| Author | Chananyoo Maneechan |
| Call Number | AIT Thesis no.ST-18-24 |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-18-24 |
| Abstract | This paper presents the structural health monitoring technique in a scaled model of reinforced concrete core wall for flexural-crack detections. The geometry of specimen is square cross section and it is scaled by scaled-physical-model from survey many real buildings. The prototypes of tall buildings have over 40 stories and locate in earthquake-prone areas. The height of specimen is collected appropriately in order to capture flexural cracks. Model specimen is given frequencies by using exciter of mass-spring-system. This exciter is fixed on top of specimen and can control frequency of specimen by adding or removing steel plates. 120 foil strain gauges is installed where strain is significant such as at base core wall and middle height of core wall, including longitudinal rebars and stirrup. Free-decay strain responses collected by strain gauges are process to frequency domain by using Fast Fourier Transform in undamaged and damaged state. Normalized modal strain (NMS) is generated by peak of detected gauges divided by peak of reference gauge at interested mode. To evaluate damage in specimen is comparison between MSS of undamaged and NMS of damage state. The change of MSS in each state can indicate how severe and where damage is. NMS approach can also show even if small damage (crack is closed by axial force) until serious damage. This technique is justified to detect flexural crack for core wall health monitoring. |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-18-24 |
| 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 |