岩石隧道二次襯砌之耐震設計考量初探

STUDY ON SEISMIC DESIGN OF SECONDARY LINING OF TUNNEL

回顧二次襯砌的設計理念及現行耐震設計的考量,建立混凝士二次襯砌受地震力之力學行為模式,由本模式來解釋混凝土二次襯砌在地震力作用下的破壞模式,並由可能的破壞模式進一步建立耐震設計之基本需求。同時,由韌性的觀點分析無筋與钢筋混凝土二次襯砌設計的耐震表現,並將利用研究成果針對混凝土二次襯砌進行案例探討,最後根據土木設計極限狀態設計及破壞模式控制2項基本原則,探討二次襯砌設計理念及提出設計建議。

The assumption that secondary lining does not take any loading in the traditional design is not true. So, secondary lining under the stress induced by the seism indeed has tremendous potential danger. The loading pattern of secondary lining in the seism is discussed because the current research on it is not sufficient. And recommendations are given about revising the current design ideas of secondary lining.