2014-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/702408摘要：自復位斜撐(SCB)是利用斜撐中之拉力構件束制斜撐中之受壓構件，使斜撐受拉與受壓下均提供自復位能力(在大變形下有回到零殘餘變形的能力)。傳統自復位斜撐之變形能力受制於拉力構件之線彈性應變量，無法使結構體在大變形下使用，主持人自2010年在國科會資助下成功地發展雙核心自復位消能斜撐，增加一核心受壓構件與一組拉力構件，使斜撐之變形量在拉力構件相同應變下可達傳統自復位斜撐變形量之兩倍(或是在相同斜撐變形量下，新型斜撐之拉力構件應變量減少一半)，可確保斜撐在大變形下仍可保有自復位功能。由於雙核心自復位消能斜撐已經實驗證明在軸力達1800 kN (2.5%層間側位移角)下亦可自復位(此為全世界目前經實驗證明成功之最大荷載能力之自復位消能斜撐)，而欲實際應用於結構系統中仍需發展自復位消能斜撐構架設計方法，決定構架耐震需求及進行構架試驗工作等。本計畫接續101年度獲得優秀年輕學者研究計畫補助之一年期「自復位斜撐構架防震策略研究」，預計以三年時間進行結構實驗研究自復位斜撐構架實際耐震行為，第一年預計利用101年度發展的設計方法設計自復位斜撐構架，並進行實尺寸1層樓自復位斜撐構架靜態反覆載重測試，瞭解斜撐與構架相互作用行為;第二年進行實尺寸3層結構構架擬動態試驗，瞭解自復位斜撐構架在真實地震下反應; 第三年重複利用前一年3層樓構架裝置挫屈束制斜撐後進行擬動態試驗，檢驗兩種構架在同樣地震下耐震反應，並與分析結果比較，提供設計準則供學界及工程界參考應用。<br> Abstract: A self-centering brace (SCB) exhibits flag-shaped and recentering hysteretic responses under cyclic loading. A typical SCB cannot be used in a structure with large deformation demands due to the elongation limit of tensioning elements. The applicant successfully developed a novel dual-core self-centering brace in 2010; its axial deformation capacity can be doubled primarily based on steel dual cores and two sets of tensioning elements that are in a parallel arrangement but deform in series in the brace. The proposed brace can exhibit excellent performance up to a target interstory drift of 2.5% with axial force of 1800 kN. To use this new dual-core SCB in structures, many research works are still needed. This proposal is a three-year research program. In the first year, a SCB frame (SCBF) is designed based on the proposed method developed in the previous project which is sponsored by the National Science Council, Taiwan. The one-story SCBF is then cyclically tested to investigate the interaction between the SCB and the frame structure. In the second year, a pseudo-dynamic test is conducted on the full-scale three-story SCBF to examine the seismic performance under real ground motions and accuracy of the computer model. In the third year, a buckling restrained brace (BRB) is installed in the same 3-story frame structure to study the seismic performance between the SCBF and BRBF, especially on the maximum interstory drift, residual drift, and forces in the braced frame. A design guideline for the SCB frame can be provided in this research work.雙核心自復位斜撐自復位斜撐構架靜態反覆載重測試擬動態試驗Dual-Core Self-Centering BraceSelf-Centering Braced Frame TestPseudo-Dynamic Test