ANALYSIS OF SEISMIC DISASTER OF MASONRY PAGODAS

摘要

Many strong earthquakes happened in the past in China and numerous houses were destructed heavily by earthquakes. As ancient high-rise buildings, the existent masonry pagodas suffered from earthquakes seriously too. They can provide a lot of information to study the historical earthquakes and seismic mechanics of masonry high-rise buildings. In light of seismic calculation by model analysis method, the capacity of Xingjiao Pagoda which is a national cultural relic in Chang'an, Shaanxi Province was discussed. Associated with the results of calculation, seismic disasters of masonry pagodas were analyzed. It can be conclude that the seismic disasters of masonry pagodas can be impacted by the followings: the soil conditions of subsoil, the characters of structures and responses to earthquakes. At the same time, some seismic disasters such as tops of towers falling or flection, tops of towers collapsed by shake and split along middle axis can be explained according to seismic response of masonry pagodas. Therefore, to protect the existent masonry pagodas from earthquakes, seismic check calculations must be involved. Based on results of seismic calculation, some suggesting seismic reinforcement for masonry pagodas are put forward viewed from culture relic protection and seismic engineering.