![]() If you know the vertical stiffness of the pad, you can use a similar method to determine the modified area (A*) of this beam. Use a circular section when using this element because the pad has equal stiffness for longitudinal and transverse movement. I* is the unknown modified moment of inertia of your special bearing element (in^4)īy substitution you can solve for the modified moment of inertia for your element as. Where Ec is the modulus of elasticity of concrete (psi) Using a vertically oriented beam element fixed at one end and pinned at the other the force required to produce a unit displacement is. H is the height of the elastomer without shims (in) The force to displace an elastomeric pad one unit is.
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