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Contents page  1. Introduction ……………………………………………………………………           .. 3 2. Types of blasts……………………………………………………………………        ...

1.SEMINAR ON DESIGN OF BLAST RESISTANT BUILDING



Contents page 

1. Introduction ……………………………………………………………………           .. 3

2. Types of blasts……………………………………………………………………         .. 4

3. Risk assessments……………………………………………………………………        .. 4

4. Principles of blast resistant design…………………………………………    5

5. Stand-off zones …………………………………………………………………….. 6

6. Access control …………………………………………………………………….. 6

7. Definition of blast load ……………………………………………………… 7

8. Guidelines for analysis ………………………………………………………   9

9. What effects structure must resist …………………………………… 9

10.  Localized effects on connections and members ………………. 10

11. Are blast loads serviceable …………………………………………………. 11

12. Design approach types ……………………………………………………… 12

a. Pressure impulse

b. Load response 

c. Redistribution of loads from removed column

13.  Member wise response and reinforcement ……………………… 15

14. Design procedure in detail ………………………………………………… 20

15.  Acceptable damage levels ……………………………………………… 22

16.  Difference between seismic and blast loads ………………….. 22

17. Conclusions …………………………………………………………………….. 24

18.  Reference …………………………………………………………………….. 25

Design of blast resistant structures        

1- Introduction

Blast resistant deign is a subject of interest for structural engineers these days hence becoming popular in the field of structural engineering. Since there are several terror attacks were faced in the society even fire accidents and arson there is a very much need of this subject to emerge. Many government and some private building owners today require that new buildings be designed to resist the effects of potential blasts and other incidents that could cause extreme local damage.In this discussion it may be possible to design buildings to resist such attacks without severe damage, the loading effects associated with these hazards and so intense that design measures necessary to provide such performance would result in both unacceptably high costs as well as impose unacceptable limitations on architectural design of such buildings.Fortunately, the probability that any single building will actually be subjected to such hazards is quite low. As a result, a performance based approach to design has evolved. The most common performance goals are to permit severe and even extreme damage should blasts or any other such incidents affect a structure, but avoid massive loss of life.Often, design to resist blast, impact and other extraordinary loads must be thought of in the content of life safety, not in terms of serviceability or lifecycle performance. The serviceability and reuse may be required for test facilities, but most commercial office and industrial facilities will not have to perform to these levels.Structures designed to resist the effects of explosives and impact are permitted to contribute all of their resistance, both material linear (elastic) and material non-linear (inelastic), to absorb damage locally, so as not to compromise the integrity of entire structure. It is likely that local failure can and may be designed to occur, due to uncertainty associated with such blast-loads.



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