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本文考虑钢衬、预应力钢筋和普通钢筋的影响,用等参有限元位移法解算预应力混凝土压力容器的弹性问题。研究了形函数满足收敛准则和实现等参变换的条件,以及构成各类单元形函数的一般通用方法。其次,考虑钢衬和钢筋的影响,分别导出了它们对三维体单元刚度矩阵贡献的公式。简单介绍了三维等参元弹性应力分析通用程序(CHFEM)的特点。最后通过实例,对理论计算值和实验结果进行了比较。
In this paper, the effects of steel linings, prestressed steel bars and ordinary steel bars are considered. The elastic parameters of prestressed concrete pressure vessels are solved by using the isoparametric finite element displacement method. The conditions of the shape function satisfying the convergence criterion and the implementation of the isoparametric transformation are studied, as well as the general general methods of constructing various types of unitary functions. Secondly, considering the effects of steel liners and steel bars, the formulas that contribute to the three-dimensional volumetric element stiffness matrix are derived. The characteristics of the three-dimensional isoparametric elastic stress analysis general program (CHFEM) are briefly introduced. Finally, through examples, the theoretical calculations and experimental results are compared.