Download or read book Evaluation of Elastomeric Polymers for Retrofit of Unreinforced Masonry Walls Subjected to Blast written by James D. Connell and published by . This book was released on 2002 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Elastomeric Polymers Used for External Reinforcement of Masonry Walls Subjected to Blast written by Danica Leigh Thornburg and published by . This book was released on 2004 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terrorist attacks have become increasingly common and severe. The weapon of choice Is the easily and cheaply made bomb. Most injuries and deaths occurring in bomb attacks are caused by flying debris due to the fragmentation of walls and windows. Many buildings in use today are comprised of unreinforced masonry walls that cannot withstand the load produced by even small explosive devices. Therefore, a critical need has arisen to strengthen walls In a timely and cost-efficient manner.
Download or read book International Congress on Polymers in Concrete ICPIC 2018 written by Mahmoud M. Reda Taha and published by Springer. This book was released on 2018-04-06 with total page 699 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume collects the proceedings from the International Congress of Polymers in Concrete 2018 (ICPIC), held under the theme “Polymers for Resilient and Sustainable Concrete Infrastructure.” ICPIC 2018 provides an opportunity for researchers and specialists working in the fields of polymers to exchange ideas and follow the latest progress in the use of polymers in concrete infrastructure. It also showcases the use of polymers and polymer concrete in sustainable and resilient development, and provides a platform for local and overseas suppliers, developers, manufacturers and contractors using polymers, polymer concrete and polymer composites in concrete structures to develop new business opportunities and follow the latest developments in the field. The International Congress of Polymers in Concrete is an international forum that has taken place every three years for the last 40 years with the objective of following progress in the field of polymers and their use in concrete and construction. Following 15 successful congresses held in London (1975), Austin (1978), Koriyama (1981), Darmstadt (1984), Brighton (1987), Shanghai (1990), Moscow (1992), Oostende (1995), Bologna (1998), Honolulu (2001), Berlin (2004), Chuncheon (2007), Funchal (2010), Shanghai (2013) and Singapore (2015), the 16th ICPIC will take place in Washington, DC, from April 29 to May 1st, 2018.
Download or read book Advances in Energy Environment and Materials Science written by Yeping Wang and published by CRC Press. This book was released on 2018-11-22 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference on Energy, Environment and Materials Science (EEMS2015) was held in Guangzhou, China, from August 25 - 26, 2015. EEMS2015 provided a platform for academic scientists, researchers and scholars to exchange and share their experiences and research results within the fields of energy science, energy technology, environmental science, environmental engineering, motivation, automation and electrical engineering, material science and engineering, the discovery or development of energy, and environment and materials science.
Download or read book Blast Retrofit of Unreinforced Masonry Walls Using Fabric Reinforced Cementitious Matrix FRCM Composites written by Hyunchul Jung and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unreinforced masonry (URM) walls are commonly found in existing and heritage buildings in Canada, either as infill or load-bearing walls. Such walls are vulnerable to sudden and brittle failure under blast loads due to their insufficient out-of-plane strength. The failure of such walls under blast pressures can also result in fragmentation and wall debris which can injure building occupants. Over the years, researchers have conducted experimental tests to evaluate the structural behaviour of unreinforced masonry walls under out-of-plane loading. Various strengthening methods have been proposed, including the use of concrete overlays, polyurea coatings and advanced fiber-reinforced polymer (FRP) composites. Fabric-reinforced cementitious matrix (FRCM) is an emerging material which can also be used to strengthen and remove the deficiencies in unreinforced masonry walls. This composite material consists of a sequence of one or multiple layers of cement-based mortar reinforced with an open mesh of dry fibers (fabric). This thesis presents an experimental and analytical study which investigates the effectiveness of using FRCM composites to improve the out-of-plane resistance of URM walls when subjected to blast loading. As part of the experimental program, two large-scale URM masonry walls were constructed and strengthened with the 3-plies of unidirectional carbon FRCM retrofit. The specimens included one infill concrete masonry (CMU) wall, and one load-bearing stone wall. The University of Ottawa Shock Tube was used to test the walls under gradually increasing blast pressures until failure, and the results were compared to those of control (un-retrofitted) walls tested in previous research. Overall, the FRCM strengthening method was found to be a promising retrofit technique to increase the blast resistance of unreinforced masonry walls. In particular, the retrofit was effective in increasing the out-of-plane strength, stiffness and ultimate blast capacity of the walls, while delaying brittle failure and reducing fragmentation. As part of the analytical research, Single Degree of Freedom (SDOF) analysis was performed to predict the blast behaviour of the stone load-bearing retrofit wall. This was done by computing wall flexural strength using Plane Section Analysis, and developing an idealized resistance curve for use in the SDOF analysis. Overall, the dynamic analysis results were found to be in reasonable agreement with the experimental maximum displacements.
Download or read book Computational Evaluation of Strengthening the Out of plane Behavior of Masonry Walls Using Fiber Reinforced Polymers written by Jiyoung Lee and published by . This book was released on 2001 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fiber-reinforced polymers (FRP) have recently been used for retrofitting unreinforced masonry (URM) structures which are especially vulnerable to out-of-plane earthquake loads. FRPs have high strength-to-weight ratio, high stiffness-to-weight ratio, high resistance to corrosion, and ease of applicability. Experiments are conducted to test the strength and ductility of FRP-retrofitted brick walls subjected to out-of-plane loading. Based on the material properties and testing set up, nonlinear finite element models were developed to study the effects of different material parameters.
Download or read book Performance of Polyurea Retrofitted Unreinforced Concrete Masonry Walls Under Blast Loading written by Laura Ciornei and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Unreinforced masonry walls subjected to blast loading are vulnerable to collapse and fragmentation. The objective of this thesis is to conduct experimental and analytical research for developing a blast retrofit methodology that utilizes polyurea. A total of four unreinforced masonry walls were constructed and tested under various shock tube induced blast pressures at the University of Ottawa Shock Tube Testing Facility. Two of the retrofitted walls had surface-sprayed polyurea. The results indicate that the use of polyurea effectively controlled fragmentation while significantly increased the load capacity and stiffness of masonry walls. Polyurea proved to be an excellent retrofit material for dissipating blast induced energy by providing ductility to the system and changing the failure mode from brittle to ductile. Single degree of freedom (SDOF) dynamic analyses were conducted as part of the analytical investigation. The results show that the analytical model provides reasonably accurate predictions of the specimen response.
Download or read book Retrofitting of Unreinforced Masonry Walls Using Fiber Reinforced Polymer Laminates written by Reid Robert Senescu and published by . This book was released on 2004 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Experimental and Analytical Evaluation of Masonry Walls Retrofitted with FRP Reinforcement in Out of Plane Bending for Cyclic Loading written by Jeremy Keith Wallace and published by . This book was released on 2004 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: During recent years, near surface mounted (NSM) fiber reinforced polymer (FRP) bars have displayed exceptional results when used to retrofit un-reinforced masonry walls for flexural out-of-plane strengthening. This process involves cutting a shallow groove into the masonry wall, which is less than the thickness of the face shell. FRP bars are then placed into the groove and embedded in an epoxy paste, which transfers stresses from the masonry wall to the reinforcing bar. Although this retrofitting technique is advantageous for most structural applications, the nature of the bar location introduces an inherent restriction. By locating the bar at a depth no greater than the thickness of the face shell, the flexural strength is only increased in one direction. This limitation introduced an opportunity to develop a novel approach to flexural out-of-plane strengthening of masonry walls for cyclic loading, which was the overall objective of this research project. The retrofitting technique is similar to that of NSM rods; but the FRP bars are placed at the centerline of the wall analogous to traditional steel rebars for two directional reinforcing. Test results confirmed that FRP bars can be used to drastically increase flexural capacity of masonry walls subjected to cyclic loading, while remaining practical and beneficial in terms of field construction. Standard working stress equations were also used to conservatively predict the structural responses of the masonry walls within 9 to 15.8 percent.
Download or read book Blast Resistance of Membrane Retrofit Unreinforced Masonry Walls with Flexible Connections written by Eric M. Gagnet and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Retrofitting of Unreinforced Masonry Walls Using Fiber Reinforced Polymer Laminates written by Khalid M. Mosalam and published by . This book was released on 2000 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Compares the structural response of unretrofitted unreinforced masonry (URM) walls with URM walls retrofitted on one side with glass fiber reinforced polymer (FRP) laminates. Six walls were tested using the diagonal tension standard test procedures. In this investigation, 2 objectives are considered. 1) a comparison is made between the improvements in performance provided by retrofitting a single-wythe wall vs. that provided by retrofitting a triple-wythe wall. 2) the performance enhancement provided by the FRP is compared with 2 mortar-to-brick strength ratios.
Download or read book The Dynamics of Explosion and Its Use written by Josef Henrych and published by Elsevier Science & Technology. This book was released on 1979 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Structural Engineering written by Vasant Matsagar and published by Springer. This book was released on 2014-12-12 with total page 1033 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents research papers presented by academicians, researchers, and practicing structural engineers from India and abroad in the recently held Structural Engineering Convention (SEC) 2014 at Indian Institute of Technology Delhi during 22 – 24 December 2014. The book is divided into three volumes and encompasses multidisciplinary areas within structural engineering, such as earthquake engineering and structural dynamics, structural mechanics, finite element methods, structural vibration control, advanced cementitious and composite materials, bridge engineering, and soil-structure interaction. Advances in Structural Engineering is a useful reference material for structural engineering fraternity including undergraduate and postgraduate students, academicians, researchers and practicing engineers.
Download or read book Blast Protection of Buildings written by American Society of Civil Engineers and published by . This book was released on 2023-03-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Standard ASCE/SEI 59-22 provides minimum requirements for planning, design, construction, and assessment of new and existing buildings subject to the effects of accidental or malicious explosions.
Download or read book Twentieth Century Building Materials written by Thomas C. Jester and published by Getty Publications. This book was released on 2014-08-01 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the concluding decades of the twentieth century, the historic preservation community increasingly turned its attention to modern buildings, including bungalows from the 1930s, gas stations and diners from the 1940s, and office buildings and architectural homes from the 1950s. Conservation efforts, however, were often hampered by a lack of technical information about the products used in these structures, and to fill this gap Twentieth-Century Building Materials was developed by the U.S. Department of the Interior’s National Park Service and first published in 1995. Now, this invaluable guide is being reissued—with a new preface by the book’s original editor. With more than 250 illustrations, including a full-color photographic essay, the volume remains an indispensable reference on the history and conservation of modern building materials. Thirty-seven essays written by leading experts offer insights into the history, manufacturing processes, and uses of a wide range of materials, including glass block, aluminum, plywood, linoleum, and gypsum board. Readers will also learn about how these materials perform over time and discover valuable conservation and repair techniques. Bibliographies and sources for further research complete the volume. The book is intended for a wide range of conservation professionals including architects, engineers, conservators, and material scientists engaged in the conservation of modern buildings, as well as scholars in related disciplines.
Download or read book Fastenings for Seismic Retrofitting written by Comité euro-international du béton and published by Thomas Telford. This book was released on 1997 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The economic consequences and loss of life make earthquake disasters catastrophic anywhere in the world. Seismic retrofitting, or repair, of buildings is an essential component for mitigating the effects of earthquakes. This state-of-the-art report reviews and introduces the latest design concepts and methods for seismic retrofitting throughout the world, with emphasis on the use of fastening systems.
