本文主要研究近斷層與地震振動作用下橋梁破壞行為,選定三座橋梁分別為台86線 24號橋、田寮三號橋及炎峰橋,對應地震作用類型分別為近斷層加載速率緩慢、近斷層加載速率快、地震振動加速度歷時,三種類型,模擬分析方式使用SAP2000軟體。台86線 24號橋研究主題可分為微振量測與橋梁復位過程,微振量測識別台86線 24號橋的週期與頻率,可與分析模型作模態分析比較;橋梁復位施作過程,透過頂昇與橫移作業,可了解箱型梁受外力作用下,作彈性回復。田寮三號橋探討近斷層加載速率緩慢與快的模擬、考慮A1橋台伸縮縫修復的分析,分析完成後與實驗結果作比對。炎峰橋探討橋梁受到地震振動加速度歷時,分別為強烈的地表速度脈衝與地表永久位移,其對橋梁破壞模式的差異性。近斷層與地震振動作用之間的差異在於近斷層地震在垂向分量比地震振福大。
To investigate bridge damage under near-fault and the seismic vibration effect in this study. There are three bridges involve Provincial Highway 86,Bridge No.24、Tianliao ,Bridge No.3、Yen-Feng Bridge respectively, which under three types of seismic performances, including the near-fault is acting slow and fast and general ground motion. The use of simulation software is SAP2000.Provincial Highway 86, Bridge No.24 discuss about ambient vibration test and bridge rejection. Provincial Highway 86, Bridge No.24 gain period and frequency which can compared with the model. Bridge rejection can know how the bridge applied external force when the upper structure to do elastic recovery through the lifting and traverse operations. Tianliao, Bridge No3 simulate the near-fault is acting slow and fast、considering A1 abutment joints restoration. The analytical result were compared with the observed data. The objective of Yen-Feng is the bridge suffer from earthquake that has a significant velocity-impulse and a large permanent surface displacement. To know the bridge failure differences between the near-fault earthquake and ground motion. The difference between fault and the seismic vibration that near-fault in vertical component is larger than the seismic performance.