不同方向嵌入式PZT传感器对混杂纤维混凝土水化的电磁干扰监测效果

IF 2 Q2 ENGINEERING, MULTIDISCIPLINARY
None Shivangi, Priyanka Singh, Bashar S Mohammed
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引用次数: 0

摘要

摘要本文研究了压电陶瓷钛酸铅锆(PZT)埋置取向对混杂纤维增强(聚丙烯和玻璃纤维)混凝土梁力学性能的影响。在自重条件下对混凝土性能进行了评价,然后用聚丙烯纤维和玻璃纤维对M30级混凝土进行优化后,采用机电阻抗(EMI)技术对其力学性能进行了评价。PZT贴片与结构轴线分别以0°、45°和90°的不同方向嵌入,用于监测RC梁的水化作用。通过养护混合混凝土梁,观察混凝土结构在5、7、14、21和28天后由于热水化引起的刚度变化,并在5、7、14、21和28天后对其进行检查。第五天,梁被简单地支撑并允许在其重量下偏转,并在1到1000 kHz的频率范围内进行热水化测量。类似地,第7、14、21和28天完成。第5天为基线。值得注意的是,放置在45度角的PZT传感器在记录混凝土梁中发生的水化增量变化方面效果最差。采用均方根偏差(RMSD)百分比法对90°方向的变化进行了统计量化,结果表明,90°方向是获得混合配筋梁电导刚度的最优方向。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Efficacy of EMI Monitoring of Embedded PZT Sensors in Different Orientations for Hybrid Fibre Reinforced Concrete Structures Hydration
Abstract In this study, the influence of the orientation of embedded piezoelectric ceramic lead zirconium titanate (PZT) on the mechanical performance of hybrid fiber-reinforced (polypropylene and glass fiber) concrete beams was evaluated. The performance of concrete was evaluated under self-weight, followed by assessing the mechanical property using the electromechanical impedance (EMI) technique after optimization of M30 grade concrete with polypropylene fiber and glass fiber. PZT patches are embedded at different orientations, i.e., 0 deg, 45 deg, and 90 deg, with the axis of the structure for monitoring the hydration of the RC beam. The change in stiffness due to heat hydration in the concrete structure after 5, 7, 14, 21, and 28 days was observed by curing hybrid concrete beams and examining them after 5, 7, 14, 21, and 28 days. On the fifth day, beams were simply supported and allowed to deflect under their weight, and measurements of heat hydration in terms of conductance at frequencies ranging between 1 and 1000 kHz were done. Similarly, days 7, 14, 21, and 28 were done. Day 5 was considered the baseline. It is noted that the PZT sensor placed at an angle of 45 deg is the least effective in recording the incremental changes in hydration that occurred in the concrete beam. The highest quality results were obtained at 90 deg, which is further demonstrated by statistically quantifying the changes using the root-mean-square deviation (RMSD) percentage method and proves to be the most optimized orientation to obtain the stiffness of the hybrid reinforced beam in terms of conductance.
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来源期刊
CiteScore
3.80
自引率
9.10%
发文量
25
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