- 摘 要
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（1 蘭州理工大學防震減災研究所， 蘭州 730050；2 蘭州理工大學甘肅省減震隔震國際合作研究基地， 蘭州 730050）
［摘要］針對套筒灌漿質量缺陷，提出一種基于壓電波動法的套筒灌漿質量缺陷監(jiān)測方法。設計并制作了一組存在不同類型灌漿質量缺陷的灌漿套筒，利用壓電陶瓷功能元展開灌漿質量缺陷識別監(jiān)測試驗。以傳感器接收信號幅值和能量值兩種信號特征參量為研究對象，提出基于監(jiān)測信號幅值和小波包能量值的變異系數(shù)缺陷識別指標CV和ECV。結果表明：有、無灌漿質量缺陷狀態(tài)下兩種缺陷識別指標都表現(xiàn)出明顯的差異性，提出的兩種缺陷識別指標對套筒灌漿質量缺陷都具有良好的識別性和敏感性，判別結果與事先模擬的套筒灌漿質量缺陷情況相吻合。最后，利用提出的灌漿質量缺陷監(jiān)測方法對一裝配式剪力墻進行套筒灌漿質量監(jiān)測評估，并對評估結果進行實際剖切驗證，證明了本文提出的利用壓電陶瓷的灌漿質量缺陷監(jiān)測方法在實際結構中的適用性。
［關鍵詞］套筒灌漿質量缺陷；缺陷識別；壓電陶瓷；波動法；小波包能量
中圖分類號：TN384文獻標識碼：A文章編號：1002-848X(2021)09-0049-07
Research on recognition of sleeve grouting quality defects based on piezoelectric wave method
DU Yongfeng1,2, DU Jinfu1
(1 Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou 730050, China; 2 International Research Base on Seismic Mitigation and Isolation of Gansu Province, Lanzhou University of Technology, Lanzhou 730050, China)
Abstract: Aiming at the quality defects of sleeve grouting, a method for monitoring sleeve grouting quality defects based on piezoelectric wave method was proposed. A group of grouting sleeves with different types of grouting quality defects were designed and fabricated, and the identification and monitoring tests of grouting quality defects were carried out using piezoelectric ceramic functional elements. Taking two signal characteristic parameters of the sensor received signal amplitude and energy value as the research object, the coefficient of variation defect identification indicators CV and ECV based on the monitored signal amplitude and wavelet packet energy value were proposed. The results show that, with or without grouting quality defects, the two defect identification indicators show obvious differences, indicating that the two defect identification indicators proposed have good recognition and sensitivity to the sleeve grouting quality defects, and the identification results are consistent with the previously simulated quality defects of sleeve grouting. Finally, the proposed grouting quality defect monitoring method was used to monitor and evaluate the quality of sleeve grouting for an assembled shear wall, and the evaluation results were verified by slitting sleeves, which proves that the grouting quality defect monitoring method using piezoelectric ceramics proposed in this paper is feasible in the actual structure.
Keywords:sleeve grouting quality defects;defect identification;piezoelectric ceramics;wave method;wavelet packet energy
*國家自然科學基金項目（51778276），甘肅省重點研發(fā)計劃項目（18YF1FA067）。
作者簡介：杜永峰，博士，教授，博士生導師，Email:dooyf@sohu.com。
