Matrix Methods

The stiffness coefficient $${k_{ij}}$$ indicates

For linear elastic frame, if stiffness matrix is doubled with respect to the existing stiffness matrix, the deflection of the resulting frame will be

The stiffness matrix of a beam element is given as $${{2EI} \over L}\left[ {\matrix{ 2 & { + 1} \cr { + 1} & 2 \cr } } \right].$$ Then the flexibility matrix is

The order for the flexibility matrix for a structure is,

Which of the following statements is true with regard to the flexibility method of analysis.

Flexibility of a structure may be defined as the displacement caused by ----------------- force and stiffness of a structure may be defined as the force required for ----------------- displacement

In flexibility method the unknown quantities are ----------------- whereas in stiffness method the unknown quantities are --------------

In a linear elastic structural element

In a linear elastic structural element