考慮直接基礎搖擺之不等高橋墩橋梁之實驗與分析

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姓名

李昕蒲(Hsin-Pu Lee) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

考慮直接基礎搖擺之不等高橋墩橋梁之實驗與分析

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摘要(中)

直接基礎橋梁透過搖擺機制可以延長結構振動週期降低地表傳
遞至上部結構之地震力，於大地震中亦可藉由土壤塑性行為吸收地震
能量。橋墩高度改變將影響結構週期，亦將影響動力反應。本研究以
單跨鉸支承橋梁為研究對象，包含兩座等高橋墩試體與一座不等高橋
墩橋梁試體，進行一連串振動台實驗，並利用SAP2000 程式建立數
值模型，探討橋墩高度與不等高橋墩發生基礎搖擺時之動力反應差異，
並比較基礎尺寸及土壤勁度等因素之影響程度。
試驗結果顯示，試體於直接基礎搖擺反應下皆使橋墩頂位移增加，
但可降低傳至上部結構之地震力，而橋墩高度不同亦造成影響。此外
不等高橋墩橋梁試體採用鉸支承，由於橋面板束制兩橋墩之反應，導
致長短橋墩之側向反應差異不大，因此短橋墩底基礎產生較大旋轉角。

摘要(英)

The rocking behavior of bridge with spread foundation considering
the irregular height of piers is investigated in the research. In that purpose,
there are three kinds of the models have been set up, including two equal
height pier of the bridge model and one model combined by two unequal
height piers. This research contains a series of shaking table tests, same
while SAP2000 software is adapted to simulate the test results.
The results show that different height of piers could cause a
discrepancy of the contribution of the other factors to the rocking degree.
But in general, the rocking mechanism leads to increase the displacement
of the top of the piers, but also decrease the acceleration at the same time.

關鍵字(中)

★ 不等高橋墩
★ 直接基礎
★ 搖擺機制
★ 振動台試驗

關鍵字(英)

★ irregular height
★ spread foundation
★ rocking mechanism
★ shaking table test

論文目次

摘要 ...................................................................................................... I
ABSTRACT ............................................................................................... II
致謝 .................................................................................................... III
目錄 ................................................................................................... IV
表目錄 .................................................................................................. VI
圖目錄 ................................................................................................. VII
第一章緒論 .............................................................................................. 1
1.1 研究動機 .................................................................................. 1
1.2 研究目的 .................................................................................. 3
1.3 論文架構 .................................................................................. 4
第二章理論背景與相關文獻 .................................................................. 5
2.1 直接基礎搖擺機制 ................................................................. 5
2.2 相關研究 ................................................................................. 8
2.2.1 搖擺機制 ....................................................................... 8
2.2.2 不等高橋墩橋梁 ........................................................ 13
第三章研究方法 .................................................................................... 15
3.1 實驗模型介紹....................................................................... 15
3.2 實驗規劃 ................................................................................ 16
3.2.1 實驗量測儀器與設備 ................................................. 16
3.2.2 輸入震波 ..................................................................... 17
3.3 實驗試體系統識別 ............................................................... 18
3.4 數值模擬 ................................................................................ 19
3.4.1 橋梁分析模型 ............................................................. 19
3.4.2 土壤彈簧勁度 ............................................................. 20
第四章實驗結果 .................................................................................... 42
4.1 直接基礎搖擺效應 ............................................................... 42
4.2 柱高之影響 ........................................................................... 44
4.3 基礎尺寸之影響 ................................................................... 45
4.4 橡膠勁度之影響 ................................................................... 46
4.5 小結 ........................................................................................ 47
第五章分析結果 .................................................................................. 118
5.1 固定基礎之數值分析與實驗數據比對 ............................ 118
5.2 直接基礎之數值分析與實驗數據比對 ............................ 119
第六章結論與建議 .............................................................................. 200
6.1 結論 ..................................................................................... 200
6.2 建議 ..................................................................................... 202
參考文獻 ................................................................................................. 203

參考文獻

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指導教授

李姿瑩(Tzu-Ying Lee)

審核日期

2019-1-21

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