风荷载作用下的钢结构拱的安全分析

宁波大红鹰职业学院内的人行景观桥上设有一装饰性钢拱,该钢拱在风荷载作用下的安全性是设计者所关心的内容.为了准确有效地校验该钢拱的安全性,本文将钢拱拱肋等效为杆系单元,通过有限元程序Ansys计算了其在风荷载和重力荷载下的应力、位移、失稳形态以及稳定系数,验算了其强度、刚度和稳定性.结果表明: 该钢拱完全满足强度、刚度以及稳定性要求.

The safety analysis of the steel arch under the wind load

The footbridge in the Ningbo Dahongying Vocational Technical College has an ornamental steel arch, the safety of which under the wind load was concerned by designers.The arch rib was directly equivalent to beam element. The general finite element program Ansys was used to compute the stress, displacement, buckling model and stability coefficient strength of steel arch under the gravity and wind loads, and to check its strength, stiffness and stability. The result shows that its strength,stiffness and stabil...