论文部分内容阅读
选取轴对称肋环型索穹顶结构的1条肋,用约束力代替多余约束,根据力的平衡,推导了节点之间脊索与斜索共同传递的竖向力及径向水平力计算公式,给出了脊索、斜索、环索和撑杆初始预应力计算公式.本文方法将初始预应力分为两部分:一部分为中心脊索水平约束力为0、竖向荷载下的初始预应力值;一部分为中心脊索水平约束力为P的自平衡预应力.其中,自平衡预应力与P呈线性变化,可以通过提高约束力P提高整个索穹顶结构的初始预应力水平,从而满足各种荷载工况下的受力要求.最后,通过一个算例介绍了本文方法的计算过程并验证了方法的正确性.
One rib of axial symmetric ribbed cable dome is selected and the binding force is used to replace the redundant constraint. Based on the balance of forces, the formulas for calculating the vertical force and radial horizontal force jointly transmitted between the nodes and the inclined cables are derived. The formulas of initial prestressing force of ridges, inclined cables, ring cables and struts are presented.The initial prestressing force in this paper is divided into two parts: one is the horizontal prestress value of the central ridges at 0 and the initial prestress value under vertical load; Is the self-balanced prestress with the horizontal binding force of the central ridges as P. Among them, the self-balanced prestress changes linearly with P, and the initial prestress level of the entire cable dome structure can be increased by increasing the binding force P so as to meet various load conditions Under the stress requirements.Finally, an example is given to illustrate the computational process of the proposed method and verify the correctness of the method.