Ground motion attenuation relationships based on chinese and japanese strong ground motion data

Student: Longwei Chen
Supervisors: Prof. Ezio Faccioli

ABSTRACT

Ground motion attenuation relationship is the most significant and useful topic in engineering seismology. It provides the background for seismic resistant design, seismic zonation map and seismic hazard analysis. Based on Chinese data ground motion attenuation relationships were scarcely found in public literatures. And most of the previous Chinese attenuation relationships took macroseismic intensity as an objective, also without consideration of site conditions. In this thesis, the Chinese and Japanese strong motion data are collected to develop the seismic parameter, e.g. peak ground motion acceleration or peak ground motion velocity etc., based attenuation relationships and the predictive equations are presented herein.

An important component of seismic hazard analysis is to provide a proper model used for predicting the expected ground motion distribution for a possible earthquake scenario, which should consider the characters of earthquake sources, the paths of wave propagation and local site conditions. In this thesis, 249 earthquake recordings were selected with 3 orthogonal-component seismograms both from Chinese (including Taiwan) and Japanese database. The widely used ground motion attenuation model is adopted to construct the empirical attenuation equations by two-step regression method proposed by Joyner and Boore [1981]. The predicted peak ground parameters are expressed as a function of magnitude, distance (epicentral distance or hypocentral distance) and site category. The model uses a magnitude-independent shape according to geometrical spreading and anelastic attenuation for the attenuation relationships. The final results then are compared with previous attenuation equations obtained by other authors.

You may download a digital version of this MSc dissertation here.