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三、圆弧无铰拱的受力性能分析 (1) 矢跨比较小时(f/L≤1/8)的受力性能: 由表2可知,拱轴线若与压力线五点重合时,荷载系数随f/L值的变小而变小,当f/L≤1/8时m值已在1.4033以下。拱轴线与压力线虽然五点重合,但在其它点上均有偏离。当f/L较大时3/8L及1/8L点的偏离数值甚大,而随f/L值或“五点重合”时的m值变小而变小。当f/L值小于1/8以后偏离已微不足道。 f/L=1/8时,1/8L点处的偏离(△y 1/8)为0.00043f而在3/8L点处(△y 3/8)仅为0.00006f。当f/L=1/9时,△y 1/8=0.00028f,△y 3/8=0.00003f,设L=80米,则f=8.889米,其在1/8L
Third, the analysis of the force performance of circular arc-free arch (1) The force-bearing performance when the ratio of sag is relatively small (f / L≤1 / 8): Table 2 shows that if the arch axis coincides with five points of pressure line, The coefficient becomes smaller as the value of f / L becomes smaller. When f / L is less than 1/8, the value of m is already below 1.4033. Arch axis and pressure line although the five coincide, but at other points have deviations. When f / L is large, the values of 3 / 8L and 1 / 8L points are very large, and they become smaller with the values of f / L or the values of m at the “5-point coincidence”. When the f / L value is less than 1/8 deviations have been negligible. f / L = 1/8, the deviation at the 1/8 L point (Δy 1/8) is 0.00043f and at the 3/8 L point (Δy 3/8) is only 0.00006f. Δy 1/8 = 0.00028f, Δy 3/8 = 0.00003f when f / L = 1/9, f = 8.889m when L = 80m,