Estimation of seismic structural responses through accelerometer measurement : an experimental and numerical study | |
| Author | Fathisepahvand, Mojtaba |
| Call Number | AIT Thesis no.ST-22-06 |
| Subject(s) | Structural health monitoring Structural analysis (Engineering) Earthquake engineering |
| 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 |
| Abstract | By using the accelerometer measurement after a seismic event, we can use them to understand the health of the structure meaning that we can acquire whether this structure could be used after the seismic event, or does it need any repairs. This will help us not only save the structure but also save lives and huge financial costs in the future. The acceleration sensor could be installed on all the floors of the structure or it could be installed on just a few floors which is more practical so an approach based on the modal decomposition technique by orthogonal filter approach with a limited number of acceleration sensors. In this study an experimental model: MDOF 2D steel moment resisting frame was designed by use of numerous NLTHA for estimation of responses based on the modal decomposition technique by using an orthogonal filter approach with a limited number of acceleration sensors from elastic to the nonlinear range and compare the prediction with the measurement of strain gauges. This is the first time this approach has been tested experimentally in the non-linear range, where the AIT shaking table was used to simulate earthquakes. The time history analysis of this study is also used in this study which is based on the modal decomposition technique by using MRHA for the linear range and the UMRHA for the nonlinear range. From the orthogonal filter and the time history analysis, we can obtain the same results such as modal acceleration and modal displacement by use of a developed accurate FEM model we are able to estimate different kinds of responses rapidly. The result for testing the approach was compared with strain gauges attached to the model, as well as the time history analysis which it was found that the estimated strain results from the approach are very close to the strain gauge measurements. |
| Year | 2022 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| 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) | Krishna, Chaitanya;Punchet Thammarak |
| Scholarship Donor(s) | Asian Institute of Technology Scholarships |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2022 |