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《桥规》对跨径为30米以下按矢跨比1/3、1/4和1/5分别所作可不计弹性压缩影响的规定,过于粗略,是值得商榷的。本文通过无铰拱桥准力计算公式的导演和变换,得出了弹性压缩时对推力计算的影响分额的判别式,并与长期以来一直沿用的施—扎氏活载推力公式作了比较,进而对可不计弹性压缩影响的无铰拱桥的跨度和矢跨比的范围提出了新的限界。
The “bridge gauge” is too rough for the calculation of the effect of elastic compression that the span-span ratio of 1/3, 1/4, and 1/5 is less than 30 meters in span, which is debatable. In this paper, through the director and transformation of the force calculation formula of the hingeless arch bridge, the discriminant of the influencing part of the thrust calculation when the elastic compression is obtained is compared with that of the Schneider - Zaischer live load thrust formula which has been used for a long time. Furthermore, new bounds are proposed for the span and span ratio range of a non-hinged arch bridge that can not be affected by elastic compression.