| 用于预应力混凝土结构有限元分析的等效载荷法 |
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| 引用本文： | 苏京卫,姚春桥,李国清,周华杰.用于预应力混凝土结构有限元分析的等效载荷法[J].华中科技大学学报(城市科学版),2003,20(2):56-60. |
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| 作者姓名： | 苏京卫 姚春桥 李国清 周华杰 |
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| 作者单位： | 1. 华中科技大学,土木工程与力学学院,湖北,武汉,430074
2. 武汉市轨道交通股份有限公司,湖北,武汉,430011 |
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| 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．此方法可为预应力混凝土结构的有限元高精度分析提供一种可能的途径．
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| 关 键 词： | 预应力混凝土结构 有限元分析 等效载荷法 三维有限元 |
| 文章编号： | 1000-5730(2003)02-0056-05 |
| 修稿时间： | 2003年2月5日 |
Equivalent Load Method for Finite Element Analysis of Prestressed Concrete Structures |
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| SU Jing wei,YAO Chun qiao,LI Guo qing,ZHOU Hua jie.Equivalent Load Method for Finite Element Analysis of Prestressed Concrete Structures[J].Journal of Huazhong University of Science and Technology,2003,20(2):56-60. |
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| Authors: | SU Jing wei YAO Chun qiao LI Guo qing ZHOU Hua jie |
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| Affiliation: | SU Jing wei 1 YAO Chun qiao 2 LI Guo qing 1 ZHOU Hua jie 2 |
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| Abstract: | 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. |
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| Keywords: | equivalent load method prestressed concrete finite element |
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