Impact Shock Waves (by Explosion) on Building Structures
Impact Shock Waves (by Explosion) on Building Structures
(OP)
Dear All,
There was an explosion in Lahore this morning and we were called in to evaluate structural strength of one of our client's Building (RCC structure)amid the situation. The building was within 2 Km from explosion site and has observed minute cracks in architectural finishes, building being an old RCC Structure, however did not face any structural cracks. What is an overall impact of such shock waves on building structures?
There was an explosion in Lahore this morning and we were called in to evaluate structural strength of one of our client's Building (RCC structure)amid the situation. The building was within 2 Km from explosion site and has observed minute cracks in architectural finishes, building being an old RCC Structure, however did not face any structural cracks. What is an overall impact of such shock waves on building structures?
Engr. Shakeel Ahsan
Director Engineering
CMEC - Pakistan






RE: Impact Shock Waves (by Explosion) on Building Structures
I did a report in Winnipeg many years ago about a propane tank explosion on a multistorey curtain wall. The suction from the reflected force did greater damage. Anchorages were pulled out of the aluminum extrusions for the curtain wall.
Dik
RE: Impact Shock Waves (by Explosion) on Building Structures
RE: Impact Shock Waves (by Explosion) on Building Structures
Dik, can I get your report?
Engr. Shakeel Ahsan
Director Engineering
CMEC - Pakistan
RE: Impact Shock Waves (by Explosion) on Building Structures
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RE: Impact Shock Waves (by Explosion) on Building Structures
The US FEMA has a bunch of handbooks regarding terrorist attacks and resistant building design:
http://www.fema.gov/plan/prevent/rms/
TTFN
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RE: Impact Shock Waves (by Explosion) on Building Structures
Dik
RE: Impact Shock Waves (by Explosion) on Building Structures
I did a quick pressure and impulse calculation using a charge of very close to your quoted weight (however, since I do not know what type of explosive it was) therefore, I assumed it to be TNT. Based on my output, here is what you will get at 90 degrees:
Range Shock-Velocity Time of arrival Pressure Impulse Load Duration
Feet FPMsec Msec PSI PSI-msec Msec
1.7 23.06 0.08 8037.28 3298.82 0.82
1000 1.12 819.17 0.34 8.9 51.34
Regards,
Lutfi