Seismic perfromance assessment of low-rise buildings subjected to repeated earthquakes | |
| Author | Giri, Suyog |
| Call Number | AIT Thesis no.ST-20-09 |
| Subject(s) | Earthquake hazard analysis Buildings--Earthquake effects Masonry--Earthquake effects |
| 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-20-09 |
| Abstract | Repeated earthquakes are observed in many parts of the world basically from the seismically active zones. Multiple ruptures in the rupture plane occurs due to the unrelieved accumulated strains giving rise to stresses resulting sequential ruptures which decays until the stabilization of the fault system giving rise to multiple earthquakes. These earthquakes can be both independent ones (associated with different/proximate fault rupture) or from the same earthquake resulting in sequences (fore-, main and after shocks). Several major aftershocks followed by the mainshock aggravated seismic damage to the infrastructures and buildings. The role of infill wall in the overall building is complex and seems indeterminant. There can be both negative and positive effects of infill wall in the overall performance of the building depending upon the relative stiffness and strength between the frames and the infill. Particularly two case study buildings i.e. Residential (symmetric distribution of Infill walls) and Commercial (asymmetric distribution of Infill walls) are subjected to repeated earthquakes and the responses are recorded. The repeated ground motions adopted here are real sequences (Mainshock and aftershock) or 1st and 2nd earthquake. The Incremental dynamic analysis is carried out for all the possible ground motions sequence that both the buildings can be subjected to and different scale factors based on damage limit state are analyzed and later combined as repeated earthquake. Basically, residual displacements, inter-story drift values, plastic rotation in beam and column are found to be increasing due to the sequential effects. The accumulated damage in infill walls seems to be increasing due to repeated earthquake phenomena. Between the two case study buildings, the commercial (asymmetric distribution of infill wall) is found to have more effects of repeated earthquake than the residential (symmetric distribution of infill wall) building. Keywords: Repeated earthquake, Mainshock, Aftershock, Incremental Dynamic Analysis, Scaling Factor, Ground motion Combination |
| Year | 2020 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-20-09 |
| 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) | Punchet Thammarak;Anwar, Naveed (Co-Chairperson); |
| Examination Committee(s) | Pennung Warnitchai;Thanakorn Pheeraphan; |
| Scholarship Donor(s) | His Majesty the King’s Scholarships (Thailand); |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2020 |