete flexural members, bond behavior and development length, and effects of thermal expansion on cracking of FRP reinforced concrete have all been reported, but are areas that need further investigation and validation. The objective of this study is to evaluate the characteristics of glass FRP reinforcing bars and provide recommendations on the design and construction of concrete structures containing these bar types with regard to the areas described. The recently developed ACI 440 design guidelines were analyzed and modifications proposed.
Download or read book Report on Fiber Reinforced Polymer FRP Reinforcement for Concrete Structures written by ACI Committee 440 and published by . This book was released on 2007 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization and Modeling of Structural and Self monitoring Behavior of Fiber Reinforced Polymer Concrete written by Kallol Sett and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modified Composite Application to Improve Strength and Ductility of Structural Components written by Umesh Shahu Shrestha and published by . This book was released on 2014 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present numerical study investigates the application of carbon fiber reinforced polymer (CFRP) composite sheets to improve strength and to explore the potential ductility enhancement of concrete and masonry structural components. Consequently, composite sheets used varied from normal to hybrid carbon fiber reinforced polymers and their applications were modified from completely to sequentially bonded sheets. Sudden debonding of fiber reinforced polymer (FRP) sheets from concrete members is one major concern. The present research investigates the bond stress distribution in CFRP-concrete interface during debonding failure and proposes an effective sequentially bonding CFRP sheets layout to improve load carrying capacity along with ductility. Previous studies revealed that the application of FRP sheets in strengthening reinforced concrete (RC) beams has improved their load carrying capacity but not the ductility. In this study, strengthening of reinforced concrete (RC) beams with hybrid CFRP sheets was proposed to enhance the load carrying capacity and change the brittle mode to ductile failure. Additionally, unreinforced masonry shear walls with openings were retrofitted with CFRP sheets to restore the loss in stiffness and flexural strength due to openings. To perform these investigations, complex three-dimensional nonlinear finite element analysis (FEA) models of structural elements such as concrete blocks, RC beams and unreinforced masonry shear walls strengthened with CFRP sheets were developed. Finite element results of proposed models are as follows: 1. The FEA model of CFRP-concrete block double shear test was able to provide a complete set of stress and strain distributions along the bond length which was not possible to obtain experimentally. FEA simulation was able to reveal the distribution of strain amplitude, providing guidance for accurate placement of strain gauges at critical locations during experiment. 2. FEA model of CFRP-concrete single bond test with sequential bonding was able to provide the changes in bond stress distribution compared to fully-bonded CFRP-concrete single bond test model. Some of the sequentially bonded FRP-concrete block models gained ductility along with load carrying capacity. 3. Through the retrofit of RC beam with hybrid instead of normal CFRP sheets the mode of failure changed from brittle flexural-shear debonding to ductile gradual rupture of hybrid CFRP sheets. 4. Masonry shear wall with vertical rectangular opening outperformed the masonry shear walls with square, circular and horizontal rectangular openings in terms of stiffness and lateral in-plane load carrying capacity. Masonry shear walls with multiple openings outperformed the single opening in terms of stiffness and lateral in-plane load carrying capacity. Regardless of the opening shapes, the proposed CFRP sheets layout around the opening of masonry shear walls was effective in improving their stiffness and strength.
Download or read book Characterization of Thermal and Electrical Properties of Fiber Reinforced Polymer FRP Composites written by Raja Ram Tipirneni and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structures 2009 written by and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "These 15 papers discuss various aspects of the following structures: light support structures for traffic signs and signals; steel bridges; concrete bridges; and culverts. Among the specific topics discussed for these structures are their design, testing, seismic design, and properties of materials used in these structures, including concrete, steel, polyvinyl chloride pipe joints, carbon fiber-reinforced polymer, glass fiber-reinforced polymer stay-in-place forms, and the fiber-reinforced polymer-concrete bond."--Pub. desc
Download or read book Quasibrittle Fracture Mechanics and Size Effect written by Jia-Liang Le and published by Oxford University Press. This book was released on 2021-11-19 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many modern engineering structures are composed of brittle heterogenous, or quasibrittle, materials. These include concrete, composites, tough ceramics, rocks, cold asphalt mixtures, and many brittle materials at the microscale. Understanding the failure behavior of these materials is of paramount importance for improving the resilience and sustainability of various engineering structures including civil infrastructure, aircraft, ships, military armors, and microelectronic devices. Designed for graduate and upper-level undergraduate university courses, this textbook provides a comprehensive treatment of quasibrittle fracture mechanics. It includes a concise but rigorous examination of linear elastic fracture mechanics, which is the foundation of all fracture mechanics. It also covers the fundamental concepts of nonlinear fracture mechanics, and introduces more advanced concepts such as triaxial stress state in the fracture process zone, nonlocal continuum models, and discrete computational models. Finally, the book features extensive discussion of the various practical applications of quasibrittle fracture mechanics across different structures and engineering disciplines, and throughout includes exercises and problems for students to test their understanding.
Download or read book Lightweight Sandwich Construction written by J. M. Davies and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sandwich panels are being used increasingly as the cladding of buildings like factories, warehouses, cold stores and retail sheds. This is because they are light in weight, thermally efficient, aesthetically attractive and can be easily handled and erected. However, to date, an authoritative book on the subject was lacking. This new reference work aims to fill that gap. The designer, specifier and manufacturer of sandwich panels all require a great deal of information on a wide range of subjects. This book was written by a group of European experts under the editorship of a UK specialist in lightweight construction. It provides guidance on: * materials used in manufacture * thermal efficiency and air- and water-tightness * acoustic performance * performance in fire * durability * special problems of sandwich panels in cold stores and chill rooms * architectural and aesthetic considerations * structural design at the ultimate and serviceability limit states * additional structural considerations including fastenings, the effect of openings and the use of sandwich panels as load-bearing walls * test procedures The book concludes with some numerical design examples and is highly illustrated throughout.
Download or read book Ultra High Performance Concrete written by Ekkehard Fehling and published by kassel university press GmbH. This book was released on 2008-01-01 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fibre Reinforced Cementitious Composites Second Edition written by Arnon Bentur and published by CRC Press. This book was released on 2006-11-22 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced cementitious composites can be designed to have outstanding combinations of strength (five to ten times that of conventional concrete) and energy absorption capacity (up to 1000 times that of plain concrete). This second edition brings together in one volume the latest research developments in this rapidly expanding area. The book is split into two parts. The first part is concerned with the mechanics of fibre reinforced brittle matrices and the implications for cementitious systems. In the second part the authors describe the various types of fibre-cement composites, discussing production processes, mechanical and physical properties, durability and applications. Two new chapters have been added, covering fibre specification and structural applications. Fibre Reinforced Cementitious Composites will be of great interest to practitioners involved in modern concrete technology and will also be of use to academics, researchers and graduate students.
