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Article #383Re: Stacking freeways
From: Robb Briggs
Date: Tue, 14 Aug 2001 16:55
Date: Tue, 14 Aug 2001 16:55
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William Lynch <bozo.clown@big.top> wrote in message news:<3B782BD4.9BC7FE22@big.top>... > I (not an engineer) was under the impression that the main reasons > for the catastrophic failures of the double decker sections were > twofold: lack of flexibility in the joints, and lack of spiral rebar > to contain the vertical rebar. These both obviously relate to the > knowledge level of the 50s, but is it possible to address these > problem areas and build a functional double decker structure? Yeah, there were several reasons for the collapse of the Cypress Viaduct, although I think some of the problem was related to some of the joints being TOO flexible. It was a long time ago, so I don't really remember. But it's entirely possible to build a functional double decker structure, given that a comprehensive analysis is done before construction. It would have been impossible to do such an analysis without computers, which weren't in use in the 50's.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: fd3ff,aa5314338c14ea63 X-Google-Attributes: gidfd3ff,public X-Google-Thread: f59f9,865b7458dc0f15ec X-Google-Attributes: gidf59f9,public X-Google-ArrivalTime: 2001-08-14 09:55:20 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news2.google.com!postnews1.google.com!not-for-mail From: robb_4321@yahoo.com (Robb Briggs) Newsgroups: la.transportation,ba.transportation Subject: Re: Stacking freeways Date: 14 Aug 2001 09:55:19 -0700 Organization: http://groups.google.com/ Lines: 16 Message-ID: <8e360b53.0108140855.7818281d@posting.google.com> References: <88e6ca33.0108090052.98e157@posting.google.com> <3B72B2AA.CA9FBCA1@thegrid.net> <3B72C87B.38024F02@but.us.chickens> <88e6ca33.0108101737.4377befd@posting.google.com> <B799E2A0.4F10E%mmullen8014@home.com> <3B75372C.D1B811C@big.top> <8e360b53.0108130946.66e8b1@posting.google.com> <3B782BD4.9BC7FE22@big.top> NNTP-Posting-Host: 198.160.72.14 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: posting.google.com 997808119 17554 127.0.0.1 (14 Aug 2001 16:55:19 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: 14 Aug 2001 16:55:19 GMT