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Strand breakage detection in prestressed multi strand anchorage structures using PZT interface technique

Tác giả: Phan Ngoc Tuong Vy, Dang Ngoc Loi
Số trang: Tr. 27 - 35
Tên tạp chí: Khoa học & Công nghệ Đại học Duy Tân
Số phát hành: Số 01(56)
Kiểu tài liệu: Tạp chí trong nước
Nơi lưu trữ: 209 Phan Thanh
Mã phân loại: 690
Ngôn ngữ: Tiếng Anh
Từ khóa: Strand breakage, damage detection, anchorage zone, impedance technique
Chủ đề: Impedance technique
Tóm tắt:

In this paper, the implementation of the PZT interface technique for monitoring strand breakage in a prestressed concrete anchorage zone is presented. First, the fundamental of the PZT interface for impedance monitoring is briefly reviewed. Second, a FE (finite element) analysis of a multi strand concrete anchorage equipped with an array of PZT interfaces is analyzed to obtain impedance signatures under a series of strand breakage events. Last, variations in impedance responses of the PZT array are quantified using root-mean-square-deviation (RMSD), and the linear tomography analysis of impedance’s RMSD indices is utilized to localize damage strands. The result reveals that locations of single and double outer damaged strands are successfully identified, but the location of a center damage strand is not clearly determined in multiple damage cases.

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