SMAF/PVA混杂纤维增强水泥基复合材料梁自复位与耗能性能试验研究

硅酸盐通报 ›› 2023, Vol. 42 ›› Issue (3): 808-815.

所属专题：水泥混凝土

SMAF/PVA混杂纤维增强水泥基复合材料梁自复位与耗能性能试验研究

向吉朝¹, 杨曌^1,2, 熊浩¹, 汪裕章¹

1.武汉科技大学城市建设学院,武汉 430065;
2.武汉科技大学高性能工程结构研究院,武汉 430065

收稿日期:2022-11-06 修订日期:2022-11-28 出版日期:2023-03-15 发布日期:2023-03-31
通信作者: 杨曌,博士,教授。E-mail:yzwh77@163.com
作者简介:向吉朝(1997—),男,硕士研究生。主要从事纤维增强复合材料及其结构方面的研究。E-mail:1113002723@qq.com
基金资助:
国家自然科学基金(52178158);湖北省自然科学基金(2019CFB540);国家级大学生创新创业训练计划(202110488009)

Self-Centering and Energy Dissipation Performance of SMAF/PVA Hybrid Fiber Reinforced Engineered Cementitious Composite Beams

XIANG Jichao¹, YANG Zhao^1,2, XIONG Hao¹, WANG Yuzhang¹

1. School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China;
2. Institute of High Performance Engineering Structure, Wuhan University of Science and Technology, Wuhan 430065, China

Received:2022-11-06 Revised:2022-11-28 Online:2023-03-15 Published:2023-03-31

摘要/Abstract

摘要： 在聚乙烯醇(PVA)纤维增强水泥基复合材料(ECC)中掺入超弹性形状记忆合金纤维(SMAF),可形成具备良好自复位及耗能性能的新型SMAF-ECC。通过三点弯曲循环加载试验,研究了不同SMAF端头形状和直径下SMAF-ECC梁的自复位和耗能性能。结果表明:增大SMAF直径可有效提高复合梁耗能能力,但对自复位性能影响较小,试验中不同纤维直径造成的挠度自恢复率差异仅为5%;SMAF端头形状对试件自复位及耗能性能影响显著;打结形端头SMAF锚固性能最佳,卸载后试件主裂缝宽度显著减小,挠度自恢复率达到70%以上,试验曲线具有明显的旗帜形耗能特性。

关键词: 形状记忆合金纤维, 超弹性, 相变, 裂缝自闭合, 挠度自恢复, 耗能

Abstract: Superelastic shape memory alloy fiber (SMAF) was added into the polyvinyl alcohol (PVA) fiber reinforced engineered cementitious composites (ECC) to prepare a new SMAF-ECC with good self-centering and energy dissipation performance. The self-centering and energy dissipation performance of SMAF-ECC beams with different SMAF end shapes and diameters were investigated by three-point bending cyclic loading test. The results show that increasing the diameter of SMAF can effectively improve the energy dissipation performance of the specimen, but has little effect on the self-centering performance. The difference of deflection self-recovery rate caused by different fiber diameters in the test is only 5%. The end shape of SMAF has the most significant effect on the self-centering and energy dissipation performance of the specimen, anchoring performance of SMAF with the knotted end is the best. After unloading, the main crack width of the specimen decreases significantly, and the deflection self-recovery rate reaches more than 70%. The test curve has obvious flag-shaped energy dissipation characteristics.

Key words: shape memory alloy fiber, superelasticity, phase change, crack self-closing, deflection self-centering, energy dissipation

中图分类号:

TU352.11

向吉朝, 杨曌, 熊浩, 汪裕章. SMAF/PVA混杂纤维增强水泥基复合材料梁自复位与耗能性能试验研究[J]. 硅酸盐通报, 2023, 42(3): 808-815.

XIANG Jichao, YANG Zhao, XIONG Hao, WANG Yuzhang. Self-Centering and Energy Dissipation Performance of SMAF/PVA Hybrid Fiber Reinforced Engineered Cementitious Composite Beams[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(3): 808-815.

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SMAF/PVA混杂纤维增强水泥基复合材料梁自复位与耗能性能试验研究

Self-Centering and Energy Dissipation Performance of SMAF/PVA Hybrid Fiber Reinforced Engineered Cementitious Composite Beams

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