预应力索梁结构成型过程的实用分析方法

Study on the Practical Analysis Method of the Construction for Pre-Stressed Cable-Beam Structure

本文基于最小势能原理,给出了预应力索梁组合结构中的索、梁单元增量形式的独立平衡方程,建立了有限索元的非线性平衡迭代列式,利用其分析了一预应力索梁结构成型过程中的几何非线性问题,并对预应力索梁结构进行了非线性有限元的数值模拟。结果对比表明,该理论分析方法能够准确有效的考虑该结构中的非线性问题,为此类结构现场成型过程提供了一种快捷、可靠的非线性理论分析方法。

Based on the principle of minimum potential energy, equilibrium equations of cable and beam elements in cable-beam structures are proposed and nonlinear iteration equations are also obtained in the paper. Geometric nonlinearity analysis of the construction for a pre-stressed cable-beam structure is simulated with the proposed method as followed. The results show that the proposed method is much more effective to analysis the geometric nonlinearity performance of long span structures and should be an accurate, simple and reliable theoretical method for determining the construction of this type of structure in site.