高強度鋼筋混凝土柱與鋼梁接頭耐震行為—五螺箍筋

Seismic Behavior of High-Strength Reinforced Concrete Column and Steel Beam Joints – Five-Spiral transverse reinforcement

賴柏丞(Bo-Cheng Lai)

指導教授 ： 歐昱辰

國立臺灣大學/工學院/土木工程學研究所/碩士(2021年)

https://doi.org/10.6342/NTU202103093

摘要

本研究接續王威儒（2020）「高強度鋼筋混凝土柱與鋼梁貫穿型接頭耐震行為」針對高強度鋼筋混凝土柱與鋼梁結構系統（New RCS）進行研究。首先本研究希望探討國內鋼骨鋼筋混凝土構造規範（SRC）與美國鋼結構設計規範針對梁柱接頭需要剪力強度計算差異對於接頭耐震行為之影響，國內SRC規範計算時沒有考慮應變硬化（hardening）與材料超強（overstrength）。接著本研究期望擴大New RCS使用範圍，使更高強度材料可以使用於此結構系統上，因此本研究試體使用SD690鋼筋製作。最後本研究針對New RCS提出許多細節設計方法，包含延伸蓋板、將鋼筋鎖在鋼梁翼板、將延伸蓋板與承壓面板（FBP）全滲透銲以及鋼箱型接頭，鋼箱型接頭希望能解決兩個剪力方向皆偏心時造成製作困難之問題。於試體設計前，本研究使用有限元素分析軟體Abaqus初步針對研擬之細部設計方法與效果進行探討。
將上述設計參數納入實驗規劃後，本研究總共設計四座New RCS接頭試體，鋼梁使用實際高樓結構實尺寸斷面，鋼筋混凝土柱則進行縮尺，為實尺寸鋼梁與縮尺鋼筋混凝土接頭試驗。四座試體包含兩座梁貫穿型接頭試體，另兩座為鋼箱型接頭。試驗於國家地震中心進行，試驗方法為定軸力推梁不推柱梁端位移控制之反覆載重試驗，希望測試接頭耐震行為。本研究將針對試驗數據整理遲滯迴圈、包絡線、曲率與剪應變、變形分量、塑性轉角以及應變，並檢核接頭行為是否符合台灣與美國之耐震規範。
試驗證明本研究研擬之細部設計具有良好效果，鋼箱型接頭亦具有不錯之耐震行為。最後統整國內外RCS與本研究團隊近年New RCS之研究成果提出國內鋼筋混凝土柱與鋼梁結構系統設計規範與解說。

關鍵字

高強度鋼筋混凝土柱與鋼梁結構系統 ； 五螺箍筋 ； 規範草案

並列摘要

This thesis continues the study “Seismic Behavior of Through-Beam Joints of High-Strength Reinforced Concrete Columns and Steel Beams” (Wei-Ru Wang, 2020) to evaluate the seismic behavior of joints of high-strength reinforced concrete columns and steel beams (New RCS). To calculate shear demand, American “Seismic Provisions for Structural Steel Buildings” accounts for material hardening and overstrength, which is not considered in Taiwan code. Via experimental study, the joint seismic behavior of two different methods of shear demand calculation are compared. The specimens use SD690 steel bars to expand the material application range of New RCS. At the same time, this research proposes different detailed design of joint reinforcement, including extending cover plate, fixed longitudinal reinforcement on the flange, connecting the extending cover plate with face bearing plate(FBP) by complete joint penetration(CJP). In addition, the steel jacket joint is also proposed to solve the complicated construction problem of the interior different-side eccentric joint at two different shear directions. Before designing the specimens, this study uses Abaqus to develop the design methodology and analyze the efficiency of the joint reinforcement.
With the above design considerations, four large-scale New RCS beam-columns joint specimens are designed. Steel beams use the real-size section of the high-rise buildings, and RC columns use reduced-scale section. Four specimens contain two types of joint including through-beam joints and steel jacket joints. In order to simulate the behavior of the moment-resisting frame against lateral force, the tests were conducted in NCREE and adopt the method of fixing the upper and lower ends of the columns and applying duplicated loading on the beam end under fixed axial force. This thesis aims to study the cyclic behavior of the joint by hysteresis loop, curvature and shear strain, deformation component, plastic rotation and strain.
The results of this study show that the through-beam joints with the proposed joint reinforcements and the steel jacket joints have great seismic behavior. In the end, this thesis concludes the existing researches about RCS and New RCS to draw up Taiwan RCS specifications.

並列關鍵字

High-Strength Reinforced Concrete Column and Steel Beam Joints ； Five-Spiral transverse reinforcement ； Specification draft

參考文獻

[1] Cordova, P.P.,＆Deierlein, G.G. (2005). “Validation of the seismic performance of composite RCS frames: Full-scale testing, analytical modeling, and seismic design.” Blume Earthquake Engineering Center Technical Report 155. Stanford Digital Repository.

[2] 王威儒（2020）。「高強度鋼筋混凝土柱與鋼梁貫穿型接頭耐震行為」，國立台灣大學土木工程學研究所碩士論文，歐昱辰教授指導。

[3] 內政部營建署，（2011）。 鋼骨鋼筋混凝土構造設計規範與解說，100年7月1日修訂公布，台北市.

[4] AISC (2010). Seismic Provisions for Structural Steel Buildings, ANSI/AISC 341-10, American Institute of Steel Construction, Chicago, IL.

[5] Deepansh Kathuria, Miyamoto International Inc., Hiroaki Yoshikawa, Shinya Nishimoto, Shinichiro Kawamoto, Taisei Corporation, Gregory Deierlein(2015). “Design of Composite RCS Special Moment Frames.” Blume Earthquake Engineering Center Technical Report 189. Stanford Digital Repository.