幕墙支撑杆的纵横弯曲计算和稳定性分析

Vertical and Horizontal Bending Calculation and Stability Analysis of Curtain Wall Strut Bar

阐述幕墙杆索结构中支撑杆的纵横弯曲计算,并由此讨论杆件的稳定性。考虑横向力和轴向力的弯曲变形问题,列出支撑杆挠曲轴的微分方程,并给出求解方程的具体步骤,通过实验提出对幕墙支撑杆失稳的新判据,引入修正系数,改进压杆失稳的临界应力计算公式,实验结果表明改进的计算公式精确有效。

A vertical and horizontal bending calculation of the supporting pole in curtain wall strut-cable structure is presented, and the stability of the pole is discussed. The bending differential equations of supporting pole with axial and lateral loads are established, and the particular processes of solving the equations are given. A new instability criterion of the pole is founded with the help of experiments. Then critical stress formulas of strut bar are improved with the modificatory coefficients. The experimental results show that the improved formulas are precise and valid.