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adil1070 SEFI Member

Joined: 26 Jan 2003 Posts: 4
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Posted: Mon Nov 06, 2006 6:58 am Post subject: Natural Time Period of the RCC Structure with brick walls |
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Dear Murtuza Kapasi You can calculate the time period of a building having infills using STAAD , if you model your building with diagonal ties in the respective direction of earthquake. Assign stiffenes to the ties on the basis of brick walls. Adil Ahmad
--- mtksnl[AT]lte... wrote:
Quote: | Respected Experts and Dear Sefians,
Help Regarding :
Please suggests a programme, macro or software to Calculate Natural Time Period of the RCC Structure with bricks walls / With out bricks.
Brief :
Recently I came across a RCC building for which I had two (2) very different natural time periods. The building is brick filled in one direction and not brick filled in another.
(1) Ta 1; Calculated by STAAD Pro, which is vary High (2) Ta 2; Calculated by Formula given in IS 1893, which is very law
I.E Ta = 0.09h/sqrt(d) For Building with Brickpanels in respective Direction and Ta = 0.075 x h ^0.75 For Building without brick panels.
As IS mathod is imperial and STAAD does not consider brick wall stifness non of this is perfectly alright. Now to avoid any approximation, I wish to find out accurate Natural Time period of this structure by any of analytical meathods. Greater accuracy is required as small change in the Time period (Ta) can have significant impact on Design and Cost of Building.
If you have any programme, macro or you can suggests any software to Calculate Natural Time Period of the RCC Structure with bricks walls / With out bricks please suggests.
Regards,
Murtuza Kapasi
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