考虑几何非线性钢筋混凝土板壳的有限条法

Finite strip method of reinforced concrete slabs and shells including geometric nonlinearity

在变厚度任意配筋的钢筋混凝土板壳考虑材料非线性分析的有限条法的基础上 ,将几何非线性的影响引入到钢筋混凝土板壳的有限条分析中 ,利用“拟刚度矩阵法” ,消除了有限条法在非线性分析时刚度矩阵与级数项的耦合 ,大大简化了有限条在处理非线性问题时的数值计算 ,结合算例证明了理论方法的有效性和精度。

In this paper, geometric nonlinearity is inclu de d in finite strip method, which is suggested for analysis of reinforced concrete slabs and shells with varying thicknesses and arbitrary steel reinforcements. I n nonlinear analysis, coupling between the different harmonic terms in stiffness matrix is disappeared according to “quasi-stiffness-matrix method” suggeste d by author. Numerical computation is greatly simplified in nonlinear analysis w ith finite strip method. A numerical example is given to manifest the effectiven ess and precision of the method.