光纤光栅缓黏结预应力智慧筋的工程实践  

Engineering Practice of Fiber Bragg Grating Retard-Bonded Prestressed Intelligent Tendons

作　　者：区彤 蒋方新 兰春光[3] 白石 丘友威 刘雪兵 OU Tong;JIANG Fangxin;LAN Chunguang;BAI Shi;QIU Youwei;LIU Xuebing(Guangdong Architectural Design&Research Institute Co.,Ltd.,Guangzhou 510010,China;China Academy of Building Research Co.,Ltd.,Beijing 100013,China;Beijing Building Construction Research Institute Co.,Ltd.,Beijing 100039,China;Zhixing FRP Reinforcement Nantong Co.,Ltd.,Nantong 226010,China)

机构地区：[1]广东省建筑设计研究院有限公司,广州510010 [2]中国建筑科学研究院有限公司,北京100013 [3]北京市建筑工程研究院有限公司,北京100039 [4]智性纤维复合加固南通有限公司,江苏南通226010

出　　处：《工业建筑》2023年第8期217-221,167,共6页Industrial Construction

基　　金：广东省住建厅科技计划项目(2020-K24-255619);国家自然科学基金青年基金项目(51408030)。

摘　　要：为掌握广东佛山德胜体育中心大跨缓黏结预应力混凝土梁预应力筋的应力变化,采用光纤光栅智慧钢绞线缓黏结预应力智慧筋开展了试验性的监测应用。结果表明:缓黏结智慧筋可在保证施工便利性的同时,可随时获取筋体内预应力大小,准确掌握预应力张拉施工中的预应力损失程度;其监测精度高,能精确反映结构中筋体应力状态伴随施工进程、外界环境、缓凝剂固化作用下的变化,能为缓黏结预应力混凝土工程的设计和施工提供可靠的数据支持。To master stress variations in the prestressed tendons of retard-bonded prestressed concrete beams in the Desheng Sports Center of Foshan,Guangdong,retard-bonded prestressed intelligent tendons made of intelligent steel strands with Fiber Bragg Gratings wrapped with steel strands were applied into the engineering monitoring.The results indicated the retard-bonded prestressed intelligent tendons could ensure convenience of construction and measure stress of tendons at any time,accurately grasp actual prestress loss degrees in prestress tensioning construction.It was of high monitoring accuracy and could accurately reflect the changes in stress of the tendons in the structure with the construction processes,the external environment,and the solidification of adhesives.It provided reliable data support for the design and construction quality of retard-bonded prestressed concrete projects.

关 键 词：光纤光栅 传感技术 缓黏结预应力 智慧筋 预应力混凝土 应力监测 

分 类 号：TU757[建筑科学—建筑技术科学]