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Fwd: Concentrated Load on Concrete Joist[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: addseaoc(--nospam--at)euken.com
- Subject: Fwd: Concentrated Load on Concrete Joist
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 30 Jul 1997 14:19:18 GMT
Treat the deck as a beam, running at right angles to the T-beams. Let = this beam be supported by springs at the location of each T-beam. Apply = your load at the actual location and get spring reactions under the = various T-beams. These reactions would show you the share of each = T-beam. The stiffness of the springs can be computed by placing any load = (preferably use a large value so that you do not loose significant = digits in deflection results, perhaps 100 Kips would be OK) on an = isolated individual T-beam, at such a distance from the support, where = the heavy actual load is placed on one of such beams. Solve the beam and = get its deflection, at the point of application of the applied load. Now = your deflection divided by the applied (100 Kips, if you use this value) = is the stiffness (force required to cause unit deflection).=20 The important question that I have still not answered is: what width to = assign to the part of the deck slab being modeled as a = beam-on-elastic-foundation. I am not very sure as to what width would be = realistic. But all I can say is that larger the width you use, stiffer = would be the beam-on-elastic foundation and, in comparison, more = flexible would be the elastic supports and greater would seem to be the = distribution of the real load to T-beams other than the one on which the = applied load directly rests. If you use the actual contact width of the = load as the width of the beam, perhaps you would tend to get a lower = bound on the actual distribution. Actual distribution would be at least = the computed value but possibly more. I am sure someone can point out a better estimate of the width. Rizwan Mirza, P.E. Lahore, Pakistan amirr(--nospam--at)paknet1.ptc.pk --- Internet Message Header Follows --- Received: from server1.seaoc.org (bqe.com [18.104.22.168]) by host1.texramp.net (8.8.5/8.8.5) with SMTP id OAA24475 for <rlewis(--nospam--at)techteam.org>; Thu, 13 Feb 1997 14:24:56 -0600 (CST) Received: from [22.214.171.124] by server1.seaoc.org (NTList 3.02.10) id na003601; Thu, 13 Feb 1997 12:19:20 -0800 Received: from paknet1.ptc.pk by paknet1.ptc.pk; (5.65v3.2/126.96.36.199/14Apr96-0132PM) id AA30510; Fri, 14 Feb 1997 01:17:07 +0500 Received: by aamirr with Microsoft Mail id <01BC1A13.5240A3C0@aamirr>; Fri, 14 Feb 1997 01:06:34 +-500 Message-Id: <01BC1A13.5240A3C0@aamirr> From: ARW <amirr(--nospam--at)paknet1.ptc.pk> To: "'seaoc(--nospam--at)seaoc.org'" <seaoc(--nospam--at)seaoc.org> Subject: Concentrated Load on Concrete Joist Date: Fri, 14 Feb 1997 01:06:30 +-500 Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Reply-To: seaoc(--nospam--at)seaoc.org Error-To: seaoc-ad(--nospam--at)seaoc.org X-Loop: seaoc(--nospam--at)seaoc.org X-Info: [SEAOC] Owner: seaoc-ad(--nospam--at)seaoc.org X-POP3-Rcpt: seaoc-ad(--nospam--at)seaoc.org X-Sender: seaoc-ad(--nospam--at)seaoc.org Precedence: list X-ListMember: rlewis(--nospam--at)techteam.org [seaoc(--nospam--at)seaoc.org] __________________________________________________ Richard Lewis, P.E. Missionary TECH Team rlewis(--nospam--at)techteam.org The service mission like-minded Christian organizations may turn to for technical assistance and know-how.
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