// Seismic Design Calculation (IS 1893: 2016 - Simplified) Seismic_Zone (Z) = 0.36; // Zone V Importance_Factor (I) = 1.2; // Critical Structure Response_Reduction (R) = 5.0; // SMRF Structure // Design Horizontal Seismic Coefficient (Ah) Ah = (Z / 2) * (I / R) * (Sa / g); // Base Shear (VB) VB = Ah * W; // W = Total seismic weight of the structure // Natural Period (T) T = 0.09 * (H / sqrt(d)); // H = Height, d = Base Dimension // Final Check: Storey Shear must be less than Capacity // Shear_Wall_Area > 0.4 * Building_Area