as1170_4

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DISCLAIMER

This spreadsheet is provided in "as is" condition.

It may need modification for your jo and it may

contain errors. It is the responsii!ity of the user

to perform independent checs.

MICROSTRAN RESPONSE SPECTRUM ANALYSIS - AS1170.4

PROCEDURE:

1. Do dynamic analysis without RSA box checked.

. !ile " #ist$Edit !ile command% then choose Dynamic #o&.

'. !ind (undamental )e*iod (o* di*ection o( inte*est.

+. Do static analysis with em)ty load case (o* RSA *esults.

,. Re)eat dynamic analysis with-

a. RSA box checked.

. Check dynamic lo& (o* /0 mass )a*tici)ation.

2. Analyse " Res)onse S)ect*um then:

3n Dynamic #oad Case Scale !acto*s dialo&-

/. C*eate 3n)ut$Analysis *e)o*t and check base shea*

(o* ea*th4uake case.

Accele*ation coe((icient% a 5 0.10 67oba*t50.

7ei&ht% hn 5 1.0 m

E4. ,..619:

!undamental )e*iod 5 0., sec.

!*e4uency 619 5 '.2' 7;.

C619 5 0.'0,

E4. ,..69:

Pe*iod (o* the o*tho&onal di*ection 5 0.1 sec.!*e4uency 69 5 .2' 7;.

C69 5 0.'+

<inimum ea*th4uake desi&n coe((.% C 5 0.2,

St*uctu*e )e*iod% = 5 0.21 sec. 6!undame

3m)o*tance (acto*% 3 5 1 61.00 o* 1.

E4. ,..' 5 0.1

Ea*th4uake desi&n coe(( icient% C 5 0.2,

Site (acto*% S 5 0., 6Rock50.,

St*uctu*al *es)onse (acto*% R( 5 '.0 6<ason*y5

>*a?ity load% >& 5 +,, k8 6/.21 x su

Earth#uae ase shear force$ %&

% E4. ,.. 5 ',2 k8

% lowe* limit 5 +2 k8

% u))e* limit 5 21 k8

5 ',2 k8

Microstran Response Spectrum dia!o'&

Scale (acto* 5 0.'

Microstran Dynamic Load Case Sca!e (actors dia!o'&

Reaction 5 1,+ k8 6alue to b

Pe*centa&e o( Section , ho*i;. base shea* (o*ce 5 /0 63**e&ula*51

Re4ui*ed base shea* 5 ''1 k8

Scale !acto* 5 .00 6RSA ?alue

)ASE S*EAR

. Ente* the ?alues shown in *ed. Do not chan&e anythin& else.

b. >*een ?alue ente*ed in Res)onse S)ect*um dialo&.

@ t*ans(e* Reaction ?alue to blue ?alue below

@ t*ans(e* ma&enta ?alue below to Scale !acto*.

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=he <ic*ost*an 3n)ut$Analysis *e)o*t shows t*ue RSA

*eaction ?alues at each su))o*t and the sum o( these

?alues% which is an a))*oximation o( the RSA base

shea*. !o* an unsymmet*ical st*uctu*e the sum o( the

*eaction ?alues may exceed the RSA base shea* by

0 o* mo*e.

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+ to 8ewcastle50.119

tal )e*iod (*om dynamic analysis9

+9

to So(t clay5.09

.+ to <R!52.09

mass mat*ix dia&onal @ see dynamic lo&.9

scaled acco*din& to Cl. ...9

00% Re&ula*5/09

s will be (acto*ed by this ?alue9

7/23/2019 as1170_4


as1170_4

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