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采用扁平化的非圆弧拱是目前拱坝设计中兼顾稳定和应力的一种趋向。本文将各种非圆弧拱与圆弧拱的特性进行了比较,发现当拱厚较薄(例如拱厚与拱跨之比<0.15)而拱圈中心角足够大时,传统的圆弧拱仍是一种较好的拱圈形状;但随着中心角的减小,圆弧拱逐渐失去优势,而非圆弧拱从拱冠开始较大范围内的应力可能呈均匀分布,且数值明显低于圆弧拱,如果采用拱端附近变截面的拱圈,将优于圆弧拱。
The use of flat non-circular arc arch dam design is taking into account the stability and stress of a trend. In this paper, the characteristics of various non-circular arches and arched arches are compared and found that when the arches are thin (for example, the ratio of arches to arches is less than 0.15) and the central angle of arches is large enough, However, as the central angle decreases, the arc arch gradually loses its advantage, whereas the stress in the larger range from the arch crown of the non-arc arch may be evenly distributed, and the value is obvious Below the arc arch, if the arch near the arch with variable cross-section, will be superior to arc arch.