American Society of Civil Engineers


Damage Identification of Beam-Like Structures through Static Deflection and Natural Frequency as Damage Indicators


by K. Muthumani, (Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India), N. Lakshmanan, (Project Advisor, Director (Retired), CSIR-Structural Engineering Research Centre, Chennai — 600113, India), N. Gopalakrishnan, (Scientist, CSIR- Structural Engineering Research Centre, Chennai — 600113, India), K. Sathishkumar, (Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India), R. Sreekala, (Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India), and G. V. Rama Rao, (Scientist, CSIR-Structural Engineering Research Centre, Chennai — 600113, India)

pp. 87-98, (doi:  http://dx.doi.org/10.1061/41149(393)8)

     Access full text
     Purchase Subscription
     Permissions for Reuse  

Document type: Conference Proceeding Paper
Part of: Indo-U.S. Forensic Practices: Investigation Techniques and Technology
Abstract: The paper proposes a first stage structural health monitoring methodology using natural frequencies and static deflections as damage indicators. The idea is that the first stage monitoring can be done for a large number of bridges and vulnerable structures in a remote manner and the features extracted from the data should help in determining whether any second stage detailed investigation is warranted. Hence, simple, fast and robust strategies are required for estimating the health of the structure using some of the globally available response data. Identification methodology developed in this paper is applicable to distributed smeared damage, which is typical of reinforced concrete structures. Simplified expressions and methodologies are proposed and validated in the paper, numerically and experimentally towards damage estimation.


ASCE Subject Headings:
Natural frequency
Damage
Deflection
Beams
Structural reliability
Bridges
Monitoring