臺灣博碩士論文加值系統

本文探討裝置了鉛心橡皮墊與積層橡皮墊的高速鐵路橋樑﹐在承受列車非等速
力、地震力與溫度變化下橋樑的軸向與垂直變位、橋柱的柱底剪力與彎矩、伸縮縫
處的鋼軌軸應力和隔震支承的反應﹐以研究隔震支承使用於高鐵橋樑的可行性·
本研究主要依賴數值分析﹐分析工具為自行建立的有限元素分析程式·文中推
導使用的分析模式與各種參數﹐分析裝置了隔震支承的高鐵橋樑的反應﹐並與未裝
置隔震支承高鐵橋樑的反應做比較﹐以探討高鐵橋樑隔震支承的可行性·
結果顯示承受列車非等速力、地震力與溫度變化時﹐使用鉛心橡皮墊的高鐵橋
樑之柱底剪力與彎矩皆比使用鉸接錕接者顯著降低﹐而橋面版位移與鋼軌軸向應力
則相差不大﹐故高速鐵路橋樑使用鉛心橡皮墊應屬可行﹐而積層橡皮墊在列車非等
速力作用下有過大的縱向位移﹐使用時應當注意·

This study investigates the axial and vertical displacements of decks,
base shear and moments of piers,axial stresses of rails at expansion joints
and responses of bearings of high-speed railway bridges using lead rubber
bearings and laminated rubber bearings to study the applicability of those
bearings in high-speed railway bridges.
This study relies mainly on numerical analysis. A finite-element analysis
program is developed as the analysis tool. The models adopted and various
parameters used are derived in the paper. The responses of high-speed railway
bridges using bearings are analyzed and are compared to responses of those
that are not equipped with bearings to study the applicability of bearings.
The results show that the base shear and moments of high-speed railway
bridges using lead rubber bearings subjected to acceleration and braking
forces of vehicles,seismic loads and temperature loads are significantly
reduced and displacements of decks and rail stresses remain roughly the same
as those of high-speed railway bridges using hinges and rollers. Application
of lead rubber bearings in high-speed railway bridges is considered applicable.
And the excessive longitudinal displacements of decks using laminated rubber
bearings subjected to acceleration and braking forces should be noted.