[1]张峰,叶见曙.预应力混凝土梁开裂后的结构行为[J].东南大学学报(自然科学版),2005,35(4):584-588.[doi:10.3969/j.issn.1001-0505.2005.04.019]
　Zhang Feng,Ye Jianshu.Structure behavior of cracked prestressed concrete beam[J].Journal of Southeast University (Natural Science Edition),2005,35(4):584-588.[doi:10.3969/j.issn.1001-0505.2005.04.019]
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预应力混凝土梁开裂后的结构行为()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
35
期数:
2005年第4期
页码:
584-588
栏目:
交通运输工程
出版日期:
2005-07-20

文章信息/Info

Title:
Structure behavior of cracked prestressed concrete beam
作者:
张峰;  叶见曙
东南大学交通学院, 南京 210096
Author(s):
Zhang Feng;  Ye Jianshu
College of Transportation, Southeast University, Nanjing 210096, China
关键词:
Timoshenko梁;  非线性;  有限元法;  本构关系;  中性轴;  试验
Keywords:
Timoshenko beam;  non-linearity;  finite element method;  constitutive equations;  neutral axis;  test
分类号:
U441
DOI:
10.3969/j.issn.1001-0505.2005.04.019
摘要:
为了研究预应力混凝土梁开裂后的结构非线性行为,基于Timoshenko分层梁理论,选取恰当的混凝土和钢筋的本构关系,考虑了混凝土的拉伸刚化效应和中性轴变化对预应力钢筋混凝土梁的受力、变形的影响,有效地模拟了预应力混凝土梁的开裂、屈服和失效全过程.分析了预应力混凝土梁在单调加载下的受力性能,并与试验结果进行比较.探讨了梁开裂后的刚度和截面的应力重分布现象.算例表明分层梁单元模型对于预应力混凝土梁的非线性分析有良好的适应性,对梁开裂后的使用性能评估有实际应用价值.
Abstract:
In order to research the non-linearity structure behavior of the cracked prestressed concrete beam, some factors were considered by using Timoshenko layered beam theory, including the constitutive equation of concrete and steel, the tension stiffening affection of concrete, and the impacts of neutral axis changing on the prestressed concrete beam’s mechanical performance. The whole process of the prestressed concrete beam’s cracking and crushing was effectively simulated. The nonlinear analysis results of a prestressed concrete beam model under monotonic loading were compared with the results from static test, and the stiffness and the stress redistribution were also analyzed. The results show that the layered beam model can well describe the nonlinear behavior of the prestressed concrete beams and it is valuable to evaluate the serviceability of the cracked beam.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 江苏省交通科学研究资助项目(04Y051).
作者简介: 张峰(1978—),男,博士生; 叶见曙(联系人),男,教授,博士生导师,yejianshu@seu.edu.cn.
更新日期/Last Update: 2005-07-20