Additionally, if the explosive charge has the potential of producing damaging fragments, provisions must be made to arrest the fragments. The popularity of the sdof method in blast resistant design lies in its simplicity and costeffective. If you want to download or read this book, copy link or url below in the. Nonductile concrete design such is used in nonseismic design can perform badly, as is witnessed by the collapse of the alfred p. We have made it on to the list of aggressively creative, goaldriven mavericks featured in 64gb, a 250page book of design by 64 great british studios and creatives. Chapter 8 design examples blastresistant highway bridges. You can create and edit drill patterns using templates and standard patterns, view and manipulate drill patterns and pit shells in three dimensions. Some attributes of ductile design for blast design are as follows. Structural dynamics department of civil and environmental engineering duke university henri p. Pdf a new nonuniform blast load model for sdof method. Blast design is therefore a necessary aspect of the design for building structures globally and as such.
In recent years, there has been a considerable increase in perceived risks of blast loading attacks or similar incidents on structures. The book begins by discussing free vibration of singledegreeoffreedom sdof systems, both damped and undamped, and forced vibration harmonic force of sdof systems. The analysis and design of structures subjected to blast loads require a detailed understanding of blast phenomena and the dynamic response of various structural elements. Aci 370r14 report for the design of concrete structures. The book starts with an overview of key physicsbased algorithms for blast and fragment environment characterisation, structural response analyses and structural assessments with reference to a terrorist attack in an urban environment and the management of its inherent uncertainties. Apr 30, 2015 blast resistant design 10 shock wave velocity, u fts ref eq 3. Many design manuals, such as tm50 12 and ufc334002. The eurocode en 199117 1 makes reference to the case of accidental loads and explosions, but it is mainly focused on. In this method, only the explosion energy and distance from the centre of explosion are required to find the damage by using simple predictive models in terms of empiricaltype formulas.
Create your own blast design using versatile tools. The use of the sdof approach for analysis and design of blast loaded structural components is discussed in many textbooks and blast design manuals from the u. Occupational safety and health administration osha requirements, design objectives, siting considerations, and load determination. Blast design log form 50m8 download pdf publication date. Pdf a new nonuniform blast load model for sdof method of.
Sbeds single degree of freedom blast effects design spreadsheets dale nebuda, p. Structural dynamics of linear elastic singledegreeof. Equivalent singledegreeoffreedom analysis for blast. A novel powder factor based bench blast design method for. A subsequent group of articles is concerned with the accurate. On the other hand, the structural design itself is evolving to a more general. Unique single reference supports functional and costefficient designs of blast resistant buildings. Handbook for blast resistant design of buildings donald. Comparison of traditional and herculite xp glazing subject. Blast safety of the building envelope whole building design. Part 1, design considerations, sets forth basic principles, examining general considerations in the design process. The software is intended for the design of beams and slabs subject to a dynamic blast load, and allows for easy determinations of the response deflection and reactions of the actual element, and compares it to the response criteria as established by the client.
Contact blast resistant design seguridad frente acciones. Design of concrete masonry walls for blast loading tek 1421a structural 2014 introduction compared to the typical forces usually included in building design, such as wind and seismic, there are many unique considerations involved in blast design. The use of single degree of freedom sdof analysis for the design of columns under nonuniform blast load is investigated and, through comparison with dynamic finite element analysis, the limits of validation are identified for calculation of lateral displacements and dynamic reaction forces. The handbook for blast resistant design of buildings features contributions from some of the most knowledgeable and experienced consultants and researchers in blast resistant design. After determining the distribution of the blast loads on the overall building see blast resistant building design part 1, defining the blast loads, the engineer must distribute the loading to the individual structural member.
A design example for a col umn in each design category is provided. The quick and affordable way to create blast design, i blast standard is the ideal solution for blaster or mining engineers. Comparison of sdof analysis results to test data for. Calculation of blast loads for application to structural. Blastplanpro is a graphically based initiation design and simulation package for shotfirers, drill and blast engineers.
Design and analysis of blast loaded windows sciencedirect. Blast assessment of load bearing reinforced concrete shear. Pdf analysis of blast loaded structures researchgate. Blast design is therefore a necessary aspect of the design for building structures globally and as such building design must adapt accordingly.
One of the most critical parameters for blast loading computations is the distance of the detonation point from the structure of interest. True balanced integrated design of blast enhanced facade. Fragility curves for rc structure under blast load. Other simplified methods using equivalent single degree of freedom sdof system910 11 are common for blast design of structures.
The quick and affordable way to create blast design, iblast standard is the ideal solution for blaster or mining engineers. Use of sbeds for blast resistant design in accordance with. Blast resistant design 18 single degree of freedom sdof. Sdof isnt deadthe role of single degree of freedom. After the blast soldiers of new eden book 1 kindle edition by knighton, t. Blast resistant design seguridad frente acciones extremas. Response to periodic dynamic loadings and impulse loads are also discussed, as are two degrees of freedom linear system response methods and free vibration of multiple degrees. These charts provide data for large scaled distances, namely, in the far field. This law states that it is necessary for some force to act in order to initiate motion of a body at rest or to change the velocity of a moving body. This updated edition provides general guidelines for the structural design of blastresistant petrochemical facilities.
Blast design software blasting pattern software blast. This paper discusses the development of a sdof based procedure for designing frp upgrades to blast loaded masonry and concrete walls by protection engineering consultants for the u. Singledegreeoffreedom blast effects design spreadsheets. Army corps of engineers protective design center to meet department of defense dod. An explanation of the nature of explosions and the mechanism of blast waves in free.
Nonlinear section and member analyses were incorporated into the suggested sdof method to account for the complex features of the material behavior, the high strain rate effect, and the column geometry. Design charts for the maximum responses in the sdof system with. The deformation is allowed up to the ductility limit. In this paper, a complicated singledegreeoffreedom sdof approach was developed to determine the global response of steel columns under combined axial and blast induced transverse loads. Both sdoftype model 12 and continuous beam model are used for developing pi diagrams. Analysis of the response of a onestorey onebay steel frame to.
Generates blast plan and according to the delay pattern structure, simulation. Sbeds calculates the parameters of the equivalent sdof system and determines the dynamic response using a timestepping sdof calculator. The designer can take advantage of using the sif and dif applied to the steel minimum yield strength, as detailed in section 10. Blast analysis was performed based on sequences of nonlinear analysis using sap2000 and sdof approximation technique at different standoff distances. Blast designer software blades calculates blast plan parameters, explosives charge distribution, initiation timing and sequence, results in terms of rock breakage and fragment size distribution. Blast load can be input manually, read from an input file, or generated for a hemispherical surface burst given the charge weight and standoff distance. The explosion model herein is a tno multiphysic method. The ductility is very important in design of structures under extreme and blast loading 2, 3, 8 and is the ratio of maximum plastic deformation to the elastic limit given by. A predictive model for damage assessment and deformation in. While the intent of this section is to describe the blastresistant design process for bridge columns, it is not meant to provide a tutorial on developing the sdof analysis procedure, and bigga s intro duction to structural dynamics 1964 and the u. Structural dynamics of earthquake engineering sciencedirect. Blast assessment of load bearing reinforced concrete shear walls.
This updated edition provides general guidelines for the structural design of blast resistant petrochemical facilities. Numerical example for a steel blast wall with pitch p. Blast resistance of coldformed steel buildings sciencedirect. Sdof model gives reasonable good results if the response mode shape is representative of the real behavior.
Ecb 200410 single degree of freedom blast effects design. The response of building to a blast load may be analyzed using dynamic structural analyses ranging from the basic single degree of freedom analysis sdof method to. The sdof model in the form of a portal frame was designed to withstand a typical seismic. The popularity of the sdof method in blast resistant design lies in its simplicity and costeffective approach that requires limited input data and less computational effort. Armya s tm 50 structures to resist the effects of accidental explosions department of. Analysis of glass panels subjected to blast load springerlink. Reference manual to mitigate potential terrorist attacks against buildings. L download it once and read it on your kindle device, pc, phones or tablets. Dynamics of simple oscillators single degree of freedom systems cee 541. In this paper, a new method is developed to find the ductility ratio in blast walls, resulted by hydrocarbon explosions. Analysis of the response of a onestorey onebay steel.
It is one of the existing proles of the blast wall that is described in 1. Instructional material complementing fema 451, design examples sdof dynamics 3 3 importance in relation to asce 705 ground motion maps provide ground accelerations in terms of response spectrum coordinates. In this book it is tried to investigate the dynamic response and damage of rc framed structure under external blast loading using recommended procedures and code provisions. The design of concrete structures for blast resistance. Ufc 401001 recommends a dynamic design approach using sdof analysis and a strength design with load factors of 1.
Span the wall floor to floor rather than from column to column. Energy solutions for specific structural components. This paper presents a comprehensive overview of the effects of explosion on structures. An information series from the national authority on concrete masonry technology ncma tek 1421a replaces tek 1421 1 design of concrete masonry walls for blast loadingtek 1421a structural 2014 introduction compared to the typical forces usually included in build ing design, such as wind and seismic, there are many unique considerations involved in blast design. Resistance functions for specific structural forms. A good book that goes beyond what is covered in the class. The basic analytical model used in most blast design application is the single degree of freedom sdof system. Design of buildings to optimize resistance to blast loading, thomas telford publications, london, uk, 1995.
Members of the aisc blast and impact resistant design committee and. Fema 451b topic 3 notes slide 2 instructional material complementing fema 451, design examples sdof dynamics 3 2 structural dynamics equations of motion for sdof structures structural frequency and period of vibration behavior under dynamic load dynamic magnification and resonance effect of damping on behavior linear elastic response spectra. The united states government has taken the lead in creating blast guidelines for its buildings. Analysis of sdof systems subjected to idealized blast load. The design of structural containments for testing small explosive devices requires the designer to consider the various aspects of the explosive loading, i. Dynamics of simple oscillators single degree of freedom. A good book but almost all the topics are already covered in the class. This chapter discusses the main design concepts to mitigate effects of blast in coldformed steel cfs buildings. Dynamics of simple oscillators single degree of freedom systems. Typically, the sdof analyses consider flexural component response, but they can also consider other response modes including compression and tension membrane, arching from axial loads, and component. Sbeds is an excel based tool for the design and analysis of structural components subjected to dynamic loads, such as airblast from explosives, using sdof. Theoretical and experimental modal analysis, research.
Structural dynamics, dynamic force and dynamic system. Structural dynamics, dynamic force and dynamic system structural dynamics conventional structural analysis is based on the concept of statics, which can be derived from newtons 1st law of motion. Eindhoven university of technology master dynamic response of. Request pdf sdof isnt deadthe role of single degree of freedom analysis in. Responses of structures to sdof vs mdof vibration testing. Improved sdof approach to incorporate the effects of axial. Research studies engineering design series, research studies pre. Blast design is therefore a necessary aspect of the design for building structures. In them, high vulnerability is frequently given by fenestrations or novel glass facade. A recent history of blast and collapse events section 8. Blast resistant design 8 peak dynamic wind pressure, qso 2 022. The software is intended for the design of beams and slabs subject to a dynamic blast load, and allows for easy determinations of the response deflection and reactions of the actual.
Except for highthreat scenarios associated with military and diplomatic facil. Protective structures subjected to blast loads are often evaluated using the equivalent singledegreeoffreedom sdof analysis. Use features like bookmarks, note taking and highlighting while reading after the blast soldiers of new eden book 1. The standard states that blast analysis using explosive threats provided in standard 1 should be performed for the supporting structural elements of windows and their connections at all standoff distances, even if the wall meets or exceeds the conventional construction. Standard 10 of ufc 401001 deals with the design of window openings in exterior walls. The backbone of the sdof model relies on the natural period of free structural vibration, 2, 3, 8 of the blast wall which will be given by.
Equivalent lateral force procedure gives base shear in terms of design spectrum and period of vibration. A predictive model for damage assessment and deformation. Design of blastresistant buildings in petrochemical. Book soft target protection theretical basis and practical measures viacheslav.
Currently all new and existing department ofdefense 000 facilities must conform to the unified facilities criteria u. Blast the use of single degree of freedom sdof analysis for the design of. Pdf blast effects on buildings download full pdf book. Aci 370r14 report for the design of concrete structures for. A novel powder factor based bench blast design method for large surface coal mines by andrew clifford blair a dissertation presented to the graduate faculty of the missouri university of science and technology in partial fulfillment of the requirements for the degree doctor of philosophy in mining engineering 2015 approved by. Now theres a single reference to which architects, designers, and engineers can turn for guidance on all the key elements of the design of blast resistant buildings that satisfy the new asce standard for blast protection of buildings as well as other asce, aci, and aisc codes. Singledegreeoffreedom sdof analyses are used to design many blastresistant structures, which is an important part of explosive safety. Pdf the paper deals with the analysis of structures subjected to blast load. Sdof analysis is widely accepted for blast design, but many designers are not aware of the large database of available comparisons between results from singledegreeoffreedom sdof analysis and blast test data. Example problems for sbeds singledegreeoffreedom blast.
Sdof isnt deadthe role of single degree of freedom analysis. Sdof approach is popularly used in design as it is straightforward to use. Easily import surveyed drilling pattern from from standard survey programs or just use the included prebuilt content to get started. Gavin fall, 2018 this document describes free and forced dynamic responses of simple oscillators somtimes called single degree of freedom sdof systems. Presented herein is an attempt to determine the numerical response of a seismically designed singledegreeof.
Sdof analysis is widely accepted for blast design, but many designers are not aware of the large database of available comparisons between results from. Sbeds singledegreeoffreedom blast effects design spreadsheet protective design center, us army. Design charts for the maximum responses in the sdof system with elasticperfectly plastic materials are available in many textbooks and manuals such as ufc 334002. John abruzzo john barsom jim brokaw nanci buscemi ed conrath john crawford. Urgessa and maji 2006 used an equivalent nonlinear sdof model to validate blast tests on fullscale masonry wall.
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