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| M acroscopic analysis model of PC bending beams with I-shaped section based on M-Ф relationship |
| LOU Tie-Jiong, FU Xiao-Bin, GUO Yi-Mu |
1．Department of Engineering Mechanics，Zhejiang University，Hangzhou 310027，China；
2．Consulting Corporation for Construction Engineering，Ningbo University，Shaoxing Subsidiary，Shaoxing 312000，China |
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Abstract Pre—stressed concrete(PC)beam with I-shaped section has been widely applied in practical engineering structure． Beam with T，inverted T or rectangular section is its special simplifled form．It is a practical job to establish a simple and efficient analysis model for such PC beam．From the nonlinear stress-strain relationships of constitutive materials，moment-curvature(M-C) relationships of I-shaped PC section。through which bending-resistance stiffness of all elements along the beam can be determined，are established by section analysis． Based on these，a macroscopic finite element model considering the material nonlinearity for analysis of PC bending beams with I-shaped section is developed．The comparison between the test result of one tested beam and the test data indicates that this model is capable to simulote the nonlinear response of a PC beam over the entire range of loading up to failure．
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Published: 28 October 2004
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基于M-Ф关系的工形PC弯曲梁的宏观分析模型
工形预应力混凝土(PC)梁在实际工程结构中的应用非常广泛，T形、倒T形和矩形梁都是工形梁的特殊简化形式，建立简单实用的工形PC梁的分析模型非常有实际意义．从材料非线性本构关系出发，通过截面分析导出工形PC截面的弯矩一曲率(M-Ф)关系，由此确定沿梁长度方向所有单元的抗弯刚度，建立起考虑材料非线性的工形PC弯曲梁的宏观有限元模型．试验梁分析结果与试验数据对比表明，该模型能模拟PC弯曲梁整个加载过程的非线性结构响应．
关键词：
预应力混凝土梁,
有限元,
非线性分析,
弯矩&mdash,
曲率关系
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