| Author | Chalermpol Wongkiattikun |
| Call Number | AIT Thesis no.ST-06-17 |
| Subject(s) | Bridges, Iron and Steel Evaluation
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-06-17 |
| Abstract | Monitoring the present health of old infrastructures are very important issue facing today, as most of the important structures are decades old throughout the world. Among the important infrastructures; the highway bridges take prominent consideration, since the bridges are severely and constantly subjected to various forms of undesirable effects making them most vulnerable for catastrophic failures. The present study focuses on monitoring the global weakening of the supper structure of bridges based on the Global Flexibility Index (GFI) proposed by the authors. GFI is the spectral norm of the modal flexibility matrix obtained with reference to the selected reference points highly sensitive to the critical deformations of the bridge structure. The modal flexibility matrix can be derived from the dynamic responses at these reference points under force vibration test. The same can be computed from finite element analysis condensing all other degrees of freedoms except the degrees of freedoms of these reference points. Laboratory tests were conducted on a model of a real bridge deck to calibrate the computer model by introducing controlled damages on the tested structure. A sharp increase of GFI warns for further investigation for appropriate actions |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-06-17 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Worsak Kanok-Nukulchai;Munasinghe, Sunil; |
| Examination Committee(s) | Pennung Warnitchai;Kato, Yoshitaka;Anwar, Naveed;Anun Patjawit;Songkiat Matupayont; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2006 |