摘要
在一阶特征值屈曲分析的基础上,用ANSYS软件对4个典型梭形桁架屋盖结构进行荷载-位移全过程分析,进一步研究支座形式、檩条、上弦水平支撑对梭形桁架整体稳定的影响。计算结果表明,采用二阶屈曲分析模式有可能过低估计临界荷载值,使设计偏保守,对于大跨桁架如何正确估计二阶屈曲分析的临界值仍有进一步深入研究的必要;在构造上加强檩条与横向桁架间节点刚度能够提高结构的抗失稳能力。
Based on the eigenvalue buckling analysis,the whole process of load-deflection response is analyzed for four roof structures,which are composed of shuttleshaped trusses by ANSYS.The influence of support style,purlin,horizontal brace of top chord is further investigated on integral stability of shuttle-shaped truss.The results show that second-order buckling analysis may be underestimate the buckling load and lead to conservative design.It is necessary to further study how to correctly estimate the second-order buckling load for large span truss.It can improve the structural stability to strengthen node stiffness between the purlin and horizontal truss in construction.
出处
《工业建筑》
CSCD
北大核心
2010年第S1期421-422,476,共3页
Industrial Construction
关键词
梭形桁架
整体稳定
全过程分析
shuttle-shaped truss
integral stability
whole process analysis
