Conecte-se

Bibliografias temáticas / Blast retrofit

Literatura científica selecionada sobre o tema "Blast retrofit"

Autor: Grafiati

Publicado: 23 de junho de 2021

Última modificação: 16 de fevereiro de 2022

Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos

Selecione um tipo de fonte:

Consulte a lista de atuais artigos, livros, teses, anais de congressos e outras fontes científicas relevantes para o tema "Blast retrofit".

Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.

Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.

Índice

Artigos de revistas
Teses / dissertações
Capítulos de livros
Trabalhos de conferências
Relatórios de organizações

Artigos de revistas sobre o assunto "Blast retrofit":

1

Figuli, Lucia, e Daniela Štaffenova. "Practical Aspect of Methods Used for Blast Protection". Key Engineering Materials 755 (setembro de 2017): 139–46. http://dx.doi.org/10.4028/www.scientific.net/kem.755.139.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

2

King, Kim W., Johnny H. Wawclawczyk e Cem Ozbey. "Retrofit strategies to protect structures from blast loadingThis article is one of a selection of papers published in the Special Issue on Blast Engineering." Canadian Journal of Civil Engineering 36, n.º 8 (agosto de 2009): 1345–55. http://dx.doi.org/10.1139/l08-058.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Structural retrofits to buildings can be implemented to increase the protection level to occupants from potential terrorist bombing attacks. Retrofit strategies discussed in this paper can be categorized into three groups: (i) strengthening concepts, (ii) shielding concepts, and (iii) concepts to control hazardous debris. Strengthening concepts such as span reduction and increasing member sections are considered in this paper for three common construction systems including steel, concrete, and masonry. Shielding concepts are intended to prevent structural members from being fully loaded by blast forces and range from local area applications to entire building coverage. Examples of shielding concepts include a new section of wall that shields a vulnerable portion of the building or a new structure built over an entire building. Examples of concepts to control hazardous debris include arresting or deflecting failed cladding away from critical areas with “catch systems” or internal shield systems. This paper is intended to discuss typical building retrofit strategies for primary structural members (load bearing) and secondary structural members (nonload bearing) through strengthening, shielding, or controlling hazardous debris.

3

Iqbal, N., M. Tripathi, S. Parthasarathy, D. Kumar e P. K. Roy. "Polyurea coatings for enhanced blast-mitigation: a review". RSC Advances 6, n.º 111 (2016): 109706–17. http://dx.doi.org/10.1039/c6ra23866a.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

4

Lin, Lorraine H., Eve Hinman, Hollice F. Stone e Allison M. Roberts. "Survey of Window Retrofit Solutions for Blast Mitigation". Journal of Performance of Constructed Facilities 18, n.º 2 (maio de 2004): 86–94. http://dx.doi.org/10.1061/(asce)0887-3828(2004)18:2(86).

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

5

Mendonça, Fausto Batista, Girum Solomon Urgessa, Rita Lazzarini Dutra, Rene Francisco Boschi Gonçalves, Koshun Iha e José Atílio Fritz Fidel Rocco. "EPS foam blast attenuation in full-scale field test of reinforced concrete slabs". Acta Scientiarum. Technology 42 (3 de outubro de 2019): e40020. http://dx.doi.org/10.4025/actascitechnol.v42i1.40020.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Predicting explosion parameters is an important step when planning for blast tests or the design of blast resistant buildings. This paper presents a comparison of recorded pressure that was reflected on the surface of reinforced concrete slabs with and without EPS (Expanded Polystyrene) foam retrofit measured from a detonation of 2.7 kg of non-confined plastic explosive. Two 50 MPa reinforced concrete slabs measuring 1.0x1.0x0.08 m, simply supported on two sides were tested. The explosive was suspended at a distance of 2.0 m from the upper surface of the slabs; one of the slabs had 5.0 cm thick foam on the top side. Eight piezoelectric pressure sensors were positioned at a distance of 2.0 m from the explosive. Results showed that the foam retrofit reduced the reflected pressure by approximately 57% when compared to the slab without EPS foam retrofit.

6

Hadden, David, Roger Cleave e Kai Fischer. "BlastWall: An Integrated Wall and Window Retrofit System". Applied Mechanics and Materials 82 (julho de 2011): 473–78. http://dx.doi.org/10.4028/www.scientific.net/amm.82.473.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Exterior wall infill panels of non-loadbearing masonry, often with window openings, are commonly used in buildings around the world. While the structural frame may possess a good level of resistance to explosion loading the masonry wall panels are often relatively weak and liable to sudden, brittle failure when subjected to blast loads with the result that hazardous debris is thrown into the interior of the building. Blast resistant windows can be set into openings in the masonry wall panels; however failure of the wall may occur at a lower load than that against which the window would survive if it was adequately supported. The BlastWall research project was carried out by a consortium of industry partners and research institutions with the aim of developing a practical integrated wall and window retrofit system to mitigate the hazards to building occupants and critical equipment from the failure of masonry wall infill panels under external blast loading. Utilising elements of Tecdur® technology, the BlastWall system proved successful under loading at EXV15, with since-proven potential for even higher performance. The system is supported by a software tool that allows its components to be tailored to suit a wide range of existing materials, dimensions and loading conditions. This paper describes the project objectives, the BlastWall system and its components, including the software tool, and the trials carried during system development resulting in overall proof of concept.

7

Winget, David, Eric Williamson, Kirk Marchand e Joseph Gannon. "Recommendations for Blast Design and Retrofit of Typical Highway Bridges". Transportation Research Record: Journal of the Transportation Research Board 11s (janeiro de 2005): 1–8. http://dx.doi.org/10.3141/trr.11s.464361685g144j74.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

8

Mostafa, A., A. Salem, M. Wahab e S. Mazek. "Blast Mitigation using Polyurethane Foam to Retrofit Fortified Sandwich Structures". International Conference on Civil and Architecture Engineering 8, n.º 8 (1 de maio de 2010): 1–17. http://dx.doi.org/10.21608/iccae.2010.44409.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

9

Lukić, Sanja, e Hrvoje Draganić. "Blast Loaded Columns—State of the Art Review". Applied Sciences 11, n.º 17 (28 de agosto de 2021): 7980. http://dx.doi.org/10.3390/app11177980.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

The ever-present threat of terrorist attacks in recent decades gives way to research towards blast-resistant design of structures. Columns, as one of the main load-bearing elements in residential buildings and bridges, are becoming interesting targets in bombing attacks. Research of column blast load behavior leads toward increased safety by identifying shortcomings and problems of those elements and acting accordingly. Field tests and numerical simulations lead to the development of new blast load mitigation technics, either in the design process or as a retrofit and strengthening of existing elements. The article provides a state-of-the-art literature review of filed blast load tests and numerical simulations of a bridge and building columns.

10

Gagnet, Eric M., John M. Hoemann e James S. Davidson. "Blast resistance of membrane retrofit unreinforced masonry walls with flexible connections". International Journal of Protective Structures 8, n.º 4 (15 de setembro de 2017): 539–59. http://dx.doi.org/10.1177/2041419617729897.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Mais fontes

Teses / dissertações sobre o assunto "Blast retrofit":

1

Lloyd, Alan Eric Walker. "Blast Retrofit of Reinforced Concrete Columns". Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/32389.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Explosives place large demands on the lateral load carrying capacity of structures. If these loads are applied on columns, the high pressure transient loads from explosives can result in significant damage to the primary gravity load carrying elements. The loss of these elements, which are responsible from overall strength and stability of the structure, may cause collapse of all or parts of the structure. Therefore, it is important to mitigate the blast loads effects on columns. A comprehensive research study into the design, application, and use of different retrofit systems to mitigate damage to columns under blast loads has been undertaken. This research program, consisting of experimental testing and analytical investigation, sought out retrofits that address the strength of columns as well as those that enhance ductility are explored. Different materials and resistance mechanisms are used to increase column capacity. An experimental testing program was conducted using a shock tube to test the capacity of columns under blast loads. For this program, a total of sixteen reinforced concrete columns were constructed and the data from a further two columns from a previous study was compiled. Of these columns, a total of thirteen were retrofitted to mitigate the effects of blast. Carbon fibre reinforced polymer (CFRP) was applied to eight of the columns in the form of jacketing, longitudinal reinforcement, or the combination of the two. The other retrofits included steel prestressed confinement applied to one column, steel bracing acting as compression members applied to one column, and steel bracing acting as tension members applied to three columns. The columns were tested under incrementally increasing shock tube induced shock wave loading up to failure of the specimen or capacity of the shock tube. The performance of the retrofitted columns was compared with the control columns and against other retrofits. Quantitative comparisons of displacements and strains were made along with qualitative assessments of damage. The results indicated that all the retrofits increased capacity to the column, however, certain retrofits out performed others. The best FRP retrofit technique was found to be the combination of longitudinal and transverse FRP. The prestressed steel jacketing proved to be effective at increasing ductility capacity of the column. The compression brace retrofit was found to be effective in significantly increasing capacity of the column. The tension brace retrofits had the best performance over all the retrofits including the compression brace retrofit. The experimental data was used to validate analysis techniques to model the behaviour of the specimens. This technique reduced the columns to an equivalent single-degree-of-freedom (SDOF) system for dynamic analysis purposes. The reduction to the SDOF system was achieved by computing a resistance to lateral load and lateral displacement relationship. Each retrofit was carefully considered in this analysis including the retrofit’s possible effect on material and sectional properties as well as any force resistance mechanism that the retrofit introduces. The results of the modeling and experimental program were used to develop retrofit design guidelines. These guidelines are presented in detail in this thesis.

2

Jacques, Eric. "Blast Retrofit of Reinforced Concrete Walls and Slabs". Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/19802.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Mitigation of the blast risk associated with terrorist attacks and accidental explosions threatening critical infrastructure has become a topic of great interest in the civil engineering community, both in Canada and abroad. One method of mitigating blast risk is to retrofit vulnerable structures to resist the impulsive effects of blast loading. A comprehensive re-search program has been undertaken to develop fibre reinforced polymer (FRP) retrofit methodologies for structural and non-structural elements, specifically reinforced concrete slabs and walls, subjected to blast loading. The results of this investigation are equally valid for flexure dominant reinforced concrete beams subject to blast effects. The objective of the research program was to generate a large volume of research data for the development of blast-resistant design guidelines for externally bonded FRP retrofit systems. A combined experimental and analytical investigation was performed to achieve the objectives of the program. The experimental program involved the construction and simulated blast testing of a total of thirteen reinforced concrete wall and slab specimens divided into five companion sets. These specimens were subjected to a total of sixty simulated explosions generated at the University of Ottawa Shock Tube Testing Facility. Companion sets were designed to study one- and two-way bending, as well as the performance of specimens with simply-supported and fully-fixed boundary conditions. The majority of the specimens were retrofitted with externally bonded carbon fibre reinforced polymer (CFRP) sheets to improve overall load-deformation characteristics. Specimens within each companion set were subjected to progressively increasing pressure-impulse combinations to study component behaviour from elastic response up to inelastic component failure. The blast performance of companion as-built and retrofitted specimens was quantified in terms of measured load-deformation characteristics, and observed member behaviour throughout all stages of response. The results show that externally bonded FRP retrofits are an effective retrofit technique to improve the blast resistance of reinforced concrete structures, provided that debonding of the composite from the concrete substrate is prevented. The test results also indicate that FRP retrofitted reinforced concrete structures may survive initial inbound displacements, only to failure by moment reversals during the negative displacement phase. The experimental test data was used to verify analytical techniques to model the behaviour of reinforced concrete walls and slabs subjected to blast loading. The force-deformation characteristics of one-way wall strips were established using inelastic sectional and member analyses. The force-deformation characteristics of two-way slab plates were established using commonly accepted design approximations. The response of all specimens was computed by explicit solution of the single degree of freedom dynamic equation of motion. An equivalent static force procedure was used to analyze the response of CFRP retrofitted specimens which remained elastic after testing. The predicted maximum displacements and time-to-maximum displacements were compared against experimental results. The analysis indicates that the modelling procedures accurately describe the response characteristics of both retrofitted and unretrofitted specimens observed during the experiment.

3

Fitzmaurice, Silas James. "Blast retrofit design of CMU walls using polymer sheets". Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4569.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Thesis (M.S.)--University of Missouri-Columbia, 2006.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on April 17, 2009) Includes bibliographical references.

4

Gandia, Jordan. "Blast Retrofit of Unreinforced Masonry Walls Using ECC Shotcrete". Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39070.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Blast loads on buildings can originate from accidental explosions or from targeted attacks. Design against blast loads has become an increasingly important topic due to the current political climate. Unfortunately, many older buildings are constructed with unreinforced masonry (URM) walls which are particularly susceptible to out of plane failures caused by blast loads. One solution to increase the safety of these buildings is to retrofit them with advanced materials that can increase their out-of-plane stiffness and resistance. This thesis investigates the potential of using a high-performance shotcrete as a retrofit system for URM walls against blast effects. The shotcrete used in this study is made from Engineered Cementitious Composite (ECC), a special type of fiber-reinforced cementitious material, with high ductility and high energy-absorption capacity. The ECC shotcrete replaces aggregates with synthetic microfibers to increase tensile strength and ductility. A welded wire mesh was embedded in the shotcrete to provide ductile behavior. The testing program includes a total of six large-scale unreinforced masonry wall specimens. Two walls were constructed using concrete masonry unit (CMU) blocks to be retrofitted. The first specimen was built as an infill wall, experiencing no axial load, while the second specimen was built as a load bearing wall, with 10% axial load. Four more walls were built out of stone blocks. Two of the stone walls were controls: one infill and one load bearing (4% axial load). The other two stone walls were retrofit with the shotcrete system: one infill and one load bearing (4% axial load). The blast loads were simulated using the University of Ottawa’s Shock Tube. The walls were restrained at the top and bottom with a shear restraint to induce one way bending. Pressure, displacement and strain data were acquired with the use of pressure gauges, LVDT’s, strain gauges and cameras. The specimens were subjected to gradually increasing blast pressures until failure. The performance of the specimens was observed by analyzing the displacement, crack widths, fragmentation and failure mode. The results indicate the benefits of using ECC shotcrete as a retrofit system. The displacements of the retrofit walls were very small compared to the control walls, and fragments were limited. The specimens with axial load were found to have increased resistance. While the failure mode was brittle for the retrofit walls, this can be avoided with the use of a mesh with a larger area of steel. A SDOF analysis was performed to predict the blast response of the test walls. The analysis was done by generating resistance functions for the walls through analytical models. The analysis was found to agree reasonably well with the experimental data.

5

Kennedy, John Anthony. "Analytical and experimental evaluation of steel sheets for blast retrofit design". Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/5849.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Thesis (M.S.)--University of Missouri-Columbia, 2005.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (January 24, 2007) Includes bibliographical references.

6

Jung, Hyunchul. "Blast Retrofit of Unreinforced Masonry Walls Using Fabric Reinforced Cementitious Matrix (FRCM) Composites". Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40530.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

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.

7

Chavan, Harshal. "Experimental and Analytical Investigation of Steel Hardened Curtain Wall Mullions". Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/42311.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Glass facade/curtain wall assemblies are commonly used in modern building construction as part of building envelop. This system has a number of advantages, including pleasant architectural appearance, building energy optimization, acceptable fire resistance and low maintenance. However, they pose tremendous risk towards maliciously intended acts of terror in the form of bomb blasts. The literature review conducted revealed lack of previous research on mullion strengthening/hardening. The present study has the objective of developing hardening techniques for curtain wall mullions to withstand high-intensity impulsive blast loads. Combined experimental and analytical research was conducted for the development of mullion retrofit techniques using the Shock Tube Facility of the University of Ottawa. The test program involved retrofitting existing, commercially used aluminum mullions with steel plates and subjecting them to different levels of blast loads. The mullions were retrofitted with three techniques with the help of steel L shaped angles, steel plates and with a combination of steel HSS sections and plates. The results indicated an increase of load carrying capacity of the mullions up to a factor of 2.2 with up to 30% reduction in mid-height displacements. It was shown that the steel hardening components developed full composite action with the existing aluminum section, indicating the effectiveness of the hardening technology. The analytical research followed the experimental research with the main objective of validating experimental results, as well as validating the assumption of full composite action between the core aluminum mullion and the hardening plates. The first step was to develop resistance functions followed by the validation of main analytical tool RC-Blast and the UFC charted solution. Following excellent agreement between these two analytical tools, RC-Blast was further validated against the experimental results. In addition, Pressure-impulse (P-I) diagrams were developed as design aids for different pressure-impulse combinations. The retrofit techniques developed were applied to a selected prototype building to assess their feasibility for use in practice. Two different blast threats were considered for this application. Conclusions were drawn regarding the effectiveness of the curtain wall hardening techniques for use in practice.

8

Abbott, Galvão Sobreira Lopes Isabel. "The design and retrofit of buildings for resistance to blast-induced progressive collapse". Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/50625.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2009.
Includes bibliographical references (leaf 44).
In recent years, concern has risen drastically regarding the suitability of structural design for blast resistance. Historic events have proven that buildings that are designed in compliance with conventional building codes are not necessarily able to resist extreme loads, particularly blast loads. While significant progress has been made towards the development of design guidelines for federal buildings according to threat level, comprehensive codes have not yet been devised for blast hardening of non-federal buildings. One of the most important considerations in the strength-based design of buildings is adequate protection against progressive collapse in any unforeseen event. In the past, this has been achieved to a limited extent through exterior barriers, which help thwart efforts to directly impact the building, and thus minimize damage. With the emergence of structural design for blast resistance, methodologies to inhibit progressive collapse can expand to not only comprise exterior components, but also the structural components themselves. This thesis outlines potential structural and architectural techniques to design and retrofit buildings for resistance to blast impact loads as well as progressive collapse. These considerations are then applied to the study of two well-known blast events, the 1995 bombing of the Alfred P. Murrah Building in Oklahoma, and the 2001 attack on the Pentagon. A comparison of the two cases reveals that the redundant and ductile design of the Pentagon provided considerable resistance to impact loads, and contributed greatly to impeding the onset of progressive collapse.
(cont.) Several blast-resistant features found in the Pentagon were not present in the design of the Murrah Building, thereby increasing the vulnerability of the structure to damage and collapse. The development of design codes and guidelines for blast resistance presents a number of challenges. These challenges generally arise from the erratic nature of blast loads and the difficulty in standardizing design procedures for variable levels of threat. While it may be difficult to implement general guidelines and codes for blast resistance, existing knowledge of blast hardening techniques can be applied to the design of buildings on a risk-based, case-by-case basis.
by Isabel Abbott Galvão Sobreira Lopes.
M.Eng.

9

Hrynyk, Trevor D. "Static evaluation of the out-of-plane behavior of URM infill walls utilizing modern blast retrofit systems". Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/Hrynyk_09007dcc803bc4ce.pdf.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

Thesis (M.S.)--University of Missouri--Rolla, 2007.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed December 4, 2007) Includes bibliographical references (p. 184-186).

10

Ciornei, Laura. "Performance of Polyurea Retrofitted Unreinforced Concrete Masonry Walls Under Blast Loading". Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23180.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

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.

Capítulos de livros sobre o assunto "Blast retrofit":

1

"Masonry Retrofit Design Example". In Design of Blast-Resistant Buildings in Petrochemical Facilities, 263–75. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/9780784410882.ch13.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

2

Mendonça, Fausto B., e Girum S. Urgessa. "Pre-Test and Analysis of a Reinforced Concrete Slab Subjected to Blast From a Non-Confined Explosive". In Energetic Materials Research, Applications, and New Technologies, 272–87. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-2903-3.ch013.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Resumo:

A large scale experimental program consisting of testing 10 RC slabs with different variations of concrete compressive strength, reinforcement ratio and retrofit was conducted in Brazil. As part of that test program, a small-scale blast pre-test setup and associated dynamic analysis were conducted in order to confirm the proper functioning of the blast test sensors (pressure gages, displacement meter and accelerometers). The results of the pre-test were compared with theoretical blast wave parameter predictions using established equations and maximum displacement predictions using simplified dynamic analysis. The pre-test experiment provided useful insights and was shown to be critical for the success of the subsequent large scale blast tests.

Trabalhos de conferências sobre o assunto "Blast retrofit":

1

Wesevich, J. W., e E. M. Gasulla. "Blast Hardened Retrofit Details for Petrochemical Buildings". In Structures Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/41016(314)175.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

2

Salim, Hani A., Robert J. Dinan e John Kennedy. "Blast-Retrofit of CMU Walls Using Steel Sheets". In Structures Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40889(201)23.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

3

Crawford, John E., Kenneth B. Morrill, Joseph M. Magallanes e Youcai Wu. "Retrofit of Masonry Walls to Enhance Their Blast Resistance". In Structures Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/41016(314)92.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

4

Sari, Ali, Mark Whitney e Walt Sawruk. "Blast Analysis and Retrofit of Structures in Industrial Facilities". In Structures Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)229.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

5

Hutchinson, T. C., K. N. Nicolaisen e K. B. Morrill. "Blast Retrofit Strategies For Masonry Walls: Exploratory Experimental Study". In Structures Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40700(2004)19.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

6

Williamson, Eric B., e Kirk A. Marchand. "Recommendations for Blast-Resistant Design and Retrofit of Typical Highway Bridges". In Structures Congress 2006. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40889(201)176.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

7

Marchand, K., C. Davis, E. Conrath, P. Votruba-Drzal, E. Millero e G. Yakulis. "Structural retrofit of glazing systems with polymer materials for blast resistance". In SUSI 2010. Southampton, UK: WIT Press, 2010. http://dx.doi.org/10.2495/su100161.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

8

Moradi, Lee, James Davidson e Robert Dinan. "Resistance Definition for Membrane Retrofit Concrete Masonry Walls Subjected to Blast". In Structures Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41031(341)136.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

9

Weaver, M. K., G. D. Wight, J. M. Magallanes e J. E. Crawford. "Comparing Blast-Resistant Concrete Column Retrofit Materials from a Cost Perspective". In International Conference on Sustainable Design, Engineering, and Construction 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412688.093.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

10

Morrill, K. B., L. J. Malvar, J. E. Crawford e J. M. Ferritto. "Blast Resistant Design and Retrofit of Reinforced Concrete Columns and Walls". In Structures Congress 2004. Reston, VA: American Society of Civil Engineers, 2004. http://dx.doi.org/10.1061/40700(2004)154.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

Relatórios de organizações sobre o assunto "Blast retrofit":

1

Anderson, Mark, e Dov Dover. Lightweight, Blast-Resistant Doors for Retrofit Protection Against the Terrorist Threat. Fort Belvoir, VA: Defense Technical Information Center, fevereiro de 2003. http://dx.doi.org/10.21236/ada419496.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

2

Anderson, Mark, e Dov Dover. Sealed, Blast-Resistant Windows for Retrofit Protection Against the Terrorist Threat. Fort Belvoir, VA: Defense Technical Information Center, fevereiro de 2003. http://dx.doi.org/10.21236/ada419497.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.