高拉力鋼筋混凝土滑移剪力設計之研究

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Title:	高拉力鋼筋混凝土滑移剪力設計之研究
Authors:	鄭宇君;CHENG, YU-CHUN
Contributors:	土木工程學系
Keywords:	滑移剪力;斜向彎起筋;塑鉸外移;New RC;plastic hinge;sliding shear slip;bent-up bars
Date:	2020-03-30
Issue Date:	2020-06-05 16:28:29 (UTC+8)
Publisher:	國立中央大學
Abstract:	本研究主要目的，是收集高拉力SD 690鋼筋混凝土梁耐震測試中有產生滑移剪力現象之實驗數據，以探討紐西蘭規範中有關滑移剪力設計之適用性。當中，亦規劃製作兩組2m矩形懸臂梁，一組為原型梁(N1)提供對照，一組(N2)在梁端增設45度彎起鋼筋作塑性鉸外移設計用，主筋皆使用SD690 #8螺紋節鋼筋，梁箍筋使用SD420W #4鋼筋，混凝土強度為60MPa，以利作相關實驗印證。研究結果顯示，N1於DR=5%時在柱面處產生滑移剪力裂縫；而N2局部處因有斜向筋設置，在DR=5%以前未發現滑移剪力裂縫跡象，直至DR=6%時，滑移剪力裂縫會方轉移至無斜向筋之柱面處。再者，紐西蘭NZS3101-2006規範中，有關規定檢核梁滑移剪力設計值，對於New RC來說，是適用但相對保守。 ;The purpose of the study is to investigate the validation on the design for resisting the sliding shear of New RC beams specified in NZS 3101-2006, by means of collecting some data of New RC beam testing performed recently. Meanwhile, this study planned two beams, prototype beam N1 for benchmark and the beam N2 with 45-degree bent-up steel reinforcement designed to relocate the plastic hinge away from column face. The length of the testing cantilever beams is 2 m. SD690 #8 for longitudinal reinforcement and bent-up bar, and SD 420 #4 for transverse reinforcement are used. The concrete strength is 60 MPa. The test results show that beam N1 produces sliding shear cracks at the column face to DR=5%, while N2 suppresses sliding shear cracks due to the additional bent-up bars until the sliding shear cracks relocated at the column face to the later stage of the test DR = 6%. Also, it was found that the design of sliding shear in NZS3101-2006 code is applicable but relatively conservative for the New RC beams.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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