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位移分配法分析单层工业厂房是以切断横梁的轴力连系而成静定的基本体系,在荷载作用下,各横梁切口产生错近或远离的“不协调位移”。为了符合原结构在各切口处相对位移为零的条件,作了分配与传递等运算,使切口处的“不协调位移”逐步调整趋近于零;这样,就可求出各柱的位移值,最后从位移而算出内力。本法的基本原理与计算程序与弯矩分配法相似。位移分配法除适用于单层工业厂房铰接排架,亦可适用于横梁刚度较大的刚接单层刚架,而对于屋顶(或横梁)为三角形、锯齿形或拱形等跨变铰接排架的分析,尤为简捷。文中附有算例。
Displacement distribution method analysis of single-story industrial plant is based on cutting off the axial force of the beam to form a statically determinate system. Under the action of the load, the incisions of each beam produce misaligned displacements that are close to or far from each other. In order to meet the condition that the relative displacement of the original structure is zero at each incision, operations such as distribution and transfer are made so that the “uncoordinated displacement” at the incision is gradually adjusted to zero; thus, the displacement value of each column can be obtained. Finally, the internal force is calculated from the displacement. The basic principles and calculation procedures of this law are similar to those of the moment distribution method. Displacement distribution method is applicable to single-story industrial plant articulated and bent frame, and can also be applied to rigidly connected single-layer rigid frame with large beam rigidity, and triangular, zigzag or arch-shaped cross-change hinged block for roof (or beam). The analysis of the shelves is particularly simple and straightforward. Examples are included in the text.