摘要
对9个CFRP约束的圆铝合金管混凝土(CFRP-CFACT)短柱和3个圆铝合金管混凝土(CFACT)短柱进行了轴压试验,研究了不同套箍率和CFRP的粘结层数对CFRP-CFACT短柱轴压性能的影响,得到了CFACT短柱和CFRP-CFACT短柱的典型破坏模式、轴向荷载-位移曲线和荷载-应变曲线。试验结果表明,与CFACT试件相比,CFRP能够有效提高CFACT试件的刚度和极限承载力,并且随着CFRP布粘结的层数增加,也提高了CFACT短柱的极限承载力与变形能力。最后,根据已有的CFRP约束圆钢管混凝土(CFRP-CFSCT)短柱的轴压极限承载力计算公式和试验结果,采用线性回归法给出了CFRP-CFACT短柱的轴压承载力计算公式,该计算公式的计算结果与试验实测结果吻合良好。
Axial compression tests were carried out on 9 CFRP-confined circular CFRP-CFACT short columns and 3circular CFACT short columns, and different hooping rates and bonding layers of CFRP were investigated. The typical failure modes, load-displacement curves, and load-strain curves of CFACT and CFRP-CFACT stubs were obtained. The test results show that compared with the CFACT specimen, the rigidity and ultimate strength of the CFRP-CFACT sample were significantly improved, and with the increase in the number of CFRP fabric layers, the final tensile strength,and the tensile strength of the short CFACT column were improved. Finally, combined with the existing CFRPconstrained circular concrete-filled steel tubular(CFRP-CFSCT) short column calculation formula and test results, the axial compression ultimate bearing capacity calculation formula of CFRP-CFACT short column is proposed by linear regression. The calculation formula is in good agreement with the experimental results.
作者
杨虓宇
蒋华
YANG Xiaoyu;JIANG Hua(College of Architecture and Civil Engineering,Xi Hua University,Chengdu 610039,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期1362-1368,共7页
Building Structure
作者简介
第一作者:杨虓宇,硕士研究生,主要从事桥梁工程相关研究,Email:1076806489@qq.com。