A frame is subjected to a load P as shown in the figure.

A frame is subjected to a load P as shown in the figure. The frame has a constant flexural rigidity EI. The effect of axial load is neglected. The deflection at point A due to the applied load P is

Strain energy (t) = ^L∫₀	M²_xdx	+ ^L∫₀	M²_ydx
	2EI		2EI

M_x = P_x M_yP_y

1	Pδ = ^L∫₀	(px)²dx	+ ^L∫₀	(px)²dx
2	Pδ = ^L∫₀	2EI	+ ^L∫₀	2EI

=	2	P²L²	=	1	P ×	4	PL³
=	3	EI	=	2	P ×	3	EI

δ =	4	PL³
	3	EI

1PL³
3EI

2PL³
3EI

PL⁴
EI

4PL³
3EI