论文部分内容阅读
针对目前普遍采用的二阶分析方法存在的问题,分别推导了考虑梁柱效应的受拉与受压杆件的位移插值函数。利用级数展开,提出了同时适用于受拉与受压情况、考虑梁柱效应的杆件失稳前计算模型。引入杆件失稳判别条件与杆件失稳后计算模型,建立了考虑杆件失稳的单层网壳结构二阶分析计算方法。算例分析表明:该文方法能较好体现二阶效应与杆件失稳对结构位移与承载力的影响,具有较高的计算精度与效率。不考虑杆件失稳会高估结构承载力,不考虑二阶效应无法准确计算结构响应,因此对单层网壳结构进行分析计算时应考虑杆件失稳,且采用二阶分析方法。
In order to solve the existing problems of the second-order analysis method, the displacement interpolation function of tension and compression rod considering beam-column effect is deduced respectively. By using series expansion, a pre-buckling calculation model is proposed which is suitable for both tension and compression, considering beam-column effect. The condition of discernment of bar member and the calculation model of bar member instability are introduced. The second order analytical calculation method of single layer reticulated shell structure considering the instability of bar member is established. The case study shows that this method can better reflect the influence of second-order effect and instability of bar on the displacement and bearing capacity of the structure, and has higher accuracy and efficiency. Failure to consider the failure of the bar will overestimate the bearing capacity of the structure, and the structural response can not be accurately calculated without considering the second-order effect. Therefore, the instability of the bar should be considered in the analysis and calculation of the single-layer reticulated shell structure, and the second order analysis method is used.