Fragility curves for rc structure under blast load. 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. Whether you are a mining engineer designing blasts everyday, a manager looking for a better control of blasting operation or a blaster starting out learning how to improve blast design, dna blast software has the right tools for you. Single degree of freedom sdof method is a simple analytical approach that is the basis of. A subsequent group of articles is concerned with the accurate. A novel powder factor based bench blast design method for. Rr405 design, materials and connections for blastloaded. Feb 01, 2008 the book subsequently considers the significant design differences between conventional and nuclear loads and between existing design procedures and stateoftheart information from recent research. 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. Performing organization names and addresses baker engineering and risk consultants 3330 oakwell court, suite 100, san antonio, texas 782183024 8.
Comparison of traditional and herculite xp glazing subject. The sdof method is a simple approach with acceptable precision and is the basis of many references of analysis and design of structures under blast and explosion 12345. An explanation of the nature of explosions and the mechanism of blast waves in free. Design of blastresistant buildings in petrochemical. 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. The eurocode en 199117 1 makes reference to the case of accidental loads and explosions, but it is mainly focused on. 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. On the other hand, the structural design itself is evolving to a more general. This set of slides covers the fundamental concepts of structural dynamics of linear elastic singledegreeoffreedom sdof structures. Comparison of sdof analysis results to test data for.
Axial force has a great influence on the dynamic behavior and the impact resistance of concretefilled steel tubular cfst members. Once the equivalent sdof system is defined, the total structural response can thus be represented by the dynamic equation of motion with the sum of an inertial term based on the mass of the structure and a stiffness term based on the structures geometrical and material properties which act in opposition to the applied blast load. Validity of sdof models for analyzing twoway reinforced. Jack greene is president of jackson productivity research inc. Learn interior design with these popular books and textbooks. Disagreement occurs also in the analysis of failure conditions, selection of adequate economic materials and e. Other recently published books on the topic of blast resistant design include two. The sdof response spectrum method usually gives less conservative results than simplified procedures, yet is easy to perform. Lbyds experience, knowledge of the antiterrorism force protection requirements, and team oriented design methodology is an essential part of any blast protection project. Use of sbeds for blast resistant design in accordance with. Structural dynamics of linear elastic singledegreeof. Army corps of engineers, protective design center pdc as a tool to design structural components to resist blast loads. The popularity of the sdof method in blast resistant design lies in its simplicity and costeffective. Design charts for the maximum responses in the sdof system with elastic perfectly plastic materials are available in many textbooks and.
Biggs has published the data for both elastic and plastic analysis. 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. 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. Generates blast plan and according to the delay pattern structure, simulation. Calculation of blast loads for application to structural. Improved sdof approach to incorporate the effects of axial. Equivalent lateral force procedure gives base shear in terms of design spectrum and period of vibration. Mine excellence mining software solutions for the mining. If you want to download or read this book, copy link or url below in the. He has implemented dozens of layout, expansion, relocation, consolidation and integration, productivity improvement, work measurement, and cost reduction projects in the us and internationally for manufacturing companies both large fortune 250 and small. The foundation of sbeds is an sdof numerical integration scheme capable of analyzing a resistance function with five linear segments for initial response and five linear segments for rebound. Users may purchase an additional certificate for completion of the blast software online training. For the most versatile and powerful blasting design solution.
I blast 7 software provides a professional editing document system. The sdof response spectrum method, presented in this educational module, can be used as long as the equipment and supports can be modeled by a singledegreeoffreedom system consisting of a spring, mass and damping. Based on numerical simulation and theoretical analysis, the impact response and deflection calculation method for axially loaded cfst members subjected to lateral impact are investigated in this paper. Pdf the paper deals with the analysis of structures subjected to blast load. Occupational safety and health administration osha requirements, design objectives, siting considerations, and load determination. Deflection calculation based on sdof method for axially. Chisquare sum and numerical minimization for parameter determination. 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.
Moreover when safety could be affected by a misreading information, i blast software offers a seamless way to produce clear professional blast design and simulation report. Approximation of blast loading and single degreeof. Earthquake design of equipment and supports by response. Based on a buildings threat assessment, lbyd provides blast engineering in accordance to ufc 401002 and ufc 33401.
Prediction of blast response in laminated glass sciencedirect. Unique single reference supports functional and costefficient designs of blast resistant buildings. Except for highthreat scenarios associated with military and diplomatic facil. Blast resistant building design criteria october 2014 process industry practices page 4 of 23 conventional loads. Nonductile concrete design such is used in nonseismic design can perform badly, as is witnessed by the collapse of the alfred p. 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. Blast design software blasting pattern software blast. Sdof response model parameters from dynamic blast loading. Handbook for blast resistant design of buildings donald o. Then, introduced sdof method is used for drawing pressureimpulse pi diagram of the column with considering the presence of axial compressive load. The sdof model in the form of a portal frame was designed to withstand a typical seismic. 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. For structural design, the tm 50 provisions adopted sdof. Design techniques for structures to resist blast loadings have been developed.
For each set of parameters c 1, c n c we compute with standard numerical routines see e. 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. According to the results, introduced sdof model has simple and. Apr 30, 2015 blast resistant design 10 shock wave velocity, u fts ref eq 3. Building importance is the key factor in blast design of structures. Our books are perfect for professionals or as a textbook for classroom use. Sdof isnt deadthe role of single degree of freedom analysis. The technical guidance, design guide for stainless steel blastwalls 2 tn5, by the fire and blast information group is based on the sdof method. Eindhoven university of technology master dynamic response of. Structural dynamics of linear elastic singledegreeoffreedom sdof systems. A separate topic covers the analysis of linear elastic multipledegreeoffreedom mdof systems. Dcms includes robust singledegreeoffreedom sdof and twodegreeoffreedom.
This updated edition provides general guidelines for the structural design of blast resistant petrochemical facilities. 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. In current sdof design methods used for laminated glass under blast loading, biggs elastic data is usually used for the precracked phase of the response and the plastic data is used for the postcrack phase of response. 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. Appendix b principles of blast resistant design this appendix provides a summary of pertinent information used by the civilstructural engineer who is involved in evaluating behavior of buildings subjected to explosions and in the design or upgrade of buildings for explosion effects.
Sbeds single degree of freedom blast effects design spreadsheet is an excel workbook that is distributed by the u. 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. Some attributes of ductile design for blast design are as follows. Areas covered by this appendix include evaluation of. Our aim is to determine the best parameters for a given resistance function r c 1, c n c. Equivalent singledegreeoffreedom analysis for blastresistant. Blast design, blast optimization, blast data collection and analytics accessible anywhere anytime in an integrated manner. Handbook for blast resistant design of buildings researchgate. Book soft target protection theretical basis and practical measures viacheslav. Loads applied in the conventional non blast design of structures including dead, live, wind, and seismic loads as required by local building codes. Urgessa and maji 2006 used an equivalent nonlinear sdof model to validate blast tests on fullscale masonry wall.
Use of sbeds for blast resistant design in accordance with ufc 334002 5a. Sbeds sbeds singledegreeoffreedom blast effects design spreadsheets is an excelbased tool for design of structural components subjected to airblast using singledegreeoffreedom sdof methodology. Doing the right impression the first time is key for business. Blast safety of the building envelope whole building design. Sdof isnt deadthe role of single degree of freedom. 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. Blast loading and blast effects on structures an overview. Dynamic component modeling software dcms assists engineers in the analysis and design of building structures walls, roofs, frames, window frames, etc.
It also summarizes existing blast resistant design approaches and describes the dynamic responses of structural systems to blasts, shocks, and. Singledegreeoffreedom blast effects design spreadsheets. Span the wall floor to floor rather than from column to column. Structural dynamics, dynamic force and dynamic system. Blast resistant design of steel structures tennessee research. This scheme, which allows for softening in either phase, is illustrated in figure 1. The platform is currently used by tier1 large mining companys cross mines, small mining companies at individual mines and blasting contractors. Blast resistant design 18 single degree of freedom sdof. In this paper, a complicated singledegreeoffreedom sdof approach was developed to determine the global response of steel columns under combined axial and blastinduced transverse loads. 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. 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. Jan 26, 2010 unique single reference supports functional and costefficient designs of blast resistant buildings 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. Standard 10 of ufc 401001 deals with the design of window openings in exterior walls. Pdf analysis of blast loaded structures researchgate.
This paper presents a comprehensive overview of the effects of explosion on structures. Blast design is therefore a necessary aspect of the design for building structures. Design charts for the maximum responses in the sdof system with elasticperfectly plastic materials are available in many textbooks and. Example problems for sbeds singledegreeoffreedom blast. 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. Analysis of the response of a onestorey onebay steel frame to.
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