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N o n l i n e a r A n a l y s i s A C I S t r u c t u r a l J o u r n a l 1 9 9 0 v o l 8 7C i v i l E n g i n e e r i n g F o r u m / C i v i l E n g i n e e r i n g D i s c u s s i o n /

P r o b l e m s / earthquake des ign in STAAD PROe a r t h q u a k e d e s i g n i n S T A A D P R Oe a r t h q u a k e d e s i g n i n S T A A D P R O

Can any body give me detail How to earthquake design of rcc building structure inSTAADPRO 7.e a r t h q u a k e d e s i g n i n S T A A DP R Oh t t p : / / f o r u m . c i v i l e a . c o m / s h ow t h r e a d . p h p ? t i d = 8 2 2 1

Can any body give me detail How to earthquake design of rcc building structureinSTAADPRO Provide all beam and column junctions as hinged and create a loadcase [i.e. DL+50%LL or 25%LL as per Code]Then run analysis and view the resultw.r.t the already created load case.Go to reaction tab and copy the reactions tothe excelsheetDelete the all the unwanted columns [ Fx, Fz, Mx, My]Let nodes,loadcase and Fy column retainedReplace the loadcase column fully by Joint

weightCopy and paste it in thestaadeditorDone

e a r t h q u a k e d e s i g n i n S T A A D PROThe images below shows the actual way the model will look whenrunning the joint weight.The second image is showing the model only.So as engr1900 said, you have to runthe joint weight with live load as some ratio as per your design and the code. Youcan see that the third image explains that.The 3rd load case is the live load.The 4th image is the syntax for to use forthe earthquake as per India code.

After all these the combination that is to be used for analysis of the earthquake islisted below.e a r t h q u a k e d e s i g n i n S T A A DP R O h t t p : / / f o r u m . c i v i l e a . c o m

/ s h o w t h r e a d . p h p ?t i d = 8 2 2 1 & h i g h l i g h t = s t a a d 2,

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e a r t h q u a k e d e s i g n i n S T A A DP R O h t t p : / / f o r u m . c i v i l e a . c o m

/ s h o w t h r e a d . p h p ?t i d = 8 2 2 1 & h i g h l i g h t = s t a a d 3,

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LOAD 1 SEISMIC ALONG X DIRECTION1893 LOAD X 1LOAD 2 SEISMIC ALONG -X DIRECTION1893 LOAD X -1LOAD 3 SEISMIC ALONG Z DIRECTION

1893 LOAD Z 1LOAD 4 SEISMIC ALONG -Z DIRECTION1893 LOAD Z -1LOAD 5 SELF WEIGHTSELFWEIGHT Y -1Load case 6 is dead loadload case 7 is earth pressure and surcharge loadload case 8 is live loadLOAD COMB 9 WORKING LOAD (DL+LL)5 1.0 6 1.0 8 1.0LOAD COMB 10 FACTORED LOAD (DL+LL)5 1.5 6 1.5 8 1.5LOAD COMB 11 WORKING LOAD (DL+LL+EP)5 1.0 6 1.0 7 1.0 8 1.0LOAD COMB 12 FACTORED LOAD (DL+LL+EP)5 1.5 6 1.5 7 1.5 8 1.5****SEISMIC WITH (DL+LL+EP)**** ALONG +X DIRECTION ****LOAD COMB 13 COMB1 SEISMIC (1.2 EQ + 1.2 D.L +1.2 E.P+ 1.2 L.L)1 1.2 5 1.2 6 1.2 7 1.2 8 1.2LOAD COMB 14 COMB2 SEISMIC (1.5 EQ + 1.5 D.L+1.5 E.P)1 1.5 5 1.5 6 1.5 7 1.5

LOAD COMB 15 COMB3 SEISMIC (1.5 EQ + 0.9 D.L+0.9 E.P)1 1.5 5 0.9 6 0.9 7 0.9**** ALONG -X DIRECTION **********LOAD COMB 16 COMB1 SEISMIC (1.2 EQ + 1.2 D.L +1.2 E.P+ 1.2 L.L)2 1.2 5 1.2 6 1.2 7 1.2 8 1.2LOAD COMB 17 COMB2 SEISMIC (1.5 EQ + 1.5 D.L+1.5 E.P)2 1.5 5 1.5 6 1.5 7 1.5LOAD COMB 18 COMB3 SEISMIC (1.5 EQ + 0.9 D.L+0.9 E.P)2 1.5 5 0.9 6 0.9 7 0.9****** ALONG +Z DIRECTION *****LOAD COMB 19 COMB1 SEISMIC (1.2 EQ + 1.2 D.L + 1.2 E.P+1.2 L.L)3 1.2 5 1.2 6 1.2 7 1.2 8 1.2LOAD COMB 20 COMB2 SEISMIC (1.5 EQ + 1.5 D.L+ 1.5 E.P)3 1.5 5 1.5 6 1.5 7 1.5LOAD COMB 21 COMB3 SEISMIC (1.5 EQ + 0.9 D.L+ 0.9 E.P)3 1.5 5 0.9 6 0.9 7 0.9

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***** ALONG -Z DIRECTION *******LOAD COMB 22 COMB1 SEISMIC (1.2 EQ + 1.2 D.L + 1.2 E.P + 1.2 L.L)4 1.2 5 1.2 6 1.2 7 1.2 8 1.2LOAD COMB 23 COMB2 SEISMIC (1.5 EQ + 1.5 D.L +1.5 E.P)

4 1.5 5 1.5 6 1.5 7 1.5LOAD COMB 24 COMB3 SEISMIC (1.5 EQ + 0.9 D.L+0.9 E.P)4 1.5 5 0.9 6 0.9 7 0.9*** STOREY DRIFT LIMITATION ***************** ALONG +X DIRECTION **********LOAD COMB 25 COMB1 SEISMIC (1.0 EQ + 1.0 D.L + 1.0 E.P + 1.0 L.L)1 1.0 5 1.0 6 1.0 7 1.0 8 1.0LOAD COMB 26 COMB2 SEISMIC (1.0 EQ + 1.0 D.L+1.0 E.P)1 1.0 5 1.0 6 1.0 7 1.0**** ALONG -X DIRECTION ********LOAD COMB 27 COMB1 SEISMIC (1.0 EQ + 1.0 D.L +1.0 E.P+ 1.0 L.L)2 1.0 5 1.0 6 1.0 7 1.0 8 1.0LOAD COMB 28 COMB2 SEISMIC (1.0 EQ + 1.0 D.L+1.0 E.P)2 1.0 5 1.0 6 1.0 7 1.0***** ALONG +Z DIRECTION ********LOAD COMB 29 COMB1 SEISMIC (1.0 EQ + 1.0 D.L + 1.0 E.P +1.0 L.L)3 1.0 5 1.0 6 1.0 7 1.0 8 1.0LOAD COMB 30 COMB2 SEISMIC (1.0 EQ + 1.0 D.L+1.0 E.P)3 1.0 5 1.0 6 1.0 7 1.0****** ALONG -Z DIRECTION ******LOAD COMB 31 COMB1 SEISMIC (1.0 EQ + 1.0 D.L + 1.0 E.P + 1.0 L.L)

4 1.0 5 1.0 6 1.0 7 1.0 8 1.0LOAD COMB 32 COMB2 SEISMIC (1.0 EQ + 1.0 D.L+1.0 E.P)4 1.0 5 1.0 6 1.0 7 1.0*****SEISMIC WITH (DL+LL) ONLY ****** ALONG +X DIRECTION *******LOAD COMB 33 COMB1 SEISMIC (1.2 EQ + 1.2 D.L + 1.2 L.L)1 1.2 5 1.2 6 1.2 8 1.2LOAD COMB 34 COMB2 SEISMIC (1.5 EQ + 1.5 D.L)1 1.5 5 1.5 6 1.5

LOAD COMB 35 COMB3 SEISMIC (1.5 EQ + 0.9 D.L)

1 1.5 5 0.9 6 0.9***** ALONG -X DIRECTION *******LOAD COMB 36 SEISMIC (1.2 EQ + 1.2 D.L + 1.2 L.L)2 1.2 5 1.2 6 1.2 8 1.2LOAD COMB 37 COMB2 SEISMIC (1.5 EQ + 1.5 D.L)2 1.5 5 1.5 6 1.5LOAD COMB 38 COMB3 SEISMIC (1.5 EQ + 0.9 D.L)2 1.5 5 0.9 6 0.9

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********* ALONG +Z DIRECTION **********LOAD COMB 39 COMB1 SEISMIC (1.2 EQ + 1.2 D.L + 1.2 L.L)3 1.2 5 1.2 6 1.2 8 1.2LOAD COMB 40 COMB2 SEISMIC (1.5 EQ + 1.5 D.L)3 1.5 5 1.5 6 1.5

LOAD COMB 41 COMB3 SEISMIC (1.5 EQ + 0.9 D.L)3 1.5 5 0.9 6 0.9***** ALONG -Z DIRECTION *******LOAD COMB 42 COMB1 SEISMIC (1.2 EQ + 1.2 D.L + 1.2 L.L)4 1.2 5 1.2 6 1.2 8 1.2LOAD COMB 43 COMB2 SEISMIC (1.5 EQ + 1.5 D.L)4 1.5 5 1.5 6 1.5LOAD COMB 44 COMB3 SEISMIC (1.5 EQ + 0.9 D.L)4 1.5 5 0.9 6 0.9****** STOREY DRIFT LIMITATION ***************** ALONG +X DIRECTION *******LOAD COMB 45 COMB1 SEISMIC (1.0 EQ + 1.0 D.L + 1.0 L.L)1 1.0 5 1.0 6 1.0 8 1.0LOAD COMB 46 COMB2 SEISMIC (1.0 EQ + 1.0 D.L)1 1.0 5 1.0 6 1.0****** ALONG -X DIRECTION *******LOAD COMB 47 COMB1 SEISMIC (1.0 EQ + 1.0 D.L + 1.0 L.L)2 1.0 5 1.0 6 1.0 8 1.0LOAD COMB 48 COMB2 SEISMIC (1.0 EQ + 1.0 D.L)2 1.0 5 1.0 6 1.0**** ALONG +Z DIRECTION ********LOAD COMB 49 COMB1 SEISMIC (1.0 EQ + 1.0 D.L + 1.0 L.L)

3 1.0 5 1.0 6 1.0 8 1.0LOAD COMB 50 COMB2 SEISMIC (1.0 EQ + 1.0 D.L)3 1.0 51.0 6 1.0**** ALONG -Z DIRECTION ********LOAD COMB 51 COMB1 SEISMIC (1.0 EQ + 1.0 D.L + 1.0 L.L)4 1.0 5 1.0 6 1.0 8 1.0LOAD COMB 52 COMB2 SEISMIC (1.0 EQ + 1.0 D.L)4 1.0 5 1.0 6 1.0PERFORM ANALYSIS

e a r t h q u a k e d e s i g n i n S T A A DP R O h t t p : / / f o r u m . c i v i l e a . c o m

/ s h o w t h r e a d . p h p ?t i d = 8 2 2 1 & h i g h l i g h t = s t a a d 4,

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R E : e a r t h q u a k e d e s i g n i nS T A A D PROThis procedure is very useful in the older version ofStaaddue to the fact that in

the OLDER version, load list in load cases differfrom the load list in loaddefinition.In the latter version ofStaad, you can just copy paste the loads fromthe load cases to the seismic definition and letStaaddo the entire process ofanalysing weights but of course there is a need to carefully change some loadname, e.g. instead of floor loadthat will be floor weights etc. It's much easier.e a r t h q u a k e d e s i g n i n S T A A DP R O h t t p : / / f o r u m . c i v i l e a . c o m

/ s h o w t h r e a d . p h p ?t i d = 8 2 2 1 & h i g h l i g h t = s t a a d 5,

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