A Study on Nonlinear analyses of Frame Structures To A Refined Extent Using An Superconputer

1. 只要假定上述条件，利用框架结构的特殊形状，就可以在与各种非线性问题相关的相当精细的程度上分析钢框架结构的构件。钢筋混凝土框架结构可以采用有限段法进行分析，该方法考虑了梁柱节点的剪切变形和梁、柱、梁柱节点间钢筋的连续作用。非线性方法是增量法，它是在增量势能平稳原理的基础上发展起来的。3 .采用基于梁理论的弹塑性分析方法对钢筋混凝土结构进行分析，可以明确钢筋混凝土结构各构件的受力分布和受力性能。本文建立了非线性结构分析中失稳结构的计算方法。该方法是一般非线性有限元法的改进版。提出了求解板壳几何非线性问题的有限元公式和算法。该算法的独特之处在于使用了具有新选择积分的9节点Lagragian四边形单元和有限变形本构方程。

1. Members of steel frame structures could be analyzed, always provided that the aforsaid-conditions can be assumed, to a considerably refined extent in relation with various nonlinear problems through utilizing the particular shape of the frame stvucture.2. Reinforced Concrete frame construction could be analyzed using finite segment method which considers the shear deformation of beam-column joints and the continuity of reinforcing bars among beam, column and beam-column joint. The ron-linear methad is the incremental method, which has developed on a basis of the stationary principle of incremental potential energy.3. Steel reinforud concrete (SRC) construction cold be analyzed using an elestic and plastic analysis method bazed on the beam theory, and the distribution of stress and the behavior of each component member of SRC structure could be made clear.4. The authov has established a method to cslcurate an instable structure in nomlinear stvuctural analysis. This method is an impraved version of ovdimary nonlinear finite element method.5. A finite element formulation and algovithm for geometrical nonlinear problem of plates and shells is preseuted. A unique feature of this algorithm is the use of a 9-node Lagragian quadrilateral element with new selective integration and a finite-detormetion constitutive equation.