NON LINEAR DYNAMIC ANALYIS OF MASONRY BUILDING (A CASE STUDY OF HOTEL SHANKER)

Abstract

Nepal is highly vulnerable of earthquake as it lies in the tectonic boundary of Indian plate and Euarassian plate. Cultural heritage being the only identity of Nepal having built in the ancient age, medieval age are to be preserved against all the hazards because of their historic and archaeological importance. This is because to transfer the cultures from generation to generation. It is now become very necessary to evaluate the seismic safety of the cultural monuments for the future earthquakes as many of cultural heritage sites have been demolished during 2015 Gorkha earthquake. A review on different masonry typologies, its features, general failure mechanisms, failures as seen in the 2015 Gorkha earthquake are systematically presented. A thorough study and investigation of different numerical methods of analyzing masonry structures are carried in this thesis. The investigation of macro modeling approach of modeling masonry structures is supported through some modelling works. The study has been carried out in Shanker Hotel located in Kathmandu district to determine the vulnerability of the temple by evaluating the seismic capacity of the temple. For this study, three dimensional models have been developed using shell element to investigate the a) the responses, displacements, stresses of the structure ,b) different dynamic properties of the masonry temple, c) different failure modes of the masonry temple and d) weak elements of the temple under earthquake excitation. Seismic capacity evaluation is performed using the seismic co-efficient method and response spectrum method. The result shows that the time period of this temple is 0.474s. The most critical parts are the piers between the openings. Most of the failure modes are associated with tensile stresses for dynamic analysis and for static analysis, it is compressive and tensile both.