Hyddyn

Hydrodynamic Pressure Calculator for Bridge Piers

This calculator computes hydrodynamic pressure and forces on bridge piers under seismic conditions, based on pseudo-static methods from codes like IRC:SP:114-2018 and IS 1893. It covers various pier shapes and provides detailed step-by-step calculations. Assumptions: Water specific weight γ_w = 10 kN/m³ (adjustable), g ≈ 10 m/s². For non-circular shapes, an equivalent enveloping cylinder radius is used, with shape-adjusted coefficients.

Pier Shape: Circular Square Rectangular Elliptical

Diameter (m):

Side Length (m):

Length (m, along flow): Width (m, perpendicular to flow):

Major Axis (m): Minor Axis (m):

Submerged Height H (m): Horizontal Seismic Coefficient a_h (e.g., 0.1 for Zone III): Water Specific Weight γ_w (kN/m³): Calculation Method: Pseudo-Static (Total Force) Westergaard Pressure Distribution Added Mass for Dynamic Analysis