title: Damage identification of piles based on vibration characteristics.
abstract: A method of damage identification of piles was established by using vibration characteristics. The approach focused on the application of the element strain energy and sensitive modals. A damage identification equation of piles was deduced using the structural vibration equation. The equation contained three major factors: change rate of element modal strain energy, damage factor of pile, and sensitivity factor of modal damage. The sensitive modals of damage identification were selected by using sensitivity factor of modal damage firstly. Subsequently, the indexes for early-warning of pile damage were established by applying the change rate of strain energy. Then the technology of computational analysis of wavelet transform was used to damage identification for pile. The identification of small damage of pile was completely achieved, including the location of damage and the extent of damage. In the process of identifying the extent of damage of pile, the equation of damage identification was used in many times. Finally, a stadium project was used as an example to demonstrate the effectiveness of the proposed method of damage identification for piles. The correctness and practicability of the proposed method were verified by comparing the results of damage identification with that of low strain test. The research provided a new way for damage identification of piles.
authors.affiliation: Department of Civil Engineering, Shanghai University, Shanghai 200072, China ; School of Architectural Engineering, Quzhou University, Quzhou, Zhejiang 324000, China.
authors.forename: Xiaozhong
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Civil Engineering, Shanghai University, Shanghai 200072, China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Yao
authors.affiliation: School of Architectural Engineering, Quzhou University, Quzhou, Zhejiang 324000, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Chen
authors.affiliation: College of Civil Engineering Kunming, Southwest Forestry University, Yunnan 650000, China.
authors.forename: Dewen
authors.initials: D
authors.lastname: Liu
mesh_terms: D061725:Accelerometry; D004738:Engineering; D020342:Finite Element Analysis; D008962:Models, Theoretical; D013314:Stress, Mechanical; D014732:Vibration