| 基于ABAQUS考虑钢筋影响的 混凝土构件收缩徐变分析 |
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| 引用本文： | 张望喜,谢宏涛,王雄,谭泽腾.基于ABAQUS考虑钢筋影响的 混凝土构件收缩徐变分析[J].重庆大学学报(自然科学版),2019,42(11):64-78. |
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| 作者姓名： | 张望喜 谢宏涛 王雄 谭泽腾 |
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| 作者单位： | 湖南大学 土木工程学院,长沙 410012;湖南大学 工程结构损伤诊断湖南省重点实验室 ,长沙 410012;湖南大学 土木工程学院,长沙,410012 |
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| 基金项目： | 国家自然科学基金资助项目（51578228）；国家重点研发计划专项资助项目（2016YFC0701400）。 |
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| 摘 要： | 基于CEB-FIP(2010)模型采用MATLAB拟合徐变曲线,通过ABAQUS分析软件二次开发了收缩徐变计算程序。在参数验证的基础上,模拟计算了素混凝土及钢筋混凝土柱、单层三跨框架梁在不同参数影响下考虑徐变和收缩影响的竖向变形,提出了考虑钢筋影响的变形折减系数并分析了其影响参数,拟合了不同影响因素下柱的折减系数公式。结果表明:柱的尺寸、混凝土强度与折减系数为二次曲线关系,湿度、配筋率与折减系数为线性关系,轴压比对折减系数影响不大;梁的截面高度、混凝土强度、配筋率与折减系数为二次曲线关系,湿度与折减系数呈线性关系,梁上线荷载大小对折减系数影响不大;折减系数公式能很好地考虑钢筋对混凝土收缩徐变的影响。
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| 关 键 词： | 收缩 徐变 钢筋影响 折减系数 |
| 收稿时间： | 2019/4/28 0:00:00 |
Shrinkage and creep analysis of concrete members considering reinforcement based on ABAQUS |
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| ZHANG Wangxi,XIE Hongtao,WANG Xiong and TAN Zeteng.Shrinkage and creep analysis of concrete members considering reinforcement based on ABAQUS[J].Journal of Chongqing University(Natural Science Edition),2019,42(11):64-78. |
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| Authors: | ZHANG Wangxi XIE Hongtao WANG Xiong and TAN Zeteng |
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| Institution: | Civil Engineering College, Hunan University, Changsha 410012, P. R. China;Hunan Provincial Key Lab on Diagnosis for Engineering Structures, Hunan University, Changsha 410012, P. R. China,Civil Engineering College, Hunan University, Changsha 410012, P. R. China,Civil Engineering College, Hunan University, Changsha 410012, P. R. China and Civil Engineering College, Hunan University, Changsha 410012, P. R. China |
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| Abstract: | Creep curve is fitted by MATLAB based on CEB-FIP(2010), and shrinkage and creep calculating program is designed by using ABAQUS. Based on parameter verification,vertical deformation component of column and frame beam models with rebar or without rebar under different parameters considering creep and shrinkage were obtained, deformation reduction factor considering the influence of steel bar is proposed and its influencing parameters are analyzed, and the column reduction coefficient formula under different factors is fitted. The results show that the relation between dimension, concrete strength, and reduction factor is quadratic curve, the relation between ratio of reinforcement in column, humidity and reduction factor is linear, while axial compression ratio has little effect on reduction coefficient. The relation between beam section height, concrete strength, ratio of reinforcement in frame beam and reduction factor is quadratic curve, the relation between humidity and reduction factor is linear, while the vertical load on beam has little effect on reduction coefficient. The column reduction factor formula can better consider the effect of steel bars on the shrinkage and creep of concrete. |
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| Keywords: | shrinkage creep effect of reinforcement deformation ratio |
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