| Author | Suwal, Nirmala |
| Call Number | AIT Thesis no.ST-19-13 |
| 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-19-13 |
| Abstract | The basic concept of Base Isolation system is to decouple the seismic excitation force at isolation level prior to transmission in structure above and reduce huge seismic demands and damage cost of property. Studies have revealed the effectiveness of Lead core rubber bearing(LRB) base isolation system in high rise building with shear wall reducing seismic demands, however when structure is analyzed considering three components of ground motions, there is high possibility of overturning of structure resulting the high tensile load in bearing which is highly undesirable as bearing is very soft in tension. The non-linear time history analysis shows that increasing lever arm of the foundation is quite effective in reducing tension in bearing for short period ground motions compared to long period ground motions. Ultimate property diagram, function of compressive stress and shear strain, is used to measure the phenomenon of buckling and the plot shows that bearings are safe from buckling failure. After confirming the allowable tensile state in bearing and performance under different criteria, base isolation system is evaluated for its effectiveness in reducing lateral seismic demands such as story drift, floor acceleration, story shear and story moment. |
| Year | 2019 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-19-13 |
| 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) | Anwar, Naveed;Punchet Thammarak; |
| Scholarship Donor(s) | AIT Alumni SEC’88 - AIT Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2019 |