摘要
为解决大跨度和大空间曲线单层网壳结构的稳定性问题及可靠度计算,以某城市火车西站拱形站房屋面单层网壳结构为研究对象,基于结构稳定性微分平衡方程,运用数值模拟手段分析不同初始缺陷的单层网壳结构的位移–荷载系数曲线,并对结构的可靠度进行研究。结果表明,位移小于10 mm时,3种工况的位移–荷载系数曲线几乎一致,而当位于大于10 mm后,单层网壳结构表现出非线性荷载破坏,在达到荷载峰值后,逐步减小;在统计分析单层网壳结构的随机变量的基础上,求解得到其稳定承载力的分布类型为正态分布。
In order to solve the stability problem of large-span and large-span curved single-layer reticulated shell structures and to calculate the reliability,the single-layer reticulated shell structure of an urban west railway station arch station building surface is taken as the research object.Based on the differential equilibrium equation of structural stability,the displacement load coefficient curve of single-layer reticulated shell structures with different initial defects is analyzed by numerical simulation,and the reliability of the structure is studied.The results show that when the displacement is less than 10 mm,the displacement load coefficient curves of the three working conditions are almost the same,while when the displacement is greater than 10 mm,the failure form of the monolayer reticulated shell structure shows nonlinear,and gradually decreases after reaching the peak load;the stability bearing capacity distribution for this single-layer reticulated shell structure we study here is Gaussian distribution base on the input of its statistical analysis of the random variables.
出处
《建筑技术开发》
2023年第3期23-25,共3页
Building Technology Development
关键词
单层网壳结构
微分平衡控制方程
稳定性分析
可靠度分析
single layer reticulated shell structure
differential equilibrium control equation
stability analysis
reliability analysis
