铝合金受弯构件变形性能的非线性分析
Non-linear Deformation Analysis of Aluminum Bending Members
作者：石永久(清华大学 土木工程系，清华大学 结构工程与振动教育部重点实验室，北京 100084)；程明(清华大学 土木工程系，清华大学 结构工程与振动教育部重点实验室，北京 100084)；王元清(清华大学 土木工程系，清华大学 结构工程与振动教育部重点实验室，北京 100084)
Author：(Dept. of Civil Eng., Key Lab. of Structural Eng. and Vibration of China Edu. Ministry, Tsinghua Univ., Beijing 100084, China)；(Dept. of Civil Eng., Key Lab. of Structural Eng. and Vibration of China Edu. Ministry, Tsinghua Univ., Beijing 100084, China)；(Dept. of Civil Eng., Key Lab. of Structural Eng. and Vibration of China Edu. Ministry, Tsinghua Univ., Beijing 100084, China)
收稿日期：2005-06-06 年卷（期）页码：2006,38(1):10-14
期刊名称：工程科学与技术
Journal Name：Advanced Engineering Sciences
关键字：铝合金受弯构件;荷载-挠度关系;有限元分析;理论计算;非线性拟合
Key words：aluminum bending members; load-deflection relationship; finite-element analysis; theoretical calculation; non-linear fitting
基金项目：
中文摘要
为了研究铝合金的材料非线性对其受弯构件变形的影响，采用有限元方法研究了铝合金受弯构件荷载-挠度关系的影响因素，并以主要因素为参数，计算了126根梁的荷载-挠度曲线。根据欧规9(Eurocode 9)中给出的弯矩-曲率公式推导出荷载-挠度公式，并用数值积分的方法计算了一些受弯构件的荷载-挠度关系。讨论了有限元计算结果与理论计算结果的差异。以有限元计算结果为基础，用非线性拟合的方法修正了荷载-挠度公式中的系数，给出了铝合金受弯构件荷载-挠度关系的计算方法。结果表明，计算铝合金受弯构件的变形时需要考虑材料非线性的影响，本文的计算方法准确性较高。
英文摘要
In order to investigate the nonlinear deformation of aluminum bending members, the influencing factor analysis of loaddeflection relationship was presented adopting finiteelement analysis (FEA) methods. The loaddeflection curves of 126 aluminum bending members were calculated considering structural dimensions, material properties and load distribution. The theoretical formula of loaddeflection curves was deduced from the momentcurvature relationship proposed in EC 9, some loaddeflection curves were evaluated by numerical integrating. The differences between the results of FEA method and of theoretical method were discussed. The coefficients of the theoretical formula were modified by FEA results using nonlinear fitting method. The semiempirical formula for computing the loaddeflection curve of aluminum bending members was then proposed. The result shows that the influence of nonlinear material properties of aluminum alloy should be considered when computing the deformation of aluminum bending members, and the calculating methods of this paper are comparatively accurate.
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