Wenchuan 8.0 Magnitude Earthquake Acceleration Peak Attenuation RelationshipBased on A “Mapping Circle” Model
LIU Ping1，LUO Qi-feng2
1. Institute of Structural Engineering and Disaster Reduction，Tongji University，Shanghai 200092，China2. Shanghai Institute of Disaster Prevention and Relief，Tongji University，Shanghai 200092，China
Abstract： At present, there are three ground motion attenuation relationship models which exist some shortage, including the circle model, the fault-rupture model and the ellipsoid model. Based on assuming some linear relation between intensity and ground motion, and compressing the fault-rupture to epicenter, then the intensity isoseismic map would have the character of the circle model. Describe this process through the mapping method of ground motion estimation, and define this model as “mapping circle” model. Taking Wenchuan earthquake for an instance, regress three models respectively, including the circle model, the fault-rupture model, and the “mapping circle” model. The accuracy of the “mapping circle” model is more ideal than others.
2013, Vol. 32 
