Define General Spring Type
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Define the values of general spring support with 6x6 coupled matrix for stiffness, damping and mass. |
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From the Main Menu select Boundary > Spring Supports > Define General Spring Type. |
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Name Input Method Stiffness Matrix Mass Matrix: Check on to enter the mass matrix. Damping Matrix: Check on to enter the damping matrix. Coupled Spring Stiffness SDx-SDx SDx-SDy SRz-SRz Note In typical building structures, analysis models do not include the pile footings. Instead, boundary springs are assumed to exist at the bottom of foundation or at the pile caps. The following general stiffness offers true stiffness of pile elements. For batter piles, use Node's local Axis to calculate the stiffness in the skewed directions.
Composition of general spring stiffness * Assumptions Modulus of elasticity: E Section's moments of inertia: Iy, Iz Cross sectional area: A Length: L (Shear deformation not considered) |
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