1.In bridge widening projects, the method of stitching is normally employed for connecting existing deck to the new deck. What are the problems associated with this method in terms of shrinkage of concrete?
2.An element of material subjected to to plane strain has a strain epsilon -x of 280x10^-6, a strain epsilon-y of 420x10^-6 and an engineering shear strain gamma-xy of 150x10^-6. Calculate the strains for the case where the coordinate axes are rotated by an angle of 35 degrees.