In this exercise, you will learn how to create a seismic load definition which will instruct STAAD.Pro to calculate the seismic loads according to the IS 1893 (Part 1): 2016. To assist STAAD in calculating the appropriate seismic loads, we will define the following parameters:

Include Accidental Load: This parameter prepares STAAD.Pro to calculate and apply torsional loads to account for code-specified accidental eccentricity. For this Workshop we will not be considering this.

Zone Factor: Zone V (STAAD.Pro is also able to look up the Latitude and Longitude and determine the Mapped Spectral Response Accelerations for Short Periods (Ss) and the Mapped Spectral Response Accelerations for 1-Second Period (S1)).

Importance Factor: 1.5 (Important Buildings) Enter the occupancy importance factor.

Response Modification Factor: 5 (Steel Buildings with Special Moment Resisting Frames); response modification factor for lateral loading in each direction.

Other Parameters: Soil Type – Medium Soil; Structure Type: Steel MRF Buildings; Damping Ratio: 5%; Foundation Depth: 5metres (or provide Ground Level: 0.5metres); Period in x: 0.5secs’ Period in Z: 0.5secs

1. Continue with the model from the previous exercise.

2. In the Node Specification dialog, Create Rigid Floor Diaphragm at 4.5m, 7.5m, 10.5m respectively, and then click on the Add... button.

3. Keep the Add New: Seismic Definitions dialog open for the next exercise

QUIZ

1. What parameter allows STAAD.Pro to calculate and apply torsional loads to allow for code-specific accidental eccentricity?

(A) Importance Factor

(B) Zone Factor

(D) Include Accidental Load

2. In order to create the Rigid Floor Diaphragm in what dialog box is the appropriate tool located?

(A) Properties

(B) Node Specification

(D) Add Support