钢筋凝混土壳体的非线性分析

NONLINEAR ANALYSlS OF REINFORCED CONCRETE SHELLS

本文采用有限元数值方法,分析计算了大型钢筋混凝土壳的几何、物理非线性静力问题。对非线性方程组的求解,文中提出了一种将载荷增量和位移增量相结合的合理方法,保证了在临界点附近迭代法的收敛性。最后,文中通过对实际双曲冷却塔壳的分析,得到了一些对实际工程设计具有指导意义的有益结论。

In this paper, a finite element procedure for the nonlinear static analysis of reinforced concrete shells considering geometrical and material nonlinearities is presented. The new technique is based on combination of the load increment and displacement increment Numerical results show that satisfactory convergence is guaranteed in the region near the critical point Finally, according to the design drawings, a 90 meter high reinforced concrete hyperbolic cooling lower has been analysed by the method and useful conclusions have been achieved.