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Re: [WTC] Forces due to Aircraft Strike ...

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Dear USA friends: We are 100% with you.


On the subject of the e-mail:

Try "Impact and Explosion, Analysis and Design " by M.Y.H Bangash, CRC
Press, ISBN 0-8493-7742-0

For aircraft impact on structures, there is the Stevenson's direct impact
model, the Riera model and Wolf et al model; also included Impact force vs
time curves for many  aircraft models.

Adolfo Galvez, MSc
Lima - PERU


----- Original Message -----
From: Peter Rangelow <rangelow(--nospam--at)t-online.de>
To: <seaint(--nospam--at)seaint.org>
Sent: Friday, September 14, 2001 4:40 PM
Subject: [WTC] Forces due to Aircraft Strike ...


> Does someone know of a recent publication dealing
> with the impact forces due to a passenger aircraft strike ?
>
> There is a very useful publication on the topic by Jorge Riera
> in Nuclear Engineering and Design from 1968 but
> the impact force versus time curves in this paper were calculated
> for a Boeing 707-320 and 720 aircraft which are by far
> smaller than nowadays aircraft, e.g. 757/767-200.
>
> I would appreciate any comment very much !
>
> Warm regards to all of you - it is nice to see from the recent
> list contributions that we engineers are not "cold hearted" as
> some are suggesting.
>
> Finally, my heartfelt condolences are with the people who lost loved
> ones in this inhuman act of war. I pray for them to find peace.
>
> Peter Rangelow
>
>
>
>
> ----- Original Message -----
> From: "Ron Hill" <ronhill(--nospam--at)hillce.com>
> To: "Seaint@Seaint. Org" <seaint(--nospam--at)seaint.org>
> Sent: Friday, September 14, 2001 8:49 PM
> Subject: RE: IMPORTANT NOTICE REGARDING WTC
>
>
> > >I often feel that there is little I can do to help and would be glad to
> > participate >in any manner I can. I'm sure most of us feel this way. I
> urge
> > you all to unite >on this effort and help get whatever important support
> our
> > Engineers who are >in New York and helping need to do their job.
> > ************************************************************
> > Dennis,  I feel the same way.
> >
> >   We have to assume that all records and drawings were destroyed with
the
> > buildings.
> >
> > I would guess that only a small number of engineers worked on the
project
> > and the repair in 1993.  If Cad drawings exist I would assume the repair
> of
> > 1993 would be the best bet.
> >
> > I have repeated you message in "plain text" below for those who can not
> > receive html.
> >
> > Ronald Hill, P.E.
> > HILL Consulting Engineering
> > Birmingham, Alabama  USA
> > Phone: 205.823.4784
> > FAX: 205.823.4145
> > Email: ronhill(--nospam--at)hillce.com
> > Efax: 509.275.8095
> > http:\\www.hillce.com
> >
> >
>
****************************************************************************
> > *
> > Yesterday Neal Moore, SE posted a notice on the SEAINT list. Neal is a
> > California Engineer who is involved as a volunteer in the emergency work
> > being done in Manhattan with regards to the WTC. He requested
information
> > and specifically drawings from any engineer on the Listservice that may
> have
> > done work on the towers or who was involved in any way with the original
> > design.
> >
> > I received a phone call from Fred Turner, SE - California Seismic Safety
> > Commission - this morning asking if I had seen any follow-up on the
> message
> > sent by Neal or if there were any responses. I had not. Fred thought
this
> an
> > important and urgent message that we should not take likely or
disbelieve.
> >
> > There is a great deal of confusion occurring in New York. Neal's urgent
> > message was clearly indicative of this. I can't answer why his first
> > thoughts were not to contact Skilling directly, but assumed that they
need
> > drawings and information from anyone who worked on the towers since the
> 70's
> > in order to assist in the search and rescue efforts.
> >
> > Finally, I did not save Neal's message, but I'm sure others have. If
you
> > have any information that can be of assistance, please respond to the
> > contacts listed on Neals message, or you might consider contacting the
> > following people who were listed on a couple of Stan Caldwells email
posts
> > who should be able to get the information to Neal Moore:
> >
> > Greg Schindler, PE
> > NCSEA President
> > (206) 622-5822
> > (206) 622-8130 fax
> > Jeanne Vogelzang
> > execdir(--nospam--at)ncsea.com
> >
> >
> >
> > Vicki Arbitrio, PE
> > Secretary SEAoNY
> > SEAoNY Delegate to NCSEA
> > vicki.arbitrio(--nospam--at)gmsllp.com
> >
> > Finally, there are numerous Listservices and discussion forums related
to
> > structural engineering (some of the links can be found on my own
> > Structuralist.Net Website at
http://www.structuralist.net/Professional/ ):
> > Because of the urgency of Neals message, I think it would be prudent for
> any
> > of us who participate on those other forums to post Neal's message and
> > possibly the links listed above in an effort to find other professionals
> > with the information that Neal is requesting.
> >
> > If you have any information that needs to be forwarded regarding the
Trade
> > Towers that can help search and rescue and don't have the time or
> > opportunity to send an email to the links listed above, please send them
> to
> > me and I will make sure they get to the proper people.
> >
> > I often feel that there is little I can do to help and would be glad to
> > participate in any manner I can. I'm sure most of us feel this way. I
urge
> > you all to unite on this effort and help get whatever important support
> our
> > Engineers who are in New York and helping need to do their job.
> >
> > Sincerely,
> >
> >
> > Dennis S. Wish, PE
> > Structural Engineering Consultant
> > structures(--nospam--at)engineer.com
> > 760.564.0884 - Phone
> > 208.361.5447 - Efax
> >
> >
> >
> > *
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>
> *
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