配置雙橢圓鋼板消能器之鋼結構於近斷層載重作用下耐震性能研究

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Title:	配置雙橢圓鋼板消能器之鋼結構於近斷層載重作用下耐震性能研究
Authors:	吳啟祥;WU, CHI-HSIANG
Contributors:	土木工程學系
Keywords:	近斷層載重;雙橢圓鋼板消能器;滑動斜撐;抗彎構架;near-fault effects;dual-oval steel plate damper;sliding brace;moment-resisting frame
Date:	2024-08-20
Issue Date:	2024-10-09 14:52:24 (UTC+8)
Publisher:	國立中央大學
Abstract:	近斷層地震通常帶有含速度脈衝之震波，對結構物之危害遠大於同規模之遠域地震，本研究針對近斷層載重作用下，配置雙橢圓鋼板消能器之斜撐對鋼構架耐震性能提升有效性，進行探討，並以一系列構件及構架試驗，評估其強度、勁度、能量消散與有效阻尼之規模。另為評估此設計在近斷層衝擊效應下的強健性，本研究亦參酌先前研究之成果[21]，比較其在反復載重與近斷層載重下，承載性能之差異。由試驗結果之比較得知，相較於反復載重模式，此設計在近斷層衝擊效應下，仍有穩定之承載能力，且無面外挫屈之行為發生。另由構架承載性能比較，雙橢圓鋼板消能器，既能提升其耐震性能，亦能有效維持主要結構構件之完整性，配置此設計之斜撐鋼構架，其強度能達到抗彎構架之1.83倍以上，累積總消能則可提升1.4倍以上。由此可證，抗彎構架內配置此設計於近斷層載重衝擊下，亦能大幅提升其承載能力與耐震性能，因此為一有效可行之耐震性能提升設計。 ;In the past decade, the disasters caused by several well-known large earthquakes, both domestically and internationally, have drawn attention to the effects of near-fault ground motions. These earthquakes typically involve ground motions with velocity pulses, which damage to structures is bigger than the Far-Fault earthquakes. Therefore, this study focuses on evaluating the feasibility of using a previously designed[21]configuration of double-oval steel plate dampers in buckling-restrained steel frames under near-fault loading protocol. The study aims to define its application feasibility under near-fault effects, observe its structural behavior, and conduct a detailed comparison with configurations under cyclic loading protocol. To assess its feasibility under near-fault effects, this research conducted a series of loading tests on specimens with different cross-sectional depths and eccentricities designed based on previous studies[21]. From the test results, it is evident that compared to cyclic loading patterns, this design maintains stable load-bearing capacity even under near-fault effects, with no occurrence of out-of-plane buckling behavior. Compared to moment-resisting frames, this design not only effectively preserves the integrity of the main structure but also enhances its seismic performance. Its strength can exceed that of moment-resisting frames by more than 1.83 times, and the cumulative energy dissipation can also increase by more than 1.4 times. This indicates that incorporating this design into moment-resisting frames significantly enhances their load-bearing capacity and seismic performance, making it an effective and feasible design solution.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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