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18、egal Notice.Standards Update ServiceS850-12April 2012Title: Design and assessment of buildings subjected to blast loadsTo register for e-mail notification about any updates to this publication go on-line to shop.csa.ca click on CSA Update ServiceThe List ID that you will need to register for updates
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21、ur Online Store at shop.csa.caor call toll-free 1-800-463-6727 or 416-747-4044.TMA trade-mar k of the Canadian S tandards Association, operating as “CSA Group”S850-12Design and assessment of buildings subjected to blast loadsS850-12Design and assessment of buildings subjected to blast loadsApril 201
22、2 CSA Group 1ContentsTechnical Committee on Blast Resistant Buildings 6Preface 91 Scope 101.1 General 101.2 Materials considered 101.3 Items not addressed 101.4 Terminology 101.5 Units of measurement 112 Reference publications 113 Definitions and abbreviations 143.1 Definitions 143.2 Abbreviations 1
23、93.3 Symbols 204 Performance criteria 234.1 General 234.2 Design basis threat 234.3 Performance objectives 244.3.1 General 244.3.2 Limiting progressive structural collapse 244.3.3 Limiting damage to structural components 244.3.4 Mitigating damage to building envelope 244.3.5 Minimizing flying/fallin
24、g debris 244.4 Performance requirements 244.4.1 General 244.4.2 Building and structure LOP 254.4.3 Component damage 254.4.4 Envelope damage 254.5 Performance evaluation 274.5.1 General 274.5.2 Response limits 274.5.3 Component damage level 335 Types of explosions 345.1 Explosion sources 345.2 Explos
25、ion analysis methodology 345.3 Design blast load 355.4 Default assumptions 355.5 Load combinations for ultimate limit state design 355.6 Interpretation of loads for structural analysis 365.6.1 General 365.6.2 Peak pressure and duration 36S850-12Design and assessment of buildings subjected to blast l
26、oadsApril 2012 CSA Group 25.6.3 Peak pressure and impulse 365.7 Blast parameters determination 366 Effects of explosion 366.1 General 366.2 Effects of geometry 376.2.1 Load variation 376.2.2 Reflection 376.2.3 Focusing 376.2.4 Clearing 376.2.5 Diffraction 376.2.6 Shielding 376.2.7 Reverberation 376.
27、2.8 Quasi-static pressure (internal explosions) and venting 377 Material properties under high strain rates 377.1 General 377.2 Materials 387.3 Dynamic design strength 387.3.1 General 387.3.2 Strength increase factor (SIF) 387.3.3 Dynamic increase factor (DIF) 387.3.4 Specified material strength 407
28、.4 Modulus of elasticity 408 Structural analysis 438.1 Scope 438.2 General 448.3 Analysis methods 448.3.1 Single-degree-of-freedom 448.3.2 Multi-degree-of-freedom 458.3.3 Finite element analysis 468.3.4 P-I diagrams 468.3.5 Response spectra 478.4 Explicit and implicit analysis 478.5 Constitutive mod
29、els 478.6 Damping 488.7 Computational fluid dynamics modelling 489 Structural design 499.1 General 499.1.1 Scope 499.1.2 Alternative design procedures 499.1.3 Structural interaction 499.1.4 Materials 499.1.5 Detailing 499.1.6 Controlling loads 499.1.7 Achieving design intent 509.1.8 Use of reference
30、 documents 50S850-12Design and assessment of buildings subjected to blast loadsApril 2012 CSA Group 39.1.9 Response limits 509.2 Concrete structures 509.2.1 General 509.2.2 General requirements 509.2.3 Columns 519.2.4 Beams 539.2.5 Beam-column joints 549.2.6 Slabs 549.2.7 Walls 559.2.8 Tension ties
31、559.3 Masonry structures 569.3.1 General 569.3.2 General requirements 569.3.3 Design requirements 579.4 Steel structures 589.4.1 Scope 589.4.2 General requirements 589.4.3 Design requirements 599.4.4 Flexural elements 609.4.5 Compression elements 619.4.6 Stability of structures and member 619.4.7 Lo
32、cal and lateraltorsional buckling 639.4.8 Frame systems 639.4.9 Steel wall systems 649.4.10 Sheet steel deck 649.4.11 Steel joists and joist girders 649.4.12 Connections 649.5 Wood structures 659.5.1 Scope 659.5.2 General 659.5.3 Light frame construction 659.5.4 Heavy wood construction 669.5.5 Conne
33、ctions 669.6 Fibre-reinforced polymer (FRP) composite materials 669.6.1 Scope 669.6.2 General 679.6.3 FRP strengthened reinforced concrete beams and slabs 679.6.4 FRP strengthened reinforced concrete columns 679.6.5 FRP confinement of steel reinforced concrete columns 679.6.6 FRP strengthened reinfo
34、rced concrete walls 689.6.7 FRP strengthened masonry walls 6810 Structural integrity and mitigation of disproportionate collapse 6810.1 Objectives and scope 6810.2 Design 6810.2.1 General requirements 6810.2.2 Localized overload 6910.2.3 Methods of progressive collapse mitigation 6910.2.4 Enhanced l
35、ocal resistance method 69S850-12Design and assessment of buildings subjected to blast loadsApril 2012 CSA Group 410.2.5 Alternative load path method 6910.3 Analysis techniques 6910.3.1 Scope 6910.3.2 Modelling 6910.3.3 Loads 7310.3.4 Element response 7410.3.5 Acceptance criteria 7811 Building envelo
36、pe design 7811.1 General requirements 7811.1.1 Scope 7811.1.2 Compliance 7811.2 General principles 7811.3 Windows, curtain walls, and skylights 7911.3.1 Glazing systems 7911.3.2 Glazing 7911.3.3 Frames 7911.3.4 Connection design 8011.3.5 Supporting structural components 8011.4 Blast resistant doors
37、8011.4.1 Orientation 8011.4.2 Door response criteria 8011.4.3 Door hardware 8011.4.4 Frame 8111.4.5 Glazing 8111.5 Exterior walls 8111.6 Retrofit of existing building envelope 8111.6.1 General 8111.6.2 Glazing 8111.6.3 Existing walls 8112 Assessment and mitigation 8212.1 Scope 8212.2 Screening asses
38、sment 8212.2.1 General 8212.2.2 Site survey 8212.2.3 Data collection 8212.2.4 Design basis threat 8212.2.5 Blast prediction 8212.2.6 Analysis 8212.2.7 Damage level summary 8212.2.8 Report 8312.3 Detailed assessment 8312.3.1 General 8312.3.2 Site survey 8312.3.3 Data collection 8312.3.4 Design basis
39、threat standoff 8312.3.5 Blast load prediction 8312.3.6 Analysis 84S850-12Design and assessment of buildings subjected to blast loadsApril 2012 CSA Group 512.3.7 Damage/protection level summary 8412.3.8 Report 8412.4 Blast hazard mitigation plan 8413 Test methods 8513.1 General 8513.2 Testing 85Anne
40、x A (informative) Additional information and alternative procedures 86Annex B (informative) Test methods 116S850-12Design and assessment of buildings subjected to blast loadsApril 2012 CSA Group 6Technical Committee on Blast Resistant BuildingsG. Razaqpur McMaster University, Hamilton, OntarioChairS
41、. Foo Public Works and Government Services, Gatineau, QubecVice-ChairH. Almansour National Research Council Canada, Ottawa, OntarioD. Barker ABS Consulting, San Antonio, Texas, USAP. Black City of Ottawa, Ottawa, OntarioC. Borgal Goldsmith Borgal b) provide an explanation of circumstances surroundin
42、g the actual field condition; andc) where possible, phrase the request in such a way that a specific “yes“ or “no“ answer will address the issue.Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are available on the Current Sta
43、ndard Activities page at standardsactivities.csa.ca.5) This Standard is subject to periodic review, and suggestions for its improvement will be referred to the appropriate committee. To submit a proposal for change, please send the following information to inquiriescsagroup.organd include “Proposal
44、for change“ in the subject line:a) Standard designation (number);b) relevant clause, table, and/or figure number;c) wording of the proposed change; andd) rationale for the change.S850-12Design and assessment of buildings subjected to blast loadsApril 2012 CSA Group 10S850-12Design and assessment of
45、buildings subjected to blast loads1 Scope1.1 GeneralThis Standard provides criteria for the analysis and design of new buildings and assessment of existing buildings to resist blast loading.Notes:1) The main objective of this Standard is to reduce human casualties and damage to assets due to an air
46、blast.2) It should be recognized that the extent and severity of an explosion cannot be predicted with certainty.3) The performance of the building and the safety of the occupants are functions of the selected level of protection and the design basis threat (DBT)4) Users should ensure they are famil
47、iar with applicable legislation. Where this Standard conflicts with applicable legislation, it is assumed that the legislation applies. For additional information on regulatory compliance, see Clause A.1.1.2 Materials consideredThis Standard provides design criteria for concrete, fibre-reinforced po
48、lymer (FRP), masonry, steel, and wood. This does not preclude the use of other materials (see Clause 9.1).Note: FRP design provisions apply to retrofit only.1.3 Items not addressed1.3.1 This Standard does not address risk assessment or apply to biological, chemical, cratering, electromagnetic pulse
49、(EMP), ground shock, fragmentation loads, induced fire, penetration, perimeter security, radiation, or thermal effects of explosions.Note: Although other effects of explosion such as fragmentation loads are important considerations, special design requirements have not been provided in this Standard.1.3.2 This Standard does not define a design basis threat (DBT). DBT is building and project specific and it should be specified by the building Owner and/or the authority having jurisdiction.1.4 TerminologyIn CSA Standards, “shall“ is used to express a requ
