Owing to the existing warpingtorsion, it has been rather difficult to make a theoretical and experimental study of the prestressed concrete I -beams under combined mixed torsion. flexure and shear.
弯、剪、扭复合作用下的予应力工字梁，由于翘扭变形的存在，使得对它进行理论研究和实验研究非常困难。
3
It is shown that, when the effect of warping on rotation Angle is neglected, tension (or compression) is only coupled with horizontal bending and vertical bending instead of constrained torsion.