Analysis of dynamic characteristics and seismic performance for Shengshousi Pagoda

To study the dynamic characteristics and seismic performance of the Shengshousi Pagoda, the present status preserved of the pagoda's structure was investigated on site, and the numerical computation model was established based on the parameters determined by calculated value of the natural vibration frequency of the structure. The responses of acceleration, displacement, story drift and stress were analyzed under three-way seismic wave. The seismic performance of pagoda structure was evaluated according to the calculation results of displacement and stress, and the failure criterion of pagoda materials. The results indicate that the natural frequencies in the east-west are close to that in north-south. The response laws of acceleration, displacement and stress are similar under three-way seismic wave of 8-degree fortification earthquake. Under the frequent earthquakes, the structure of pagoda does not suffer from compression damage; the tensile damage area is located at the bottom floor. Under the fortification and rare earthquakes, significant compression damage area is located at lower floors of the ancient pagoda, the stress concentration occurs around the part of opening, and significant tensile damage occurs. (paper)