Need a book? Engineering books recommendations...
Fwd: [Q] SEAOC-1996: Article C402.10 & C407.3[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: wai(--nospam--at)euken.com
- Subject: Fwd: [Q] SEAOC-1996: Article C402.10 & C407.3
- From: rlewis(--nospam--at)techteam.org (Richard Lewis)
- Date: 06 Aug 1997 14:57:26 GMT
Hi, I am designing a long and narrow concrete slab (floor diaphragm) and am required to take into account the new SEAOC provisions included in the 1996 edition. I ordered the 1996 Blue Book but until it arrives would like kindly to ask you the following questions: 1. For what forces shall floor diaphragms be designed? (Rw-factor, overstrenght etc.) 2. My client cited the following articles from the new edition of the Blue Book. My question: What is the background behind the requirement of increased minimum thickness of concrete cover for a slab? Do you know of a reference (paper or book) which treats this new requirements detailed? Thank you in anticipation. SEAOC 1996: Article C402.10: "In response to the 1994 Northridge earthquake damage where spalling of concrete around these types of bars rendered the bars ineffective ..." SEAOC 1996: Article C407.3: "In Northridge it was observed that large diameter chord and collector bars and/or closely spaced lap splices tended to break away the limited concrete cover, especially in concrete topped precast slab systems. It was apparent that the reinforcement so exposed underwent large, possibly inelastic, displacement levels. Once the concrete cover spalled, the chord/ collector bars were rendered ineffective and in some cases catastrophic building failures ensued" ..."min. concrete cover over tie beams = 2.5 * diameter of reinforcement, but not less than 50 mm" Peter Rangelow ==================================================== Deutschherrnufer 29 tel : + (49-69) 6199-1806 60594 Frankfurt am Main fax : + (49-69) 6199-1805 GERMANY rangelow(--nospam--at)dialup.nacamar.de ==================================================== --- Internet Message Header Follows --- Received: from server1.seaoc.org (bqe.com [22.214.171.124]) by host1.texramp.net (8.8.5/8.8.5) with SMTP id QAA07581 for <rlewis(--nospam--at)techteam.org>; Tue, 8 Apr 1997 16:56:32 -0500 (CDT) Received: from authsrv.nacamar.de by server1.seaoc.org (NTList 3.02.10) id ga016932; Tue, 8 Apr 1997 13:36:31 -0700 Received: from PETEL.nacamar.de ([126.96.36.199]) by dialup.nacamar.de (8.8.5/8.7.3) with SMTP id WAA06060 for <seaoc(--nospam--at)seaoc.org>; Tue, 8 Apr 1997 22:33:46 +0200 (MET DST) Message-Id: <188.8.131.5270408203339.006a26c8(--nospam--at)dialup.nacamar.de> X-Sender: seaoc-ad(--nospam--at)seaoc.org X-Mailer: Windows Eudora Pro Version 2.2 (32) Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Tue, 08 Apr 1997 22:33:39 +0200 To: seaoc(--nospam--at)seaoc.org From: Peter Rangelow <rangelow(--nospam--at)dialup.nacamar.de> Subject: [Q] SEAOC-1996: Article C402.10 & C407.3 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 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.
- Prev by Subject: Fwd: [Q] Plastic Deformation in a diaphragm
- Next by Subject: Fwd: Re: Advertising
- Previous by thread: Fwd: Structural Inspections and Observation Outline needed
- Next by thread: Fwd(2): plywood shear transfer detail