2012-08-012024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/682736摘要：自復位消能斜撐(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1200 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。本研究計畫預計進行二年，第一年發展自復位斜撐構架性能設計法，並進行構架非線性動力歷時分析瞭解耐震需求，第二年預計利用此設計方法設計自復位斜撐構架進行實尺寸結構構架擬動態試驗。除了測試自復位斜撐構架的行為表現之外，同時利用此構架試驗來驗證接合板的設計方式，並也將做為有限元素的校準模型，並同時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 new 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 1200 kN. To use this new dual-core SCB in structures, many research works are still needed. This proposal is a two-year research program. In the first year, a performance-based design method is developed for the new SCB frame. Many SCB frames are designed and analyzed with earthquake records to determine their seismic demands at the designed-based and maximum-considered earthquake levels. In the second year, a pseudo-dynamic test is conducted on the full-scale SCB frame to examine the seismic performance, connection details, gusset stability, and accuracy of the computer model. A design guideline for the SCB frame can be provided in this research work.雙核心自復位斜撐A Dual-Core Self-Centering Brace