Answer Happy

There is a 4-story building destined for Housing, designed for acity with a regular framed structural system and with a mezzanineheight of 3m. Perform a dynamic spectral analysis, considering avery stiff ground and the seismic weights given by:
Compressive strength of concrete f'c = 2100 T/m^2
Modulus of elasticity of concrete. Ec = 2173706 T/m^2
Poisson's ratio of concrete.c = 0,2
Thickness lightened roof slab = e = 20 cm (floors 1 and 2)e =17 cm (floor 3 and 4)
Cross beams (horizontal axis of the plane) = 40cm x 50cm
Longitudinal beams (vertical axis of the plane).= 50cm x50cm.
Weights for seismic analysis =
Level1= 176Tn
Level2= 853 Tn
Level3= 538 Tn
Level4 = 385 Tn
Isolated footings of dimensions 1,3m x 1,2m x 0,4m
Rooting depth = 1m
Soil Type = Granular
Soil Poisson's ratio = 0,30
1.Calculate accidental eccentricity, mezzanine level masses andscale factor.
2.Determine the first 12 periods of vibration.
50cm 40cm 5m 5m 5m 4m 4m 4m 4m