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（北京市建筑設(shè)計研究院有限公司， 北京 100045）
［摘要］纖維梁單元是建筑結(jié)構(gòu)領(lǐng)域常用的非線性單元，廣泛用于彈塑性動力及靜力分析，其計算效能和計算精度有著舉足輕重的影響。推導(dǎo)了幾種纖維梁單元的計算原理并研究了具體實現(xiàn)方法，這些單元包括不考慮剪切變形的歐拉梁以及考慮剪切變形的鐵木辛柯梁，其中鐵木辛柯梁又可以按照結(jié)點(diǎn)數(shù)量和插值函數(shù)分為2，3，4結(jié)點(diǎn)單元。分別給出了各類單元的數(shù)值算例，并結(jié)合ABAQUS軟件進(jìn)行了分析對比，給出了纖維梁單元選擇的一般性建議。
［關(guān)鍵詞］纖維梁單元； 非線性； 剪切變形； ABAQUS
中圖分類號：TU313文獻(xiàn)標(biāo)識碼：A文章編號：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
作者簡介：武云鵬，博士，高級工程師，一級注冊結(jié)構(gòu)工程師，Email：wuyunpeng@biad.com.cn。
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