| 扩展散体单元法在钢筋混凝土桥梁倒塌分析中的应用 |
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| 引用本文： | 孙利民,秦东,范立础. 扩展散体单元法在钢筋混凝土桥梁倒塌分析中的应用[J]. 土木工程学报, 2002, 35(6): 53-58 |
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| 作者姓名： | 孙利民 秦东 范立础 |
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| 作者单位： | 同济大学(孙利民，秦东)，同济大学(范立础) |
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| 基金项目： | 国家自然科学基金重大项目 (5989541 0 )，国家教育部科学技术重点项目 (990 4 2 ) |
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| 摘 要： | 通过对原有钢筋混凝土结构扩展散体单元模型予以改进 ,提出了质点—桁架模型。将钢筋混凝土离散成单个质点 ,质点之间用桁架杆 (非线性弹簧 )联结 ,局部的破坏通过弹簧联结的断裂进行模拟 ,由此可计算结构从局部破坏到整体倒塌的全过程。借助面向对象的程序 (OOP)语言VisualC + +编制了分析软件 ,并计算了一个地震作用下独柱式桥墩倒塌的实例。计算结果表明 ,运用散体单元法分析桥梁倒塌 ,可直观地定性把握结构损伤发展直至倒塌破坏的全过程 ,对于结构倒塌破坏的机理研究具有重要意义。
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| 关 键 词： | 钢筋混凝土桥梁 散体单元法 倒塌分析 |
| 文章编号： | 1000-131X(2002)06-0053-06 |
| 修稿时间： | 2001-06-27 |
A NEW MODEL FOR COLLAPSE ANALYSIS OF REINFORCED CONCRETE BRIDGE |
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| Sun Limin Qin Dong Fan Lichu. A NEW MODEL FOR COLLAPSE ANALYSIS OF REINFORCED CONCRETE BRIDGE[J]. China Civil Engineering Journal, 2002, 35(6): 53-58 |
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| Authors: | Sun Limin Qin Dong Fan Lichu |
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| Abstract: | A particle?truss model is proposed in the paper;it is used for collapse analysis of the reinforced concrete bridge.It is based on the improvements of the extended distinct element method.The reinforced concrete is molded as particles connected each other by a truss member (nonlinear springs) The local failure is simulated by the breaking of springs.It can be used to simulate the structural behaviors from local failure to whole collapse.At same time,an object?oriented program is developed.An example of the simulation on the collapse of a single?column pier under earthquake is carried out.The results show that it can predict qualitatively the whole collapse process of structure |
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| Keywords: | Reinforced concrete bridge distinct element method collapse analysis |
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