Effect of boundary zone reinforcement in shear walls on the seismic performance of tall buildings | |
| Author | Rayamajhi, Bibhav |
| Call Number | AIT Thesis no.ST-24-21 |
| Subject(s) | Tall buildings--Earthquake resistant design Buildings, Reinforced concrete Shear walls |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | As cities expand, the construction of high-rise structures has become prevalent, necessitating effective strategies to resist lateral loads induced by wind and earthquakes. RC shear walls are a popular choice of construction for these high-rise buildings because of their ability to resist and provide stiffness against lateral loads such as wind or earthquakes. They are effective in controlling lateral drift and displacement and offer sufficient ductility to prevent brittle failure during earthquakes. However, despite its importance, due to experimental constraints and computational difficulties, extensive research has not been done in the shear walls, especially in tall buildings. In this research, RSA and NLRHA study is done in a 40-story building in ETABS software to study the impact in the seismic performance of the building by increasing the reinforcement in boundary zones of shear walls. 4 types of models are used in this study and are named M1, M2, M3 and M4, where M1 is the baseline model and the rest have 10%, 20% and 30% reinforcement increment in the boundary zones, while maintaining the overall quantity of reinforcement in the shear walls the same. All other parameters are unchanged and NLRHA is performed to capture both the responses. After obtaining the global and local responses, the baseline model M1 is compared with M2, M3 and M4, and it is found that changes in rebar at boundary zones have considerable impacts on several global as well as local responses of the building. The global responses such as lateral displacement, transient drift and residual drift, and the local responses such as shear demands, axial strain and overturning moment in shear walls, link beam rotation, column axial force and column moment have all decreased with the increase in rebar percentage at the boundary zones. |
| Year | 2024 |
| 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;Anwar, Naveed (Co-chairperson); |
| Examination Committee(s) | Krishna, Chaitanya;Punchet Thammarak; |
| Scholarship Donor(s) | Prof. Jae-Soo Shim Scholarship;AIT Scholarship |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2024 |