Q. The most important tool in obtaining influence lines is:
Solution:
Muller Breslav?s principle may be stated as, the ordinate of influence lines for any stress element (such as axial stress, moment or reaction) of any structure are proportional to those of the deflection curve, which is obtained by removing the rest raint corresponding to that element from the structure and introducing in its place a unit deformation in to primary structure which remains.
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