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RE: Thin-walled compound cross-sections shareware ?[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: RE: Thin-walled compound cross-sections shareware ?
- From: rangelow.peter(--nospam--at)iks.hochtief.de
- Date: Tue, 3 Feb 1998 10:59:00 +0100
First of all, I would like to thank you Bill, Terry, Raghu and Graham for your quick replies. Actually, what I am looking for is an inexpensive program that calculates shear area and 2nd moments of inertia of thin-walled compound cross-sections. I have to check frequently dynamic analyses done by subcontractors. Often these are rc-structures with shear walls and cores. The quickest way to check such calculations is to create a small model of 3-D beam elements. The rc-cores are often thin-walled compound cross-sections which I usually represent by a beam with a shear and flexural rigidity. Hence, the program I am looking for shall be able to calculate the shear center, effective shear area and 2nd moments of inertia - incl. torsional. The responses which I received by now are not addressing fully my problem - I believe that the algorithm built-in in Autocad as well as in Shape Builder does not treat the separate elements as thin-walled (e.g. the deformation of the cross-section along the beam axis due to warping as well as shear loading is neglected, i.e. the assumtion that QS remain even is preserved). Please correct me if I am wrong in my assumption about Autocad and Shape Builder. I do not have access to both programs. Thanks in advance, Peter Rangelow Hochtief AG, Frankfurt, Germany =========================== 1 ======================= Von: Bill Allen, S.E. An: 'seaoc(--nospam--at)seaoc.org' Betreff: RE: Thin-walled compound cross-sections shareware ? Datum: Donnerstag, 29. Januar 1998 17:08 This isn't a "cheap" solution, but may be if you have AutoCAD. AutoCAD will calculate these properties for you. In R14, you convert your objects to a region (Draw/Region then select the objects you want to convert). Once you have a region, you can type at the command line "massprop" and then select all of the objects. the following is a sample of results (using a pipe): Command: massprop .... explanation follows ... You should be mindfull of where you are drawing your object with respect to the global X-Y axis. Hope this helps, Bill =========================== 2 ======================= Von: Terry Kubat An: Rangelow, Peter HVIK Betreff: Section properties Datum: Donnerstag, 29. Januar 1998 19:25 Mr. Rangelow, IES has a tool called ShapeBuilder that currently calculates the basic geometric properties for built-up sections. It is a graphical tool that is very easy to use. The version 1.0 product that we currently sell, for $95 US, will calculate the following: Width Height Area (A) Moments of inertia (I) Section modulus (S) Radius of gyration (r) Centroid Torsion constant (J) The software has a database of AISC steel shapes and NDS wood shapes (SS, GL). I am currently working on a version 2.0 that will also calculate more of the shear properties (shear center, warping constant, etc.) This version should be available within a couple months. For more information you might visit our web site at http://www.iesweb.com Terry Kubat IES Support Engineer, support(--nospam--at)iesweb.com phone: 406/586-2665, fax: 406/586-5671 =========================== 3 ======================= Von: Raghu S. pendyala An: seaoc(--nospam--at)seaoc.org Betreff: Re: Thin-walled compound cross-sections shareware ? Datum: Freitag, 30. Januar 1998 06:03 Doesn't seem to work with Autocad LT. Raghu Pendyala Pendyala Consulting, Civil and Structural Engineers Melbourne, Australia =========================== 4 ======================= Von: graham.fitch(--nospam--at)ibm.net An: seaoc(--nospam--at)seaoc.org Betreff: Re: Thin-walled compound cross-sections shareware ? Datum: Montag, 2. Februar 1998 21:37 On Thu, 29 Jan 1998 16:49:00 +0100, rangelow.peter(--nospam--at)iks.hochtief.de wrote: >Do you know of some good and inexpensive program >that calculates shear area and 2nd moments of inertia >of thin-walled compound cross-sections? I haven't seen it for a few years but I seem to recall that Roark's Formulas is/was available in spreadsheet form. Would that be the kind of thing you were looking for? Regards Graham Fitch Chartered Civil and Structural Engineer
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