Affiliations: College of Civil Engineering, Babol Noshirvani
University of Technology, Babol, Iran | School of Civil Engineering, Iran University of
Science and Technology, Narmak, Tehran, Iran | Centre of Excellence for Fundamental Studies in
Structural Engineering, Iran University of Science and Technology, Narmak,
Tehran, Iran | Department of Civil Engineering, Yazd University,
Yazd, Iran
Note: [] Corresponding author: Gholamreza Ghodrati Amiri, Centre of
Excellence for Fundamental Studies in Structural Engineering, Iran University
of Science and Technology, Narmak, Tehran, Iran. Tel.: +98 21 7724 0399; Fax:
+98 21 7724 0398; E-mail: Ghodrati@iust.ac.ir
Abstract: The present paper aims to explore damage assessment methodology
based on the changes in dynamic parameters properties of vibration of a
structural system. The finite-element model is used to apply at an element
level. Reduction of the element stiffness is considered for structural damage.
A procedure for locating and quantifying damaged areas of the structure based
on the innovative Big Bang-Big Crunch (BB-BC) optimization method is developed
for continuous variable optimization. For verifying the method a number of
damage scenarios for simulated structures have been considered. For the purpose
of damage location and severity assessment the approach is applied in three
examples by using complete and incomplete modal data. The effect of noise on
the accuracy of the results is investigated in some cases. A great unbraced
frame with a lot of damaged element is considered to prove the ability of
proposed method. More over BB-BC optimization method in damage detection is
compared with particle swarm optimizer with passive congregation (PSOPC)
algorithm. This work shows that BB-BC optimization method is a feasible
methodology to detect damage location and severity while introducing numerous
advantages compared to referred method.
