Essentials in the theory of framed structures . s are hori-zontal, the vertical component of the stress in DJ must balancethe vertical magnitudes on either side of the section. Theresultant of the vertical forces on the left of the section is50 - (15 4- 8) = 27 tons acting upward. The left-handportion will move upward, unless the vertical component ofDJ is 27 tons acting downward from D or away from thejoint. Therefore the member is in tension and the verticalcomponent of the stress is 27 tons. Sec. I APPLICATION OF PRINCIPLES OF EQUILIBRIUM 71 Compute the stresses in DE and HJ and see if thes
Essentials in the theory of framed structures . s are hori-zontal, the vertical component of the stress in DJ must balancethe vertical magnitudes on either side of the section. Theresultant of the vertical forces on the left of the section is50 - (15 4- 8) = 27 tons acting upward. The left-handportion will move upward, unless the vertical component ofDJ is 27 tons acting downward from D or away from thejoint. Therefore the member is in tension and the verticalcomponent of the stress is 27 tons. Sec. I APPLICATION OF PRINCIPLES OF EQUILIBRIUM 71 Compute the stresses in DE and HJ and see if these stressesbalance with the horizontal component of DJ. Compute the stresses in BC, BG, CG and DH and then draw astress diagram to check the computations. It is worthy of note that a solution by the method of sectionsis entirely independent of the number, inclination or arrange-ment of any members of the structure other than those cut bythe section. 46. Problems. I. The truss in Fig. 43 is supported by vertical reactions at each end. Deter- 400. %. -5Eijual5paces=l- PlG. 43.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectstructu, bookyear1922
