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Re: Analysis Standards - Nomenclature?[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaoc(--nospam--at)seaoc.org
- Subject: Re: Analysis Standards - Nomenclature?
- From: <BRBATES(--nospam--at)aol.com>
- Date: Sat, 27 Jun 1998 17:55:04 EDT
<< << Bruce, in RISA3D , can we model a simple or very complicated wood framed <<house in 3D? Hey, RISA-3D can do anything! ;-) << For example: << << 1. Plywood shtg is a horiz plate where we apply uniform vertical DL and LL << and horizontal wind load << 2. The plates distribute the loads to rafters, joists and studs. << 3. The reactions from rafters, joist and studs are transfered to << headers,beams, and girders. << 4. The reactions from headers, beams and girders goes to posts/columns, dbl << studs, trimmers, etc. << 5. The reactions from posts etc. and walls becomes oint and uniform load to << design the lower level joists, beams, etc << In other words, if each and every member of a wood framed house is inputed as <<structural members on RISA3D and we apply uniform vertical and horizontal <<loads on the plywood roof and floor and wind load on wall shtg(seismic loads <<can be applied as a percentage of the DL applied horizontally), will all loads <<or combination of loads be applied to appropriate structural members? Yes, this would work in RISA-3D (as well as in a number of other programs). << Can we simplify the series of joist or studs as a single member to save on <<inputing time? (we only input a single joist or stud at the critical span) Yes, and I would highly recommend this if you aren't actually sizing the components of the joist itself, etc. << Can we get the size of any member we choose? (not all since we dont need <<calcs for all rafters/jsts, beams, studs and column but only the critical ones). << Can we get printout of calcs for selected members only showing span, loads, << end reactions, bending moments, etc.? Yes you can do all this. << Maybe, the other expensive programs used for big steel buildings can do all or << most of these analyses right now but small offices doing wood framed houses << for small fees cannot afford them. << Ernie Natividad RISA-3D, as well as SAP2000, StaadIII, ROBOT, etc. is a general purpose program that can handle everything you've described, though if you are ONLY going to be doing wood structures, you should probably take a look at some of the wood-specific programs as well, such as WoodWorks, QLAT, etc. (I'm not really that familiar with them so I can't offer an opinion as to their usability. Bruce Bates RISA Technologies
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