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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/78067


    Title: 子計畫:高延展Y型隅撐於鋼結構耐震性能提升研究(II);Performance of Y-Braced Steel Frames Subject to Near-Fault Ground Motion
    Authors: 許協隆
    Contributors: 國立中央大學土木工程學系
    Keywords: Y型隅撐鋼結構;近斷層震波;性能提升;耐震設計;Y-Braced Moment Resisting Frame;Near-Fault Ground Motion;Performance Improvement;Seismic Design
    Date: 2018-12-19
    Issue Date: 2018-12-20 10:54:48 (UTC+8)
    Publisher: 科技部
    Abstract: 鋼結構系統具有良好之韌性,惟其因結構勁度較低,在側力作用下將引致較大位移,就功能設計考量而言,此將限制其應用性。為提升鋼結構承載性能,本研究依先前研究結果,將傳統高延展隅撐加以改善,藉由分段式隅撐與同時具偏心距及摩擦機制之高延展消能鋼板之鉸接組合,形成高延展Y型隅撐,並將之應用於抗彎鋼構架之效能提升設計。由第一年反復載重試驗研究成果顯示,高延展Y型隅撐可支撐之梁範圍大幅增加,相同需求下,梁構件之尺度可有效減小,構架之強度及能量消散能力,均有大幅提升,因此,高延展Y型隅撐應用於結構耐震性能提升之可行性,應為肯定。另就工程設計之耐震需求觀之,由於台灣地區斷層分布區域甚廣,主要都會區大多鄰近斷層,因此,地震發生時,近斷層震波將對建築物產生與反復載重不同之影響,例如更大之速度及更大之位移,近斷層震波效應之重要性,在近年之地震災害中(例如2016年美濃地震),已獲證實。另由國內外歷年之研究發現,相較於反復載重,當承受近斷層震波時,結構須消散更多能量、桿件之塑性區更大、變形能力將有大幅折減、梁之變形亦將大幅增加,因此,為進一步確認高延展Y型隅撐於結構耐震性能提升之有效性,本年度將延續第一年之研究成果,針對前述高延展Y型隅撐構架在近斷層震波下之反應,進行結構試驗。藉試驗結果與第一年反復載重下之結構反應,進行比對,藉以評估此類設計之耐震性能水準,並持續進行設計改善及相關設計參數之優化,以提升設計之可靠性及競爭力。 ;Steel structures possess high strength and significant ductility, thus are effective structural forms for earthquake-resistant designs. Structural designs using special moment resisting frames (SMRF) are usually considered when high ductility is required. In order to improve the seismic performance of the structures, a modified structure adopting knee braces, namely knee-braced moment resisting frame, has been proposed. This study is focused on the performance evaluation of Y-braced moment resisting frames subject to near-fault ground motion. The Y-braced damper is composed of highly ductile energy dissipation plate and knee-braced segments. A series of tests will be conducted on the SMRF and Y-braced moment resisting frames with different arrangement of energy dissipation mechanisms subject to near-fault loading protocol. Test results will be used to evaluate the frame strength, structural stiffness and the structural ductility so that the efficiency of Y-braced damper in seismic performance improvement can be justified.
    Relation: 財團法人國家實驗研究院科技政策研究與資訊中心
    Appears in Collections:[土木工程學系 ] 研究計畫

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