軟弱土層中地下隧道之動力分析

Abstract

地下隧道的動力分析愈來愈重要,而本研究主要分為兩個部份來考慮:第一 個部份為軟弱土層的隧道受到地震影響反應,分橫向和縱向來考慮,是根據 日本學者Aoki的方法再多考慮質量和阻尼因素,可把它模擬成無限長的樑 置於黏彈性基礎上,並且針對台灣的地震來製做應力,應變的反應譜,第二 個部份為軟弱土層的隧道受到外力擾動的反應,也分為橫向和縱向來考慮, 是考慮如地下捷運系統在車站與隧道交接處會產生較大的震動,可把它模 擬成樑端點處受到一諧和外力 Dynamic analysis of underground tunnel is important today. Hence the research is divided into two parts to be discussed. The first part is the dynamic response of tunnel subjected to seismic inputs that contain transverse shear wave and longitudinal p-wave. My methods mainly follow Aoki's model. Furthermore,mass and damper are gained in the equation. Therefore ,the structural model for the whole system becomes an infinite beam on viscous elastic foundation.At the same time,we can make analysis for the ground motiom records in Taiwan . The second part is the dynamic response of tunnel subjected to external force that contains transverse shear wave and longitudinal p-wave. beacause the vibration is big between the tunnel and the station of rapid underground transit system ,We can build the model that the top of the beam is subject to a harmonic external force.