高强钢管超高性能混凝土柱地震损伤监测  

Seismic Damage Monitoring of Ultra-high Performance Concrete Filled High Strength Steel Tube

作　　者：战欣霖 方晓蕾 张秭文 杜国锋[1] ZHAN Xinlin;FANG Xiaolei;ZHANG Ziwen;DU Guofeng(School of Urban Construction,Yangtze University,Jingzhou 434023,China;The Third Engineering Branch of MCC Group Shanghai Co Ltd,Shanghai 201900,China)

机构地区：[1]长江大学城市建设学院,湖北荆州434023 [2]五冶集团上海有限公司第三工程分公司,上海201900

出　　处：《土木工程与管理学报》2024年第2期41-47,共7页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(52078052)。

摘　　要：在带肋高强钢管超高性能混凝土柱(UHPCFHSST)内埋设压电智能骨料,钢管外壁粘贴压电陶瓷片,采用主动波动法对UHPCFHSST在往复加载过程中柱端的损伤情况进行监测,通过小波包分析方法对监测数据进行分析,探究循环往复荷载作用下管内核心混凝土损伤和管壁界面剥离损伤过程。结果表明,损伤状态下信号的到达时间比健康状态下的到达时间更晚,且信号的幅值更低。核心混凝土和界面剥离损伤指数随加载等级和加载循环次数的增加而增大,界面剥离损伤先于核心混凝土内部损伤产生。损伤监测结果与试件的滞回曲线、骨架曲线的承载力变化趋势具有较好的一致性。研究结果表明,利用压电智能骨料和压电陶瓷传感器能对管内核心混凝土和管壁届面剥离的损伤过程进行有效监测。In this research,we embedded piezoelectric smart aggregates in Ultra-high Performance Concrete Filled High Strength Steel Tubes(UHPCFHSST)with end ribs.Additionally,piezoelectric ceramic patches were affixed to the external surface of the steel tube.The active wave method was used to monitor the damage at the end of the UHPCFHSST during the reciprocating loading process.The wavelet packet analysis method was employed to analyze the monitoring data,aiming to examine the progression of damage in the core concrete and the occurrence of interface debonding between the tube wall under cyclic reciprocating loading.The results show that the arrival time of the signal in the damaged state is later than in the healthy state,and the amplitude of the signal is lower.Both the damage index of the core concrete and interface debonding increase with escalating loading level and number of loading cycles.Notably,interface debonding transpires prior to internal damage within the core concrete.These damage monitoring results align with the trend of bearing capacity changes in the hysteresis curve and skeleton curve of the specimen.Overall,this study demonstrated the effectiveness of employing piezoelectric smart aggregates and piezoelectric ceramic sensors for monitoring the damage process occurring within concrete-filled steel tubes.

关 键 词：压电陶瓷 智能骨料 钢管混凝土 地震损伤监测 损伤指数 

分 类 号：TN384[电子电信—物理电子学] TU398.9[建筑科学—结构工程]