[1]肖同亮,邱洪兴,孙兰香.钢-玄武岩纤维复合筋拉压力学性能试验研究[J].东南大学学报(自然科学版),2014,44(4):805-810.[doi:10.3969/j.issn.1001-0505.2014.04.022]
 Xiao Tongliang,Qiu Hongxing,Sun Lanxiang.Experimental and theory study on tensile and compression mechanical properties of steel-basalt fiber composite bars[J].Journal of Southeast University (Natural Science Edition),2014,44(4):805-810.[doi:10.3969/j.issn.1001-0505.2014.04.022]
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钢-玄武岩纤维复合筋拉压力学性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
44
期数:
2014年第4期
页码:
805-810
栏目:
土木工程
出版日期:
2014-07-16

文章信息/Info

Title:
Experimental and theory study on tensile and compression mechanical properties of steel-basalt fiber composite bars
作者:
肖同亮邱洪兴孙兰香
东南大学混凝土及预应力混凝土结构教育部重点实验室, 南京 210096
Author(s):
Xiao Tongliang Qiu Hongxing Sun Lanxiang
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China
关键词:
钢-玄武岩纤维复合筋 材性试验 二次刚度 滞回规则
Keywords:
steel-basalt fiber composite bar material mechanical test post-yield stiffness hysteretic behavior
分类号:
TU375.3
DOI:
10.3969/j.issn.1001-0505.2014.04.022
摘要:
为了研究钢-玄武岩纤维复合筋的基本力学特性,开展了不同纤维含量钢-玄武岩纤维复合筋的拉伸试验、压缩试验及其机理研究.试验结果表明:纤维含量对筋材强屈比有较大影响,内芯钢筋在屈服前能够较好地与外包纤维共同工作,屈服后与外包纤维产生局部滑移,出现应变滞后现象,卸载后存在内芯钢筋受压与纤维受拉的自平衡现象, 且随着塑性变形的增大,卸载刚度逐渐减小;受压荷载主要由内芯钢筋承担,纤维胶层对受压影响较小.针对钢-玄武岩纤维复合筋拉压不对称的特性,提出了钢-玄武岩纤维复合筋骨架曲线与滞回规则,并给出了卸载模量退化系数的建议值,为该类筋材在混凝土结构中的设计及有限元数值模拟提供了理论依据.
Abstract:
In order to study the basic mechanical properties of steel-basalt fiber composite bars(SBFCBs), a series of tension and compression tests of SBFCBs with different fiber contents and the corresponding theoretical research are carried out. The test results show that the fiber content has a great influence on the ratio of the ultimate strength to the yield strength. Before yielding, the inner steel can work together well with the outside fiber. After yielding, the partial slip between the inner steel and the outside fiber induces strain delay phenomenon. After unloading, the self-balancing phenomenon accompanied by compressed steel and stretched fiber occurs. With the increase of plastic deformation, the unloading stiffness decreases gradually. The compressive load is mainly sustained by the steel bars, while the fiber has little influence on the compression. Aiming at the asymmetry mechanical properties between tension and compression, the skeleton curve and the hysteresis rule of the SBFCBs are proposed, and the values of the unload modulus degradation coefficient are recommended, providing the theories for the use of SBFCBs in concrete structure design and finite element numerical simulation.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期: 2013-12-06.
作者简介: 肖同亮(1982—),男,博士生,讲师;邱洪兴(联系人),男,博士,教授,博士生导师,qiuhx@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51078077)、 “十二五”国家科技支撑计划资助项目(2012BAJ14B02).
引用本文: 肖同亮,邱洪兴,孙兰香.钢-玄武岩纤维复合筋拉压力学性能试验研究[J].东南大学学报:自然科学版,2014,44(4):805-810. [doi:10.3969/j.issn.1001-0505.2014.04.022]
更新日期/Last Update: 2014-07-20