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为了满足设计和施工的需要,减少绘制桁架影响线的计算工作量,本文对于任意外形简单腹系的简支梁式桁架影响线的绘制,提出一种简便适用的方法——“数列公式法”。数列公式法是将桁架看成理想桁架,由左端至右端按数列排列的x个计算节间所组成,用截面法推导的并含有一个未知数的方程,计算影响线的拐点纵标距,用以绘制桁架影响线的方法。该法计算简捷,有广泛的适用性,可随
In order to meet the needs of design and construction and reduce the computational burden of drawing truss influence lines, this paper proposes a simple and applicable method for drawing the influence lines of simply supported beam trusses with arbitrary shape and simple abdominal system—“numerical formula method”. . The series formula method is to consider the truss as an ideal truss, which is composed of x calculation sections arranged from the left end to the right end in a series. The equation derived from the section method and containing an unknown number is used to calculate the inflection point of the influence line. Draw a truss influence line. The method is simple and has a wide range of applicability.