Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 25, Number 1, January10 2007 , pages 39-52 DOI: https://doi.org/10.12989/sem.2007.25.1.039 |
|
|
|
Experimental study on identification of stiffness change in a concrete frame experiencing damage and retrofit |
||
X. T. Zhou, J. M. Ko and Y. Q. Ni
|
||
| Abstract | ||
| This paper describes an experimental study on structural health monitoring of a 1:3-scaled one-story concrete frame subjected to seismic damage and retrofit. The structure is tested on a shaking table by exerting successively enhanced earthquake excitations until severe damage, and then retrofitted using fiber-reinforced polymers (FRP). The modal properties of the tested structure at trifling, moderate, severe damage and strengthening stages are measured by subjecting it to a small-amplitude white-noise excitation after each earthquake attack. Making use of the measured global modal frequencies and a validated finite element model of the tested structure, a neural network method is developed to quantitatively identify the stiffness reduction due to damage and the stiffness enhancement due to strengthening. The identification results are compared with | ||
| Key Words | ||
| concrete frame; shaking table test; seismic damage; retrofit; structural stiffness identification; neural network. | ||
| Address | ||
| Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong | ||