Arun,

You should have put this information in your previous post, so the whole discussion could be followed in a single thread.

From the CAESAR II Help:

Short Explanation
Scalar - signed combination disp./force/stress level
ABS - unsigned combination disp./force/stress level


Detailed Explanation
Scalar - Combine the displacement vectors, the force vectors,
and the stress scalars.

Displacements are the algebraic combination of the
displacement vectors.

Forces are the algebraic combination of the force vectors.

Stresses are the scalar combination of the stress scalars.

The Displacements and Forces of an ALG case and Scalar case
are equivalent. There may be variation at the stress level,
since in an ALG combination the stresses are calculated and
in a Scalar combination the are combined. For example:
Load Case 1: Bending stress = 100 psi, due to X-moment
Load Case 2: Bending stress = 100 psi, due to Z-moment
Algebraic (vectorial) sum = sqrt(100*100 + 100*100) = 144 psi
Scalar sum = 100 + 100 = 200 psi

Scalar would typically be used to sum (SUS + OCC) code
stresses.

ABS - Combine the ABSolute value of the displacements, the
ABSolute value of the forces, and the ABSolute value
of the stresses.

Displacements are the sum of the absolute value of the
displacements of all cases included in the combination.

Forces are the sum of the absolute value of the
forces of all cases included in the combination.

Stresses are the sum of the absolute value of the
stresses of all cases included in the combination.


So, what you're seeing makes perfect sense.