Ihave modulus of subgrade rection as 500KN/SQM/M, And in the same structure i have to add vertical spring in some supports in stead of modulus of subgrade reaction, how can i get spring constant equivalent to that subgrade reaction ?
You need to multiply the subgrade modulus value by the tributary area of the node to get the spring stiffness value for that node.
Hi
in my model the subgrade reaction is calculated like follows,
** SBC 30T/M3 = 300 kN/m3** ALLOWABLE DEFLECTION IS 15mm*** SUBGRADE MODULUS = 20000 kN/m2
and the plate mesh i have created is 0.5mx0.5m. so in this case do i need to change the subgrade value to this 20000/(0.5*0.5) = 80000kN/m2 ?
can you clear this doubt? thanks in advance.