预应力Fe-SMA主动加固混凝土柱的轴压试验研究  

Axial compression tests of concrete columns actively reinforced by Fe-SMA

作　　者：强旭红[1] 田伟潇 张德林 姜旭[1] 徐春丽 QIANG Xuhong;TIAN Weixiao;ZHANG Delin;JIANG Xu;XU Chunli(College of Civil Engineering,Tongji University,Shanghai 200092,China;Shanghai Baoye Group Corporation,Shanghai 200941,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]上海宝冶集团有限公司,上海200941

出　　处：《中南大学学报(自然科学版)》2024年第12期4519-4531,共13页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(52278206,52278207);国家重点研发计划项目(2020YFD1100403);上海市科技计划项目(20DZ2253000);中央高校基本科研业务费专项资助项目(22120210577)。

摘　　要：为研究混凝土柱等竖向构件的主动加固方法,制作9个素混凝土柱试件和4个钢筋混凝土柱试件,使用国产铁基形状记忆合金(Fe-based shape memory alloy,Fe-SMA)条带对混凝土柱进行预应力主动加固,通过轴压试验研究不同影响因素对于混凝土柱轴压性能的提升效果。研究结果表明:Fe-SMA条带的加固效果显著,能够提升混凝土柱的力学性能,可显著提高混凝土柱的轴向承载力、极限位移、延性,增加Fe-SMA条带数量且对条带进行加热激活后,加固效果更为显著。本文提出的主动加固方法适用于混凝土柱等竖向构件的日常维护加固与防灾韧性提升。In order to propose a suitable reinforcement scheme for vertical components such as concrete column,nine plain concrete column specimens and four reinforced concrete column specimens were made,and the concrete columns were actively reinforced with China-made Fe-SMA strips.The effect of each reinforcement scheme on the axial compression performance of concrete column with different Influencing factors was studied by axial compression tests.The results show that the reinforcement effect of Fe-SMA strips is significant,which can optimize the performance of concrete columns and improve the axial bearing capacity,ultimate displacement and ductility of concrete columns,and the reinforcement effect is more obvious when more Fe-SMA strips are used,and the strips by heating.The active reinforcement method proposed in this paper is suitable for daily maintenance reinforcement and disaster-resistance robustness improvement of vertical components such as concrete columns.

关 键 词：混凝土柱 主动加固 铁基形状记忆合金 轴压试验 力学性能 

分 类 号：TU375[建筑科学—结构工程]