摘要
针对预应力混凝土结构中预应力的作用 ,分析了 H.B.B.Moorman提出的的等效载荷法的实用性 ,给出了预应力沿筋向发生变化以及大垂度抛物线筋的等效载荷的高阶计算公式 ,提出了两种用于三维有限元的等效节点力计算方法 .通过含单根和多根预应力曲线筋混凝土结构的计算实例 ,证明此方法对于预应力混凝土结构的三维有限元分析是有效的 .
Equivalent load method for finite element analyze prestressed concrete structures is presented. A high order equation is obtained by extending Moorman's equation, which is suitable to analyze the prestressed curved bar with higher altitude and to analyze the prestress forces varying along the axis of the bar. Two computation procedures for equivalent load analysis combined with 3D finite element theory are illustrated with numerical examples. The equivalent load methods yield a precise result compared with the results obtained by other methods. It is shown that these methods provide a possible approach to analysis of prestressed concrete structures with higher accuracy.
出处
《华中科技大学学报（城市科学版）》
CAS
2003年第2期56-60,共5页
Journal of Huazhong University of Science and Technology
