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根据非线性有限元法的分析和试验结果,本文研究了连续深梁的受力特性和破坏机理,并指出连续深梁的支座反力随跨高比的不同而变化;梁的最大弯矩发生在跨中而不是在中间支座;中间支座截面受拉区的位置随着跨高比的减小而下移;当跨高比小于或等于1.0时跨中有时不出现反弯点等现象,按作者所进行的24根连续深梁的试验资料,提出了抗弯强度与抗剪强度的计算式和构造要求,并以有限元法计算了各类连续深粱的影响线,供设计者配套使用。
According to the analysis and experimental results of nonlinear finite element method, this paper studies the stress characteristics and failure mechanism of continuous deep beams, and points out that the bearing reaction force of continuous deep beams varies with the ratio of span height to height; the maximum bending moment of beams Occurs in the midspan but not in the middle bearing; the position of the cross section of the middle bearing is reduced as the ratio of the height to the height decreases; when the ratio of the height to the height is less than or equal to 1.0, the point of inflection or the like sometimes does not occur in the midspan. According to the experimental data of 24 continuous deep beams conducted by the author, the calculation formulas and construction requirements for bending strength and shear strength were proposed, and the influence lines of various types of continuous deep radon were calculated using the finite element method for design. Supporting use.