Stochastic geometrically nonlinear elasto-plastic buckling and behaviour of curved grid-like structures

当结构参数和荷载不可避免地存在不确定性时，评估大型空间弯曲复杂结构的安全性对于设计和修复是至关重要的。本项目旨在开发一个先进的随机框架，用于曲线型网架结构的三维非线性弹塑性行为和屈曲分析。提出了一种合理的、功能强大的随机非线性弹塑性有限元模型，以考虑随机高阶几何非线性和材料弹塑性。还将为随机非线性分析设计新的公式和有效的算法。将开发一种有效的工具来评估这类结构的可靠性。

It is vital to assess the safety of large spatially curved-complex structures for design and rehabilitation purposes when the inevitable uncertainties in structural parameters and loads are addressed. This project aims to develop an advanced stochastic framework for three-dimensional nonlinear elasto-plastic behaviour and buckling analysis of curved grid-like structures. A rational and powerful stochastic nonlinear elasto-plastic finite element model will be proposed to account for the random high-order geometric nonlinearity and material elasto-plasticity. Novel formulations and effective algorithms will also be devised for stochastic nonlinear analytical analysis. An efficient tool will be developed for reliability assessment of the class of structures.