en Optimal design Optimal design پژوهشي Research <p dir="ltr">In  this  paper,  a  method  is  presented  for  damage  detection  of  bridges  using  the  Enhanced Colliding Bodies Optimization (ECBO)  utilizing time-domain responses. The finite element modeling of the structure is based on  the equation of motion under the moving load, and the flexural stiffness of the structure is determined by the acceleration responses obtained via sensors placed in different places. Damage detection problem presented in this research is an inverse  problem,  which  is  optimized  by  the  ECBO  algorithm,  and  the  damages  in  the structures  are  fully  detected.  Furthermore,  for  simulating  the  real  situation,  the  effect  of measured noises is considered on the structure, to obtain more accurate results.</p> damage detection, bridge structures, ECBO meta-heuristic algorithm, timedomain, acceleration response 211 226 http://ijoce.iust.ac.ir/browse.php?a_code=A-10-66-95&slc_lang=en&sid=1 M. A. Shayanfar 18003194753284600961 18003194753284600961 Yes A. Kaveh 18003194753284600962 18003194753284600962 No O. Eghlidos 18003194753284600963 18003194753284600963 No B. Mirzaei 18003194753284600964 18003194753284600964 No