摘要
为适应轻质铝合金天桥的上部构造的特性,提出一种新型全模块化预制拼装桥墩,并对其力学性能和损伤演化过程开展试验研究。设计了一组新型全模块化装配式桥墩的缩尺试件,进行了低周往复加载试验,评价了新型桥墩的抗震性能指标,为了有效的量化往复荷载下的结构整体损伤情况,试验过程中引入声发射技术进行实时监测。对力、位移曲线和量化后的声发射信号特征进行关联性研究,多方位描述试件的损伤破坏过程。试验结果表明,新型桥墩结构在往复荷载作用下,根据声发射能量的变化和累积,损伤演化过程可分为裂缝发展阶段、强化阶段、耗能阶段和快速破坏阶段。并通过力学数据与声发射活动的对比,证明了声发射技术在结构的损伤演化过程中的状态分析及评估的有效性和准确性,可为工程实践提供可靠依据。
In order to study the seismic performance of new fully modular prefabricated assembled bridge piers and the application of acoustic emission monitoring technology in the condition monitoring of bridge piers,In this paper a set of new assembled bridge pier specimens was designed,a low⁃week reciprocating loading test was carried out,and the acoustic emission technology was adopted to monitor the damage development of the piers in real time in the process of the test.The correlation study of force and displacement curves and the quantified acoustic emission signal characteristics was carried out to describe the damage destruction process of the specimen in multiple aspects.The test results show that the damage evolution process of the new bridge pier structure under reciprocating load can be divided into crack development stage,strengthening stage,energy consumption stage and rapid destruction stage according to the change and accumulation of acoustic emission energy.Through the comparison of mechanical data and acoustic emission activities,the effectiveness and accuracy of acoustic emission technology were proved in the state analysis and assessment of the damage evolution process of the structure,which can provide a reliable basis for engineering practice.
作者
李红豫
汪辰骏
夏署
李丰衍
莫仁德
张璐
LI Hongyu;WANG Chenjun;XIA Shu;LI Fengyan;MO Rende;ZHANG Lu(School of Civil Engineering,Guilin University of Technology,Guilin 541004,China;Nannan Aluminum Engineering Co.,Ltd.,Nanning 530031,China)
出处
《振动与冲击》
北大核心
2025年第4期61-70,164,共11页
Journal of Vibration and Shock
基金
国家自然科学基金(52168068,52068015)
横向科研课题(铝合金人行天桥下部结构模块化设计与应用)(20230057)。
关键词
预制拼装桥墩
声发射
抗震性能
损伤演化
prefabricated assembled bridge piers
acoustic emission
seismic performance
damage evolution
