Problem No$3.(6$ pts $)$

Solve only for displacements at each node for this frame using the ridM. Show hio corresponding analylical and numerical expressions of the two element :tiffiess matrices of the reduced general stiffness matrix and load vector. Each $2-1$oded isoparametric heam element has one node at each end, and each nede has $3$ DOF if there is ne estriction.

Characteristics of the IPN section $h=180mm,b=82mm,c_a=6.mm,c_s=10\mathrm{.}4mm{}_j=8,i{\mathrm{.}10}^{\text{'}\text{'}}Pa.E=2,{1\mathrm{.}10}^{\text{'}\text{'}}Pa.P=4kN.,||=30.M=10kN.m$

rigure $3$:

"Gool is Lome"