Thông tin chung
  English
  Đề tài NC khoa học
  Bài báo, báo cáo khoa học
  Hướng dẫn Sau đại học
  Sách và giáo trình
  Các học phần và môn giảng dạy
  Giải thưởng khoa học, Phát minh, sáng chế
  Khen thưởng
  Thông tin khác
  Tài liệu tham khảo
  Hiệu chỉnh
 
Số người truy cập: 107,433,707

 Probability-based maintenance modeling and planning for reinforced concrete assets subjected to chloride ingress
Tác giả hoặc Nhóm tác giả: Quynh Chau Truong, Charbel-Pierre El Soueidy, Yue Li, Emilio Bastidas-Arteaga
Nơi đăng: Journal of Building Engineering (SCIE, Q1); Số: 54;Từ->đến trang: 104675;Năm: 2022
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
ABSTRACT
Chloride ingress into concrete is the primary cause of steel corrosion that leads to the deterioration of reinforced concrete (RC) assets and eventual reduction of its service life. The maintenance of RC buildings and structures has become a major concern, and thus the development of an effective maintenance plan is required. This study focuses on deterministic and probabilistic analysis of service life (or repair application time) for RC assets repaired by cover rebuilding techniques in extreme marine environments exposed to chloride attack. A maintenance model is developed, based on the mechanism of chloride transport in repaired concrete elements, that simulates different cover rebuilding methods and strategies. Computationally, the probability-based maintenance model combines the Latin Hypercube technique with finite element and finite difference methods. Probabilistic data for five governing random variables is considered, including diffusion coefficient, surface chloride concentration, concrete cover depth, concrete replacement depth, and critical chloride value for corrosion initiation. Two maintenance strategies are introduced, which can be categorized as corrective and preventive repair strategies. The deterministic study shows that a deeper repair depth leads to fewer repairs and larger repair intervals. The results of the probabilistic assessment reveal that a preventive repair model with regularly scheduled repair intervals efficiently decreases corrosion initiation risks. It was also demonstrated how shorter repair intervals and deeper depths of concrete repair can achieve an acceptable probability of corrosion initiation.
© Đại học Đà Nẵng
 
 
Địa chỉ: 41 Lê Duẩn Thành phố Đà Nẵng
Điện thoại: (84) 0236 3822 041 ; Email: dhdn@ac.udn.vn