[1] Zhang Feng, Li Shucai, Li Shuchen, Ye Jianshu, et al. Finite element failure analysisof continuous prestressed concrete box girders [J]. Journal of Southeast University (English Edition), 2009, 25 (2): 236-240. [doi:10.3969/j.issn.1003-7985.2009.02.020]

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Finite element failure analysisof continuous prestressed concrete box girders()

预应力混凝土连续箱梁有限元损伤分析

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

25

Issue:

2009 2

Page:

236-240

Research Field:

Traffic and Transportation Engineering

Publishing date:

2009-06-30

Info

Title:

Finite element failure analysisof continuous prestressed concrete box girders

预应力混凝土连续箱梁有限元损伤分析

Author(s):

Zhang Feng¹;  Li Shucai¹;  Li Shuchen¹;  Ye Jianshu²;  Lei Xiao²

¹School of Civil and Hydraulic Engineering, Shandong University, Jinan 250061, China
²School of Transportation, Southeast University, Nanjing 210096, China

张峰¹;  李术才¹;  李树忱¹;  叶见曙²;  雷笑²

¹ 山东大学土建与水利学院, 济南 250061; ² 东南大学交通学院, 南京 210096

Keywords:

full-scale failure test;  prestressed concrete box girder;  finite element analysis;  combined element;  prestressed tendon;  load carrying capacity

实桥破坏性试验;  预应力混凝土箱梁;  有限元分析;  组合单元;  预应力钢筋;  极限承载能力

PACS:

U448.35

DOI:

10.3969/j.issn.1003-7985.2009.02.020

Abstract:

In order to analyze the load carrying capacity of prestressed concrete box girders, failure behaviors of in-situ deteriorated continuous prestressed concrete box girders under loading are experimentally observed and a finite failure analysis method for predicting behaviors of box girders is developed. A degenerated solid shell element is used to simulate box girders and material nonlinearity is considered. Since pre-stressed concrete box girders usually have a large number of curve pre-stressed tendons, a type of combined element is presented to simulate the prestressed tendons of box girders, and then the number of elements can be significantly reduced. The analytical results are compared with full-scale failure test results. The comparison shows that the presented method can be effectively applied to the failure analysis of in-situ continuous prestressed concrete box girders, and it also shows that the studied old bridge still has enough load carrying capacity.

为了确定预应力混凝土箱梁的极限承载能力, 进行了预应力混凝土连续箱梁的破坏性试验, 提出一种有限元损伤分析方法模拟箱梁结构行为.基于实体退化壳单元对箱梁进行模拟, 并考虑了结构材料的非线性效应.由于预应力混凝土箱梁中通常存在大量曲线预应力钢筋, 提出一种组合单元, 并用该单元模拟箱梁中的预应力钢筋, 该方法可使结构分析时单元数量大大降低.试验结果和理论分析对比表明:提出的方法能够有效地用于预应力混凝土连续箱梁的破坏性试验计算分析中;研究的旧桥依然存在较大的极限承载能力.

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Memo

Memo:

Biography: Zhang Feng(1978—), male, doctor, lecturer, zhangfeng2008@sdu.edu.cn.
Foundation items: Post-Doctoral Innovative Projects of Shandong Province(No.200703072), the National Natural Science Foundation of China(No.50574053).
Citation: Zhang Feng, Li Shucai, Li Shuchen, et al.Finite element failure analysis of continuous prestressed concrete box girders[J].Journal of Southeast University(English Edition), 2009, 25(2):236-240.

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