含圍束繫桿填充型箱型柱之撓曲行為｜國立臺灣科技大學博碩士論文系統

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研究生：	楊佳琦 Rica - Amelia
論文名稱：	含圍束繫桿填充型箱型柱之撓曲行為 Flexural Behavior of Concrete-Filled Steel Box Column with Tie Rods
指導教授：	陳正誠 Cheng-Cheng Chen
口試委員:	陳生金 Sheng-Jin Chen 李台光 Tai-Kuang Li
學位類別：	碩士 Master
系所名稱：	工程學院 - 營建工程系 Department of Civil and Construction Engineering
論文出版年：	2012
畢業學年度：	100
語文別：	英文
論文頁數：	117
中文關鍵詞：	填充型箱型柱、箱型柱、鋼管混凝土柱、填充型複合構件、韌性增強
外文關鍵詞：	concrete-filled box column, box column, concrete-filled tube, filled composite member, ductility enhancement
相關次數：	點閱：230 下載：7
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上一筆

本研究共有九支填充型箱型柱試體，在高軸力作用下進行反覆載重試驗以研究其耐震行為。其中六支試體加裝圍束繫桿來增強柱的韌性。此研究主要在探討高軸力對彎矩強度和撓曲韌性的影響。此研究使用ASTM A572 Gr. 50鋼材以及標稱抗壓強度420 kgf/cm2的混凝土來製作試體，從測試結果顯示當作用於柱之軸力增加至軸向標稱強度的40%時，依照國內SRC規範對填充型箱型柱寬厚比規定的上限來製作填充型箱型柱，會造成填充型箱型柱撓曲韌性不足。使用經過良好設計的圍束繫桿可以有效地提升填充型箱型柱的彎矩容量、塑性轉角容量、韌性和消能能力。本研究更建議出圍束繫桿的設計方法，此方法可以讓圍束繫桿對填充型箱型柱塑鉸區之混凝土提供足夠的圍束力。

In this study, a total of nine large scale concrete-filled box column (CFBC) specimens were tested under cyclic loading to study their seismic behavior. Among the nine specimens, six of them were facilitated with tie rods to enhance the ductility of the columns. The influence of high axial load to the flexural strength and ductility was studied. ASTM A572 Gr. 50 steel and concrete with specified compressive strength of 420 kgf/cm2 were used to fabricate the specimens. Test results showed that the width-to-thickness ratio requirement in the building code may result in insufficient ductility of CFBC columns when axial load applied to the column reaches 40% of the nominal axial strength of the column. Use of properly arranged tie rods is proved to be able to enhance moment capacity, plastic hinge rotation capacity, ductility, and energy dissipation of the CFBCs. A design method of tie rods to provide sufficient confining effect to the CFBC in plastic hinge zone was proposed.

Abstract .............................................................	i
Acknowledgement ...................................................... 	ii
Table of content ..................................................... 	iii
List of tables ....................................................... 	v
List of figures ...................................................... 	vi
Notations ............................................................ 	x
Chapter 1 INTRODUCTION ............................................... 	1
1.1	Background ...................................................	1
1.2	Literature review and previous research ......................	2
1.3	Objectives and scopes ........................................ 	5
1.4	Outline ...................................................... 	6
Chapter 2 EXPERIMENTAL PROGRAM .......................................	7
2.1 Design of test specimens ......................................... 	7
2.2 Material properties ..............................................	8
2.3 Fabrication of specimen ..........................................	9
2.4 Instrumentation ..................................................	10
2.5 Test setup .......................................................	11
2.6 Test procedure ................................................... 	12
Chapter 3 TEST RESULTS ...............................................	13
3.1 General behaviors of test specimens ..............................	13
3.1.1 R-series .......................................................	13
3.1.2 T48-series ..................................................... 	15
3.1.3 T40-series .....................................................	16
3.2 Moment capacity ..................................................  18
3.3 Plastic hinge rotation capacity ..................................	18
3.4 Ductility ratio ..................................................  20
3.5 Energy dissipation ...............................................	20
3.6 Confining stress provided by tie rods ............................ 	21
3.6.1 Design process of tie rods .....................................	21
3.6.2 Required confining stress provided by tie rods .................	22
3.6.3 Proposed design method for tie rods ............................	23
3.6.4 Experimental confining stress provided by tie rods .............	24
Chapter 4 CONCLUSIONS AND SUGGESTIONS ................................ 	25
4.1 Conclusions ......................................................	25
4.2 Suggestions ......................................................	27
References ...........................................................	29
Appendix A ...........................................................	95

                                

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