Author: Arevalo, Aristides D
Title: Nondestructive damage detection in steel frame structures
Degree: M.Sc.
Year: 1993
Subject: Non-destructive testing -- Mathematical models
Non-destructive testing -- Data processing
Building, Iron and steel -- Testing
Steel, Structural -- Testing
Hong Kong Polytechnic -- Dissertations
Department: Department of Civil and Structural Engineering
Pages: ii, 139, [138] leaves : ill. ; 31 cm
Language: English
Abstract: The increasing popularity of steel over traditional reinforced concrete in construction especially in factory and long span structures indicate the need for more inexpensive techniques for monitoring structural integrity of steel frame structures. The present paper investigates the use of measured modal data to detect, locate and quantify damage in plane frame structures. A sensitivity analysis is carried out to assess whether change in the physical parameters or the damage would cause measurable change in the dynamic response of the structure. The changes in the kinetic energy calculated from the measured mode shape and natural frequencies are then used to identify the location of the damage. Damage or change to the physical properties of the elements at the damaged node are quantified using system identification approach. The feasibility of the approach is demonstrated in a case study on a two storey steel frame and is verified using experimental results from a steel portal frame. A damage detection computer package for plane frame structure has been developed and is used in the investigation.
Rights: All rights reserved
Access: restricted access

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