• 作者： 陳培麟
• 作者服務機構： 國立成功大學土木工程系
• 中文摘要： 本文主要在探討盆形介質對地震波之局部效應。首先，我們將一九八一年一月二十九日在中正紀念堂所得之地震加速度記錄當作波源之加速度而置於半無限空間中，然後，應用一般化射線法以求得射線積分式，之後，再以著名之Cagniard法來反算時間域之反應。而從所得之結果得知，由於多次反射，震幅衰滅得非常快，所以在實際之計 算上，我們僅須考慮最先到達的少數幾個射線所導致的反應即可。同時，由推導之過程，我們亦得知，對於更複雜 之邊界條件之波傳問題，亦可應用一般化射線法來求得其解。
• 英文摘要： The local effect of a basin-type medium due to seismic waves is investigated in this study. To obtain the responses, a line source simulated by the acceleration record of a January 29, 1981 earthquake obtained at Chung-Ching Memorial Hall is located in the half space. Based on the generalized ray theory, the ray integral is constructed and is inversed by the well-known Cagniard method. The responses on the surface for distinct sources are then obtained and shown in sketches. It is found that only a small number of rays need to be considered in the calculation of responses. Furthermore, it can be observed from the derivation procedures that generalized ray theory can be used to investigate wave propagation problems of more complicated boundary conditions.
• 中文關鍵字： transient SH wave; basin-type layered medium; generalized ray theory; Cagniard method
• 英文關鍵字： --