Understanding the concepts on Degrees of Freedom

• Step 1 : Calculation of Mn

Hence,

Mn1 = 3.86m

Mn2 = 3.86m

Mn3 = 3.86m

Mn4 = 3.86m

Mn5 = 3.86m

• Step 2 : Calculation of Ln 

Hence,

Ln1 = 4.121m

Ln2 = -1.29m

Ln3 = 0.68m

Ln4 = 0.381m

Ln5 = 0.175m

• Step 3 : Calculation of Mn*

Hence,

Mn*1 = 4.398m

Mn*2 = 0.432m

Mn*3 = 0.119m

Mn*4 = 0.357m

Mn*5 = 0.0079m

• Step 4 : Calculation of |n

•           Step 5 : Calculation of Base Shear 

As a result, 

Vb = 1.27