Site Characterization and Seismic Site Response Study for Bagan Area

Bagan, the cultural heritage city of Myanmar located in the Mandalay region, which is very close to the active Sagaing fault. Most of Bagan's cultural heritage monuments have been damaged due to earthquakes. Therefore, seismic response analysis is needed to evaluate site response characteristics for retrofitting and preservation of the historical monuments in Bagan. Site response studies require the characterization of subsurface materials considering local subsurface profiles of the site. The main target of the present study is site characterization and the estimation of seismic site response for the Bagan monument area. For this purpose, a geophysical survey such as microtremors was carried out to determine the variation of soil profile as well as the characteristics of the soil layers within the study site. Shear wave velocities at the study sites were estimated through the inversion of microtremors H V spectrum. The sites were categorized based on the average shear wave velocity of the overburden soil above the bedrock as Class ‘D' Stiff Soil Profile and Class ‘C' Very Dense Soil and Soft Rock . Equivalent linear site response analysis of layered soil deposits was carried out using DEEPSOIL software which determines peak ground acceleration PGA and response spectrum. The maximum surface PGA was found 0.24g and the maximum acceleration of surface motion is 1.13g at a period of 0.14s. Khin Yupar Maung | Kyaw Kyaw "Site Characterization and Seismic Site Response Study for Bagan Area" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-5 , August 2020, URL: https://www.ijtsrd.com/papers/ijtsrd33202.pdf Paper Url :https://www.ijtsrd.com/engineering/civil-engineering/33202/site-characterization-and-seismic-site-response-study-for-bagan-area/khin-yupar-maung