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brij_raychanda SEFI Member
Joined: 24 Oct 2009 Posts: 8
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Posted: Tue May 11, 2010 4:33 pm Post subject: dynamic properties of concrete |
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In high strain loading what is the properies of concrete?
what will be its elastic modulus?
any impirical formulas are available? |
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suraj General Sponsor
Joined: 17 Apr 2008 Posts: 5744 Location: NCR Faridabad, E mail suraj_engineer@yahoo.co.uk
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Posted: Tue May 11, 2010 6:10 pm Post subject: Concrete properties |
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Concrete properties
Would question be elaborated further about high strain loading?
Modulus of Elasticity could be computed using relation Ec= 5700 under root fck N/sqmm. fck is characteristic cube strength in N/sqmm
Regards _________________ Thanks & Warm Regards
IntPE(India)Suraj Singh FIE Civil
Engineering & Arbitration
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brij_raychanda SEFI Member
Joined: 24 Oct 2009 Posts: 8
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Posted: Fri May 14, 2010 5:27 am Post subject: |
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Actually i am doing my thesis on progressive collapse due to blast.
In that while applying blast, property of concrete doesnot remain same as it is before.
In high strian rate loading its modulus of elasticity will decrease but how much that i dont know.
So i needed some impirical formula or any values which i can apply.. |
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sukanta.adhikari General Sponsor
Joined: 26 Jan 2003 Posts: 726
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Posted: Fri May 14, 2010 9:13 am Post subject: |
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Some values of dynamic young's modulas are given in IS 2974 which are for machine foundation.
You can refer "soil dynamics book" by swamisaran.
Regards,
S.Adhikari
brij_raychanda wrote: | Actually i am doing my thesis on progressive collapse due to blast.
In that while applying blast, property of concrete doesnot remain same as it is before.
In high strian rate loading its modulus of elasticity will decrease but how much that i dont know.
So i needed some impirical formula or any values which i can apply.. |
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brij_raychanda SEFI Member
Joined: 24 Oct 2009 Posts: 8
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Posted: Sun May 16, 2010 5:35 pm Post subject: |
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Thank u sir.
I will surely check it. |
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brij_raychanda SEFI Member
Joined: 24 Oct 2009 Posts: 8
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Posted: Thu Aug 12, 2010 4:52 am Post subject: |
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Adhikari sir,
As per your suggestion i have checked in IS 2974 & swamisaran book but they are based on soil properties.
And it will be different in my case.
Even in IS 4997 properties are given but they are in relation with soil which are also different then my case.
If anybody knows concrete properties at high strain rate(blast load) then please reply ASAP. |
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sukanta.adhikari General Sponsor
Joined: 26 Jan 2003 Posts: 726
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Posted: Thu Aug 12, 2010 5:15 am Post subject: |
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Please read the book.
Design of blast resistant building in petrochemical facilities published by ASCE..
There are experts in oil and gas sector in the forum..They may better guide u..
Regards,
S.Adhikari
brij_raychanda wrote: | Adhikari sir,
As per your suggestion i have checked in IS 2974 & swamisaran book but they are based on soil properties.
And it will be different in my case.
Even in IS 4997 properties are given but they are in relation with soil which are also different then my case.
If anybody knows concrete properties at high strain rate(blast load) then please reply ASAP. |
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vandana_verma SEFI Member
Joined: 10 Aug 2010 Posts: 10
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Posted: Thu Aug 12, 2010 5:20 am Post subject: |
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In IS 456 - 2000 formula for calculation of modulus of elasticity is revised and it is 5000 under root fck N/sqmm in place of 5700 under root fck.
Regards,
Vandana |
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Dr. N. Subramanian General Sponsor
Joined: 21 Feb 2008 Posts: 5538 Location: Gaithersburg, MD, U.S.A.
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Posted: Thu Aug 12, 2010 4:31 pm Post subject: |
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Hi Er Brij Raychanda
Please find enclosed two papers which give dynamic properties of concrete.
Best wishes
NS
brij_raychanda wrote: | Adhikari sir,
As per your suggestion i have checked in IS 2974 & swamisaran book but they are based on soil properties.
And it will be different in my case.
Even in IS 4997 properties are given but they are in relation with soil which are also different then my case.
If anybody knows concrete properties at high strain rate(blast load) then please reply ASAP. |
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ahujavipul General Sponsor
Joined: 26 Jan 2003 Posts: 230
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Posted: Fri Aug 13, 2010 3:16 am Post subject: Concrete properties |
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Dear Er. Brij:
Check ACI's SP 60. "Vibrations of concrete structures". An older publication--collection of papers on the subject you might find useful.
Regards
Vipul Ahuja
brij_raychanda wrote: | Actually i am doing my thesis on progressive collapse due to blast.
In that while applying blast, property of concrete doesnot remain same as it is before.
In high strian rate loading its modulus of elasticity will decrease but how much that i dont know.
So i needed some impirical formula or any values which i can apply.. |
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