【摘要】 本文探讨了筒体结构在水平集中力的作用下,在翼缘框架中所引起的剪力滞后效应的问题。首先,本文根据连续化原理,将密柱深梁的框筒等效连续化为由正交各向异性板和角柱围成的等效实腹筒,建立筒体结构的等效连续化力学模型;然后根据基本假定导出筒体结构在受弯时的哈密顿对偶体系,假定翼缘框架翘曲位移沿板宽方向呈二次曲线分布,而不考虑腹板的剪力滞后效应,其位移曲线为直线;其次,编制有效的MATLAB程序,应用精细积分法计算结构受弯时的数值解;最后,结合材料力学公式,求出结构的各项内力与位移,并证明本文方法的可行性。更多还原

【Abstract】 In this paper, the shear lag effect caused by the horizontal concentrated force in the flange frame of a cylindrical structure is discussed. First, according to the principle of continuum, the equivalent cylinder continuum mechanics model of the thick cylindrical column is equivalent continuous into the equivalent solid belly tube surrounded by orthotropic plates and corner columns. The equivalent continuum mechanics model of the cylinder structure is established. Then, according to the basic assumption, the duality system of the cylinder structure in bending is derived. It is assumed that the warpage displacement of the flange frame has a two degree curve distribution along the slab width, and not that of the cylinder. Considering the shear lag effect of web, its displacement curve is straight line; secondly,an effective MATLAB program is compiled to calculate the numerical solution of the structure under bending by the precise integration method; finally, the internal forces and displacements of the structure are obtained by combining the material mechanics formula, and the feasibility of this method is proved.更多还原