Hazard Risk Level Evaluation for Heritage Sites in Gujarat, India
摘要
Heritage sites in India are well known for brilliant architecture, massive structures and stone carvings which symbolizes its cultural and civilizational aspects. Unfortunately, the construction of the glorious past has suffered degradation due to events such as earthquake, weathering, vandalism and human negligence, etc. Conservation of these structures are of utmost importance with respect to our civilizational and economic value. In the present study, the risk level for 207 heritage sites in Gujarat falling under UNESCO and ASI monuments are evaluated based on the seismic zonation map of India, the seismic hazard and liquefaction hazard study for Gujarat region from literature. The study aims to identify the vulnerable sites by assigning a risk factor to each site with respect to the PGA values of the area based on the three aspects: earthquake zones, probabilistic seismic hazard and liquefaction hazard. The different weightages of these three aspects are accounted and the mean risk for each site is evaluated to prepare the hazard risk map of heritage sites in Gujarat. The future direction on how to account the structural condition assessment of the heritage structure to the evaluated mean risk is also provided by performing condition assessment of UNESCO world heritage site Rani ki Vav.