鋼筋混凝土擴柱補強工法對非韌性梁柱接頭耐震能力提升之探討; Seismic Behavior of Non-ductile Beam-Column Joints Retrofitted by Concrete Jacketing

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Title:	鋼筋混凝土擴柱補強工法對非韌性梁柱接頭耐震能力提升之探討;Seismic Behavior of Non-ductile Beam-Column Joints Retrofitted by Concrete Jacketing
Authors:	何偉智;Wei-Chih Ho
Contributors:	土木工程研究所
Keywords:	梁柱接頭;補強;混凝土擴柱補強工法;植筋;Beam-Column Joints;Retrofit;RC jacketing;Dowel bars
Date:	2003-06-30
Issue Date:	2009-09-18 17:13:03 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本實驗主要在針對非韌性梁柱內接頭採用不同強度混凝土擴柱補強及在接頭區植筋去分析其間之差異，以及以現今接頭剪力強度預測模式之預測值和其試驗結果作一比較，以了解現今理論分析模式之準確性，最後並觀察各擴柱補強試體新舊接頭混凝土層交界面是否有滑動的現象產生。由實驗結果得知，非韌性梁柱內接頭經由混凝土擴柱擴柱工法之後，其強度、勁度及能量消散能力方面，皆表現出比原型試體優越;另外針對不同混凝土強度擴柱補強，在本實驗發現其對於勁度及耐震行為之提升效果不大。在原型試體剪力強度評估模式方面，就以Hakuto之剪力衰減模式評估較為準確，但在評估補強試體時其現行模式分析仍不適合。另外在補強試體中發現其新舊接頭混凝土層交界面的確有滑動現象產生，在植筋過後其交界面滑動現象也有明顯改善。　The purpose of this study is to observe the results for concrete jacketing with the various strength concrete, and for new jacketing with and without dowel bars in the beam-column joint. In comparison with the measured results, the accuracy of the current models can be verified. Also, the bond slip in the interface between new and old concrete of retrofitted specimens with RC jacketing can be observed. 　From the test results, it was found that the retrofitted specimens are superior to the benchmark specimens in strength, stiffness, and energy dissipation. Furthermore, retrofitted specimens that use different strength concrete jacketing were not efficiently enhanced in stiffness and seismic performance. In comparison with analytical results of a prototype interior beam-column joint, Hakuto’s shear degradation model obtained a better accuracy. However, it is not suitable for Hakuto’s shear degradation model and soften strut-and-tie model to evaluate the joint shear strength of the retrofitted specimens with RC jacketing. Finally, the bond slip in the interface between new and old concrete was found in the test. Meanwhile, the dowel bars in the beam-column joint prevent the bond slip.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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