| Author | Chanida Jaipakdee |
| Call Number | AIT Thesis no.ST-18-21 |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Area Name in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-18-21 |
| Abstract | This paper presents the structural health monitoring technique in a scaled model of reinforced concrete core wall for shear-crack detections. The square tube cross-section core wall scaled-physical-model was designed by setting the steel reinforcement ratios within the range, generally found in high-rise buildings, located in earthquake-prone areas. The height of the wall specimen was set to 2 times of the breadth in order to capture damages, which are generally concentrated at the base in the real earthquake-induced damage. The free horizontal vibration from the mass-spring system, installed at the top of the specimen, generated dynamic excitations, which simulate shear force transfers from the truncated higher portion of the high-rise building walls. The vertical and horizontal steel reinforcements were instrumented by metal-foil and piezo-resistive strain gauges, including rosette concrete strain gauges on the surface of the wall after finished casting. Free-decay strain responses were recorded from the wall specimen in undamaged and damaged conditions, and processed in the frequency domain, using peak-picking technique, to establish the modal strain signatures (MSS) for each structural condition. The comparison of MSS from different damage levels was carried out to evaluate the sensitivity of the shear crack detection scheme. A clear change of the strain signature was observed when the shear crack width exceeds 0.1 mm and it was found that both the vertical and horizontal strain gauges are sensitive to the inclined shear crack damages, which justifies the applicability of the shear damage detection scheme for the structural wall health monitoring. |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-18-21 |
| 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) | Punchet Thammarak; |
| Examination Committee(s) | Pennung Warnitchai;Anwar, Naveed; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2018 |