冻融循环后的型钢混凝土黏结滑移性能研究
PDF下载 (261)姚志成,李俊华,张幸锵,王 峥.冻融循环后的型钢混凝土黏结滑移性能研究[J].宁波大学学报(理工版),2023,36(1):49-56.DOI:
YAO Zhicheng,LI Junhua,ZHANG Xingqiang,WANG Zheng.Experimental study on bond-slip behavior between shaped steel and concrete in SRC structures after freezing and thawing[J].Journal of Ningbo University(Natural Science & Engineering Edition),2023,36(1):49-56.DOI:
| Title: | Experimental study on bond-slip behavior between shaped steel and concrete in SRC structures after freezing and thawing |
| 作者: | 姚志成, 李俊华, 张幸锵, 王 峥 |
| Author(s): | YAO Zhicheng, LI Junhua, ZHANG Xingqiang, WANG Zheng |
| 关键词: | 型钢混凝土; 冻融循环; 推出试验; 黏结-滑移本构模型 |
| Keywords: | steel reinforced concrete (SRC); freeze-thaw cycle; push-out test; bond-slip constitutive model |
| 分类号: | TU473 |
| 文献标识码: | A |
| 摘要: | 冻融后型钢与混凝土间的黏结滑移对型钢混凝土结构在冻融环境下的受力性能具有重要影响, 为了研究冻融循环后型钢混凝土的黏结强度与滑移特性, 对9个常温及冻融后的型钢混凝土短柱试件进行推出试验. 结果表明: 冻融循环作用后, 型钢混凝土各特征黏结承载力与特征黏结强度的下降, 而保护层厚度的增加使试件端部与柱身裂缝减少, 试件的承载力提高. 同时冻融前后的型钢混凝土荷载—滑移曲线与黏结—滑移曲线具有大致相同的形状, 并在总结规律的基础上构建了冻融型钢混凝土的黏结-滑移本构模型. 结合本次试验数据与以往常温及冻融后的型钢混凝土有关试验数据, 回归得到冻融型钢混凝土的各黏结强度特征值与相应滑移计算方法, 计算结果与试验数据能较好符合. |
| Abstract: | The bond-slip behavior between shaped steel and concrete after freeze-thaw has an important influence on the mechanical properties of steel reinforced concrete (SRC) structures under freeze-thaw conditions. In order to study the bond strength and slip behavior of SRC members after freezing and thawing, the push-out tests for nine SRC short columns at normal room temperatures and after freeze-thaw were carried out. Test results show that characteristic bond bearing capacity and characteristic bond strength of SRC short columns both descend after freeze-thaw cycles, while the increase of the thickness of cover reduces the cracks at the end of the specimen and the column body, and improves carrying capacity of SRC short columns. At the same time, the load-slip curve and bond-slip curve of SRC short columns before and after freezing and thawing are almost the same, and the bond-slip constitutive model of freeze-thawed SRC members was constructed on the basis of summarizing the laws. From the previous test data of SRC members at normal room temperature and after freezing and thawing, the calculation methods of each characteristic bond strength value and their corresponding slip amount of freeze-thawed SRC members were obtained by regression, and the calculation results were in good agreement with the experimental data. |
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| 备注/Memo: | 收稿日期: 2022－05－04. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/基金项目: 国家自然科学基金（51978344）.第一作者: 姚志成（1995－）, 男, 江西鹰潭人, 在读硕士研究生, 主要研究方向: 组合结构. E-mail: 897106037@qq.com*通信作者: 李俊华（1977－）, 男, 湖南安仁人, 教授, 主要研究方向: 组合结构. E-mail: lijunhua@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
