| Author | Acharaphan Mingkwan |
| Call Number | AIT Thesis no.ST-18-23 |
| 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-18-23 |
| Abstract | In this paper, several analyses of seismic response of a 5-story reinforced concrete frame building with base isolation system located in Chiang Mai, Thailand is carried out. The base isolation system is designed using 50 identical size lead rubber bearings but different shear modulus of rubber, one bearing for each column. Linear modal and response spectrum, and nonlinear time history analyses were carried out on the numerical model in PERFORM-3D software. Then, the responses of the structure under the earthquake excitation based on Thailand Code, the DPT standard 1302-52, are evaluated in detail. It is found that the dynamic responses of the isolated base structure, comprising the floor acceleration, story drift ratio and story shear force, decreases obviously, up to 50% reduction compare to fixed base structure. Additionally, the structural members in isolated base structure perform the elastic behavior since the earthquake energy is dissipated only by the deformation of isolator devices. Then, the functionality of isolation system is guaranteed by its well performance even under the higher magnitude of earthquake ground motion. The base isolation system dose not only reduce the response of the structure under the earthquake, but the modal properties of the structure also are modified. As the accumulated mass participation ratio of base-isolated structure is greater than 90% of total weight structure within the first mode, so the vibration characteristics of base-isolated structure are predominated by the isolation mode which is the fundamental mode while the structure modes, higher modes, have less influence. |
| Year | 2018 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-18-23 |
| 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) | Punchet Thammarak;Anwar, Naveed; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2018 |