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A Doubt on the Design of Steel structure

 
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thirumalaichettiar
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PostPosted: Mon May 11, 2020 3:10 pm    Post subject: A Doubt on the Design of Steel structure Reply with quote

Design of Steel frame:

The calsue  3.9.2  of IS 800-2007 states

When the walls, or walls and floors and/or roofs are capable of effectively transmitting all the horizontal forces directly to the foundations, the structural steel framework may be designed without considering the effect of wind or earthquake.

Can any one explain when Design of steel frame  satisfying the above case will be found in practice?

T.RangaRajan.
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thirumalaichettiar
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PostPosted: Tue May 12, 2020 4:13 am    Post subject: Reply with quote

The clause 4.5.4 Second-Order Elastic Analysis of IS 800-2007
states

that Any second-order effects of the loads acting on the structure in its deformed configuration may be neglected, provided the following are satisfied:

(a).... & (b).....

Is there any text book with an example  of the second order

analysis based on the above assumptions?

Or satisfying the above conditions?


T.RangaRajan.







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Rudra Nevatia
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PostPosted: Tue May 12, 2020 2:30 pm    Post subject: A Doubt on the Design of Steel structure Reply with quote

Profiled sheets on roof and sides can be designed for diaphragm action to resist lateral loads. Please be aware that steel framework participates in diaphragm action and axial forces so induced must be combined with gravity actions.

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Rudra Nevatia

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N. Prabhakar
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PostPosted: Fri May 15, 2020 7:09 am    Post subject: Reply with quote

Dear Sefians,

Many doubts on the design of structural steel elements as per IS: 800 -2007 are well covered in the Excel Spreadsheets for STeelDesign software developed by me.  Files of PowerPoint presentation on my spreadsheets are attached herewith for your information.  For more details, please visit my website:  www.steeldesignspreadsheets.com.

I trust you will find the above information useful.

With best wishes,

N. Prabhakar, BE CEng(I) MIStructE (UK) MIE (Ind)
Chartered Structural Engineer
Vasai (E), Pin 401 208

Mobile: 9322199254



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