| Author | Chanpisith, Phal |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School Engineering and Technology
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| Publisher | Asian Institute of Technology |
| Abstract | Mega columns structural system for tall buildings had not been popular for many decades, and suddenly start to reappear until the emergence of supertall building in the form of a composite system. Due to the lack of literature on this structural system, this research will try to fill some gaps of literature by aiming to investigate the seismic performance of 8 mega columns system in high seismic region. The reinforced concrete building consists of 8 mega columns at the perimeter which are tied by the transfer girder and concrete truss, together with the coupled wall in the middle are first designed under wind loading and response spectrum procedure at design basis earthquake (DBE) level. Then, nonlinear response history analysis procedure (NLRHA) will be conducted at MCE level earthquake in order to evaluate its global and local performance by using 3 ground motions. Moreover, one frame core wall building will also be designed only in linear analysis, so that the comparison between the two systems can be made in term of concrete material consumptions, and structural areas per total floor areas. The result of linear analysis demonstrates that the frame core wall system has more weight due to the fact that the system requires more core wall thickness and frame cross-section. However, the global performance between the two buildings is quite comparable. On the other hand, nonlinear analysis result of 8 mega columns system indicates that the response modification factor (R) in which intended to reduce the elastic demand to inelastic design demand in linear analysis is overestimated. Based on the base shear comparison, the designed R factor (Rd) is only more than 1. It is vividly shown that the seismic design demand in the linear analysis was underestimated. The study can be concluded that the performance-based design (PBD) is very important to be carried out to ensure the safety design for tall buildings, and especially any structural system which is excluded from the design code, or in any case that wind design demand governs the seismic design demand in linear analysis. |
| Year | 2019 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Pennung Warnitchai ; |
| Examination Committee(s) | Anwar, Naveed;Punchet Thammarak;Raktipong Sahamitmongkol ; |
| Scholarship Donor(s) | Loom Nam Khong Pijai (Greater Mekong Subregion) Scholarships ; |