Etabs 2015 - Response Spectrum Analysis

Etabs 2015 advanced tutorial deals with the response spectrum analysis which is a method of seismic analysis considered for irregular or tall buildings.The tutorial is based on codal provisions listed according to ASCE 7- 05.Steps illustrated in the tutorial can be followed for other international earthquake codes.Following are explained in the tutorial:

(1) Defining load pattern 2:22

(2) Defining Mass Source 3:25

(3) Modal cases 3:49

(4) Response spectrum function 4:47

(5) Defining scale factor 7:07

(6) Modal participation mass ratio 10:16

(7) Scaling of response spectrum base shear 13:18

Tutorial starts with an introductory explanation about response spectrum analysis.The load patterns and mass source are defined according to ASCE 7-05. For detailed explanation on this part , beginners tutorial can be referred.In the following steps modal cases and response spectrum function are defined and while defining the load cases,the method of scaling the response spectrum function is explained.After the analysis, modal participation mass ratio check is conducted to make sure that the number of modes considered for the analysis is sufficient or not.In the response spectrum base shear check,the obtained response spectrum base shear is scaled up to 85 % of the static base shear for the dynamic analysis.

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