Effect of torsional sensitivity on the performance-based seismic design of tall buildings | |
| Author | Thiri San |
| Call Number | AIT Thesis no.ST-20-07 |
| Subject(s) | Torsion balances Earthquake resistant design Tall buildings--Design and construction |
| 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-20-07 |
| Abstract | The issue of accidental torsion in seismic design and analysis was, until recently, a resolved issue. Where linear elastic analysis procedures are used, most building codes require accidental torsion to be included, either by applying equivalent lateral forces at some eccentricity in a static analysis or by shifting the center of mass in dynamic analysis. However, whether accidental torsion should be included in NRHA was extensively debated and most of the study focus on this study is only use low rise steel structure building. This study is focused on accidental torsion effect by using the 55-story (approximately 190m) Reinforced concrete tall building with different torsional irregularity status such as regular and extreme irregular, to evaluate the inelastic torsional response of buildings. The building is checked under the SLE level earthquake to verify the building has susceptible to torsional effects or not. Different tall building guidelines such as PEER/TBI-2017 and LATBSDC-2017 are used to this purpose of torsional sensitivity checking. Then the nonlinear models are created in PERFORM 3D computer program. Four additional models in each building are also modeled by consideration eccentricity in one direction at a time. The mean values of the eleven ground motions are used to evaluate both global and local responses of the structures. The study of the results for different models with different eccentricities clearly shows the effect of inelastic torsion when the comparison between with and without eccentricity models on the response of the structures. The percentage increase has resulted in both global responses and local responses when comparing with and without the eccentricity model, however, both findings remain still within the limit of acceptance Criteria for Maximum Considered Earthquake. |
| Year | 2020 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-20-07 |
| 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;Anwar, Naveed(Co-Chairperson); |
| Examination Committee(s) | Thanakorn Pheeraphan;Punchet Thammarak; |
| Scholarship Donor(s) | Wisit Engineering Consultants Limited, Thailand;Asian Institute of Technology Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2020 |