西北工程技术学报2025，Vol.24Issue(4)：289-297,9.DOI:10.26974/j.cnki.XBGC.2025.04.001
拉挤型GFRP管-混凝土-方钢管双壁空心组合柱损伤实时监测
Real-Time Monitoring of Damage of Pultruded GFRP Tube-Concrete-Square Steel Tube Double-Walled Hollow Composite Columns Under Axial Compression
摘要
Abstract
To achieve real-time monitoring of internal damage in the sandwich concrete of pultruded GFRP tube-concrete-square steel tube double-walled hollow composite columns,the piezoelectric ceramic active sensing technology was employed.Based on the varying strength grades of the sandwich concrete,two pultruded GFRP tube-concrete-square steel tube double-walled hollow composite short column specimens,embedded with smart aggregate(SA),were fabricated.Axial compression tests were conducted to monitor the damage in real time.Through wave analysis,wavelet packet energy,signal amplitude and short-time Fourier transform,the damage status of the specimens was analyzed and quantitatively evaluated.The results show that as the load on the composite column increases,the internal concrete develops cracks and gradually sustains damage and failure.The signal amplitude captured by the piezoelectric smart aggregates gradually diminishes,and the wavelet packet energy correspondingly decreases.An exponential function relationship between the signal amplitude and the load is established.This method provides effective real-time monitoring of damage in the sandwich concrete of such composite columns.关键词
拉挤型GFRP管/双壁空心组合柱/压电智能骨料/损伤监测/小波包能量分析Key words
pultruded GFRP tube/double-walled hollow composite column/piezoelectric smart aggregate/damage monitoring/wavelet packet energy analysis分类
建筑与水利引用本文复制引用
王玉琦,杨文伟,吕博文,王痛快..拉挤型GFRP管-混凝土-方钢管双壁空心组合柱损伤实时监测[J].西北工程技术学报,2025,24(4):289-297,9.基金项目
国家自然科学基金项目(52168025) （52168025）
贺州市科学研究与技术开发计划项目(贺科技2023006) （贺科技2023006）
广西高校中青年教师科研基础能力提升项目(2024KY0724) （2024KY0724）
