Engineering Practice of Fiber Bragg Grating Retard-Bonded Prestressed Intelligent Tendons
-
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。Abstract: 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.
-
[1] 李佩勋. 缓黏结预应力综合技术的研究和发展[J]. 工业建筑, 2008,38(11):1-5. [2] 马柯佳, 徐建设. 缓黏结预应力技术研究及应用综述[J]. 四川建筑科学研究, 2020, 46(3):58-63. [3] 熊学玉, 肖启晟, 李晓峰. 缓黏结预应力研究综述[J]. 建筑结构, 2018, 48(8):83-90. [4] 尚仁杰, 田钧元, 杨潇. 缓黏结预应力混凝土梁钢绞线黏结性能试验研究[J]. 建筑结构, 2020(2):56-60,66. [5] 高骕, 徐自国, 万怡秀,等. 某超高层混凝土剪力墙结构缓黏结预应力设计[J]. 建筑结构, 2021, 51(11):59-65. [6] 中华人民共和国住房和城乡建设部.缓黏结预应力混凝土结构技术规程:JGJ 387-2017[S] 北京:中国建筑工业出版社,2017. [7] 高晓丁,胥光申,王锦.电阻应变片贴装方位偏差对测量结果的影响[J].西安石油学院学报:自然科学版,2001,16(6):41-43. [8] 高友. 振弦式传感器测量过程中干扰问题的解决[J]. 仪表技术与传感器, 2007(2).54-55. [9] 覃荷瑛,林勇,姜涌, 等.光纤光栅传感器在斜拉桥索力监测中的应用[J].铁道建筑,2020,60(10):51-55. [10] 李梦果, 刘丰荣, 吴尧, 等. 多测点自感知预应力钢绞线在月亮湾大桥中的应用[J]. 科学技术与工程, 2021, 21(29):12610-12615. [11] 赵勇. 光纤光栅及其传感技术[M]. 北京:国防工业出版社, 2007. [12] ZHOU Z, OU J P. Smart FRP-OFGB bars and their application in reinforced concrete beams[C]//Proceedings of the First International Conference on Structural Health Monitoring and Intelligent Structure. 2003:861-866. [13] 覃荷瑛, 霍婷婷, 张贺丽,等. 用于钢绞线大应变测量的光栅传感技术研究[J]. 激光杂志, 2017, 38(10):60-64. [14] 周智, 何建平, 吴源华,等. 土木结构的光纤光栅与布里渊共线测试技术[J]. 土木工程学报, 2010, 43(3):111-118. [15] 兰春光, 刘航, 周智. 基于BOTDA-FBG智能钢绞线的预应力损失监测[J]. 土木工程学报, 2013, 46(9):56-61.
点击查看大图
计量
- 文章访问数: 75
- HTML全文浏览量: 15
- PDF下载量: 3
- 被引次数: 0