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近年来有不少文献提出了关于两梯段折板式悬挑楼梯(结构对称,受对称荷载的情况)的计算方法,如文献[1]、[2]、[3]等等,但所解决的问题都有一定的局限性。本文提出了用力法解算悬梯平面转角为任意角度时的计算方法,并具有下列特点:(1) 在计算力法方程中的系数和自由项时有选择地保留了影响较大的各项。这样既使计算达到一定的精度,又使计算得到简化;(2) 用扇形面代替折角形休息平台,这样的计算简图更接近于实际情况;(3) 考虑了平台荷载的偏心。
In recent years, a number of literatures have proposed calculation methods for two-step folding plate overhanging stairs (symmetry of the structure and symmetric loads), such as literature [1], [2], [3], etc. The problems have certain limitations. This paper proposes a method for calculating the plane angle of a ladder with arbitrary angles by using the force method, and has the following characteristics: (1) Selectively retains the most influential items when calculating coefficients and free terms in force equations. . This not only allows the calculation to reach a certain accuracy, but also simplifies the calculation; (2) replaces the hinge-shaped resting platform with a fan-shaped surface, such a calculation diagram is closer to the actual situation; (3) considers the eccentricity of the platform load.