Факторы, влияющие на критическую нагрузку и распространение местной потери устойчивости в сетчатых оболочках (современные достижения)

Настоящая работа является попыткой синтетического подхода к проблемам расчета и проектирования сетчатых оболочек, для которых главной задачей является обеспечение устойчивости. В работе представлена современная библиография по проблеме устойчивости сетчатых куполообразных оболочек. Рассмотрены несколько видов общей потери устойчивости конструкций, а также опасное явление распространение местной потери устойчивости их элементов. Представлены экспериментальные данные и сделаны теоретические выводы.

Factors influencing the critical load and propagating of buckling in shallow reticulated domes (state-of-the-art)

Shallow lattice domes can be used to cover large support-free, e. g. assembly halls, sports stadium and exhibition halls. Over the last four decades the problem of buckling of shallow lattice domes has grown in importance because of several interrelated developments. The need to cover larger spans without intermediate supports with lightweight structures has made buckling behavior a determining factor in their design. For a buckling problem it is very important to define the concept concerning the loss of stability and the method to determine the collapse load. Several instability modes can occur in the behavior of the reticulated shells which must be taken into account in determining the limit bearing capacity. The secondary paths, especially in unstable buckling can play the most important role in collapse of these structures [1; 2]. The present report is an attempt to offer a synthetic view of the analysis and design problems for which the consideration of buckling is the main purpose. Another purpose of this report is to present the up-to-date bibliography on the buckling of reticulated shells. Several instability modes has been presented and the propagation of local buckling which is the most dangerous forms of instability has been discussed and many valuable theoretical and experimental studies have been carried out [3].