Innovative design and sensing performance of a novel large-strain sensor for prestressed FRP plates

IF 6.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Developments in the Built Environment Pub Date : 2024-11-05 DOI:10.1016/j.dibe.2024.100567

Changyuan Liu , Xin Wang , Xinquan Chang , Zhishen Wu , Huang Huang , Mohammad Noori , Wael A. Altabey

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Abstract

Owing to the low measuring range of traditional fiber Bragg grating (FBG) sensors and the complexity, imprecision, and lack of practicality in existing large-strain sensors, this paper introduces a novel type of large-strain sensor based on pre-relaxation and continuous sensing technology. This design aims to realize the whole-process strain monitoring of prestressed fiber reinforced polymer (FRP) plates. Static tensile tests were conducted on 9 large-strain sensor specimens. The effects of pre-relaxation degree, section number, pre-tension time, and prestressing level were evaluated. The results reveal that, the pre-relaxed sensor, proved its efficacy in capturing the strain pertinent to the post-tensioned operational state of the FRP plate, and a sensing performance of up to 18,923 με can be facilitated and further extended by a pre-relaxation and continuous sensing technique. Moreover, it is recommended that during the fabrication of the large-strain sensor, two pre-tensions be applied, with a prestressing level between 115% and 125% of the pre-relaxation degree.

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用于预应力玻璃钢板的新型大应变传感器的创新设计和传感性能

由于传统的光纤布拉格光栅（FBG）传感器测量范围小，且现有的大应变传感器复杂、不精确、缺乏实用性，本文介绍了一种基于预松弛和连续传感技术的新型大应变传感器。该设计旨在实现对预应力纤维增强聚合物（FRP）板材的全过程应变监测。对 9 个大应变传感器试样进行了静态拉伸试验。评估了预松弛度、截面数、预拉伸时间和预应力水平的影响。结果表明，预松弛传感器在捕捉玻璃钢板后张力工作状态的相关应变方面证明了其有效性，而且通过预松弛和连续传感技术，可以促进并进一步扩展高达 18,923 με 的传感性能。此外，建议在制造大应变传感器时施加两个预张力，预应力水平介于预松弛度的 115% 和 125% 之间。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.