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基础梁由于混凝土受气温变化或收缩影响,常发生裂缝,使建筑物不能正常使用,因此,有必要计算产生裂缝的约束力。本文应用半空间体切向力作用于边界上的水平位移公式,计算单位切向力作用于矩形单元的水平位移ξ及其函数F。将梁分2n个等分单元,分段间隔为c,假定约束力在分段间隔c的长度内是均布的,采用结构力学混合法,利用梁和地基变形协调和力的平衡原理,建立联立方程式,求解温度变化或收缩引起未知约束力。为了简化计算,文后附有计算位移函数表。
Due to the effect of temperature change or shrinkage of concrete on foundation beams, cracks often occur and the building cannot be used normally. Therefore, it is necessary to calculate the binding force that generates cracks. In this paper, the horizontal displacement formula of the half-space body is applied to the boundary surface, and the unitary tangential force is applied to the horizontal displacement ξ of the rectangular element and its function F. The beam is divided into 2n equally divided cells with segmental intervals of c. Assume that the binding force is uniformly distributed within the length of the segmental interval c. The structural mechanics mixing method is used to establish the principle of balance between beam and foundation deformation and force balance. A simultaneous equation that solves for temperature changes or shrinkage causes unknown binding forces. To simplify the calculation, a table of calculated displacement functions is attached to the text.