COLOMBIAN SEISMIC VERIFICATION EXAMPLE

PROBLEM: Calculation of the design base shear from Rayleigh time period and to verify proper distribution of load to all the different joints in the structure. The structure modelled in STAAD is shown below:

There are 15 nodes on each floor level. Each node has been given a seismic load of 10 kip along positive Global Y direction. Load Factor is 1.2.

SOLUTION:

Total Seismic Load

INPUT PARAMETERS:

AA = 0.2, AV = 0.15, FA = 0.85, FV = 1.01, I = 1.12.

Approximate Time Period,

Where,

HTOP = 5 ft. = 1.524 m; Ct = 0.072,

ALPHA = 0.8 (From Tab. A.4.2-1 of Reglamento_Colombiano_Sismo_Resistente_NSR-10)