Suppression of tall building responses from distance large earthquakes by fluid viscous dampers | |
| Author | Khin Myat Kyaw |
| Call Number | AIT Thesis no.ST-14-02 |
| Subject(s) | Tall buildings--Earthquake effects--Evaluation Earthquake resistant design Damping (Mechanics) |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Structural Engineering in School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-14-02 |
| Abstract | Tall Buildings are becoming more popular and being constructed to meet the building requirements during the recent few years as they carry the representative expectations of a city or a country. However, they bring the engineer and the analysist many problems in safely construction and customer satisfaction. If the tall buildings are to be constructed in high seismic and large wind velocity areas, it becomes even more complex to design these buildings. Although the Bangkok city is not in the lists of earthquake-prone areas, the effects of distance large earthquakes are prominent and many tall buildings may be at risk. Even if the earthquake is not too severe, the low frequency waves from earthquake can travel very far. Low frequency waves can generate long seismic waves and can become the problem for long period structures especially for tall buildings. In this study, the seismic performance of the representative building of thirty-nine storey will be evaluated for the large distance earthquakes. The seismic performance will be considered for two types of ground motions intensities; Maximum Considered Earthquake (MCE) and Design Basic Earthquake (DBE) of seismic zone. DBE is the design response spectrum stipulated for Bangkok City and MCE is considered as 1.5 times of DBE. The performance evaluations will be calculated by using the Modal Push Over Analysis (MPA) and then the response will be checked by Nonlinear Time History Analysis (NLTHA) procedures. The seismic evaluation results of maximum displacements, shear and overturning moments for each and every story, levels of damage for every component will be assessed. According to this research, MPA procedure combination with DCM overestimates the responses when compared to NLTHA procedure. Modal pushover analysis procedure has some uncertainty in determining the target displacement of the structure. The tall buildings in Bangkok are damaged from large magnitude long-distant earthquakes effects. It is required to reduce the seismic risk of tall buildings. The large seismic response will be suppressed by adding Fluid Viscous Damper (FVD), a type of velocity dependent energy dissipating devices, in optimal location of the structure. Also, it can be said that the large seismic response of tall building can be suppressed maximum 30 % by adding fluid viscous dampers in optimal location of building. Moreover, most of the earthquake energy is dissipated by the fluid viscous dampers and it can enhance the performance of the building. |
| Year | 2014 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-14-02 |
| 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) | Thannakorn Pheerphan;Punchet Thammarak; |
| Scholarship Donor(s) | Ministry of Foreign Affair, Norway; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2014 |