（北京市建筑设计研究院有限公司， 北京 100045）

［摘要］纤维梁单元是建筑结构领域常用的非线性单元，广泛用于弹塑性动力及静力分析，其计算效能和计算精度有着举足轻重的影响。推导了几种纤维梁单元的计算原理并研究了具体实现方法，这些单元包括不考虑剪切变形的欧拉梁以及考虑剪切变形的铁木辛柯梁，其中铁木辛柯梁又可以按照结点数量和插值函数分为2，3，4结点单元。分别给出了各类单元的数值算例，并结合ABAQUS软件进行了分析对比，给出了纤维梁单元选择的一般性建议。

［关键词］纤维梁单元； 非线性； 剪切变形； ABAQUS

中图分类号：TU313文献标识码：A文章编号：1002-848X(2018)20-0060-05

Research and application of nonlinear fiber beam elements

Wu Yunpeng, Han Bo, Guo Feng, Miao Qisong

（Beijing Institute of Architectural Design, Beijing 100045, China）

Abstract:Fiber beam elements are commonly used nonlinear elements in the field of building structures. It is widely used in elasto-plastic dynamic and static analysis, and it’s computational efficiency and calculation accuracy have a decisive influence. The calculation principles of several fiber beam elements were deduced and the specific implementation methods were studied. These elements include Euler beams that do not consider the shear deformation and Timoshenko beams that take into account the shear deformation, and Timoshenko beams can be classified into two-node elements, three-node elements, and four-node elements according to the number of nodes and the interpolation function. Numerical examples of these types of elements were given respectively, and compared with ABAQUS software, general suggestions for the selection of fiber beam elements were given. At present, these elements have been implemented completely in Paco, a software for structure design developed by Beijing Institute of Architectural Design independently, and satisfied verification results have been achieved.

Keywords:fiber beam elements; nonlinear; shear deformation; ABAQUS

作者简介：武云鹏，博士，高级工程师，一级注册结构工程师，Email：wuyunpeng@biad.com.cn。