The long span dome structure are mostly steel truss structure. The member of steel truss are almost round steel tube, and curvechord.
大跨度穹顶建筑物多采用钢桁架体系,钢桁架的杆件一般采用圆钢管,弦杆为曲线。
2
This article has extended a property of the right Angle chord of the circular cone curve to the general cases.
本文将圆锥曲线的直角弦的一个性质推广到了一般情形。
3
In this paper, the existence theorem of midpoint chord of quadratic curve, as well as its proof, is given via methods of projective geometry and polarity principle.