The warp and stress transmission in the joint of an open thin wall beam

The regularities of the warp in the sections of an open thin-wall beam have been discussed using the MODERN ENGINEERING THEORY OF BEAM. Thus, the transmission relationship between the warp displacements and the double-moments in the joints of open thin-wall beams which are connected in different ways has been deduced. Meanwhile, experiments conducted by the author and some conclusions reached from these experiments as well as the tentative idea for further perfection are briefly presented here.Communicated by Chou Li.