Base Shear Calculation

Seismic Base Shear Calculation Report

Equivalent Static Analysis • Reference Code Parameters: IS 1893 / NBC 105

1. DESIGN INPUT CONFIGURATIONS

Seismic Zone Factor (Z) Zone V / Very High Seismicity (Z = 0.36) Zone IV / High Seismicity (Z = 0.24) Zone III / Moderate Seismicity (Z = 0.16) Zone II / Low Seismicity (Z = 0.10)

Importance Factor (I) Critical Infrastructure / Public (I = 1.5) Commercial / Residential Multi-Storey (I = 1.2) Standard Routine Buildings (I = 1.0)

Response Reduction Factor (R) SMRF - Special Moment Frame (R = 5.0) OMRF - Ordinary Moment Frame (R = 3.0)

Foundation Soil Classification Type I - Rock or Hard Soil Profile Type II - Medium / Stiff Soil Profile Type III - Soft Foundation Layers

Total Height (h)

M

Seismic Weight (W)

KN

2. Evaluation Parameters

Time Period (T_a)

--

0.075×h^0.75

Spectral (S_a/g)

--

Soil Curve Factor

Coeff. (A_h)

--

(Z/2)·(I/R)·(S_a/g)

Height vs. Base Shear Base Curve

Design Ultimate Base Shear Force (V_b)

--

Formula: V_b = A_h × W •

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