2016-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/702340摘要：本計畫依105年度自然司防災科技學門地震與地震工程領域公告研究課題4-7近斷層震波對地震工程影響之應用研究：研究內容3. 近斷層震波對土建結構之耐震影響研究進行撰寫。 文獻之研究皆顯示近斷層地震不論是破裂前方效應(Forward directivity)或滑沖效應(Fling step)，其所造成之脈衝通常呈現不對稱性，容易造成橋梁結構震後顯著之殘餘位移，嚴重影響橋梁之安全性與震後服務性。針對此一議題，本研究提出運用自復位RC橋柱於近斷層帶之橋梁，由於自復位RC橋柱具有震後可自復位之特性，可有效降低近斷層橋梁震後顯著殘餘位移之災害，確保震後橋梁之服務性。本計畫預計於第一年度，利用高速反復載重試驗，發展自復位與傳統鋼筋混凝土(RC)橋柱能考慮加載速率之遲滯動力模型。於第二年度，本計畫將利用國震南部分中心之新型振動台，進行自復位RC橋柱之近斷層地震動行為研究，以驗證第一年所研提之自復位RC橋柱遲滯動力模型。本計畫於第三年將繼續利用國震南部分中心新型振動台，進行傳統RC橋柱之近斷層地震動行為研究，驗證第一年所研提之傳統RC橋柱遲滯動力模型，本計畫同時將結合其他子計畫關於橋梁上部結構、支承墊、下部結構、基礎、基礎與土壤互制行為之研究成果，發展適用自復位RC橋柱橋梁之全橋模型，並研提實務設計準則。<br> Abstract: Results of studies by the applicant and literature have shown that both the forward directivity and fling step effects can cause significant residual displacement of bridge structures after earthquakes. This is because of the unsymmetrical nature of the pulse caused by the two effects. To address this issue, this project proposes to use self-centering reinforced concrete (RC) columns in bridges of near fault regions to reduce the potential hazard due to residual displacements, which enhances the serviceability of bridges after earthquakes. In the first year of this project, rate-dependent hysteretic models will be developed for self-centering and conventional RC bridge columns using high-speed cyclic loading tests. In the second and third years, shake table tests of self-centering and conventional RC bridge columns, respectively, will be conducted under near-fault and far-field ground motions using the new shake table of the NCREE south branch to verify the hysteretic models developed in the first year. Meanwhile, this project will integrate the research results of other subprojects on superstructure, bearings, columns, foundations, and soil-structure interactions with the results of this project to develop the whole bridge model for self-centering RC column bridges. Finally, practical design guidelines for self-centering RC column bridges will be developed.近斷層地震自復位橋柱遲滯模型Near faultearthquakeself-centeringbridge columnshysteretic models