Structural health monitoring of : simply supported prestressed concrete bridge girders using ambient thermal strain | |
| Author | Hoang Anh Giang |
| Call Number | AIT Thesis no.ST-04-14 |
| Subject(s) | Bridges, Concrete Concrete beams |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-04-14 |
| Abstract | This thesis deals with a methodology for the use of ambient thermal response as a damage detection tool of structural health monitoring (SHM) of simply supported prestressed concrete bridge girders. Under excitation of solar radiation, thermal response of the examined structure takes place slowly, periodically and the magnitude of response is large enough for measuring by normal testing instrument. These features are convenient for structural health monitoring of bridge structures because they enable (1) to compare response of examined structure in different cycles of almost the same excitation hence occurrence of damage can be detected instantly and (2) to perform monitoring work without any requirement of complicated measuring system. Moreover, monitoring work by using thermal responses can be performed continuously over the lifetime of a bridge without interference to its normal operating. In this study, structural response aspects such as thermal strain of concrete, thermal strain of reinforcements, hogging and axial deformation of a small-scale model of simply supported prestressed concrete bridge girders under natural sunlight exposing condition are monitored by using popular equipment. Preparation, instrumentation as well as progress of official test are described in this report. Experimental results show that damage stage due to cracking of structure can be identified successfully by analyzing thermal response of model to ambient thermal loading and among others responses thermal strain of bottom fiber should be considered as a key aspect for monitoring. However, in this thesis correlation between thermal response and location and magnitude of the damage is not established yet. |
| Year | 2004 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-04-14 |
| 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) | Pennung Warnitchai; |
| Examination Committee(s) | Pichai Nimityongskul ;Kim, Kidu ; |
| Scholarship Donor(s) | Ministry of Education and Training, Vietnam; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2004 |