开窗的保温龙骨墙体抗弯性能有限元分析

Finite element analysis on bending behaviour of thermal stud enclosing wall with window holes in the wall

为推进腹板开孔的轻钢龙骨墙体这种新型绿色外围护构件在我国建筑工程中的应用,利用有限元软件ABAQUS对其抗弯性能进行分析,分析时考虑了窗洞口的影响。在验证了有限元分析方法可靠性的基础上,分析腹板开孔轻钢龙骨外围护墙体在风荷载作用下的抗弯性能,确定其抗弯刚度、破坏模式及应力状态。通过对比分析,讨论窗洞口对墙体抗弯性能的影响。分析结果表明,当窗墙面积比为0.5时,墙体抗弯承载力与抗弯刚度分别比不开窗墙体低30%与66%。龙骨腹板高度为150 mm的该类墙体可满足我国大部分地区建筑高度不超过50 m的城市建筑外围护墙体的抗风要求。

In order to put the new energy-saving enclosing walls with slotted steel stucts into application in China, a finite element analysis on their bending behaviours was carried out with ABAQUS. The analysis results were compared with the experimental ones to verify the reliability of the finite element model and the analysis method. With this model, the bending behaviours of light-gauge slotted steel stud enclosing wails with window holes was analysed to determine their stiffness, failure modes, and stress states when subjected to wind loading. A comparative study was carried out to investigate the influence of the window holes on the bending behaviours of the walls. Analysis results indicate that the walls subjected to distributed wind loading will fail due to the shear buckling at the end of the steel stud next to the window hole. This new enclosing wall with a web height of 150 mm can meet the wind resistance requirement for buildings with a height less than 50 m in most areas of China.