• Title, Summary, Keyword: 충전 각형강관-H형강 보 접합부

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Tensile Behavior of Concrete-Filled Square Steel Tubular Column-Beam Flange Connections with Stiffeners (강관 보강형 충전 각형강관 기둥-보 플랜지 접합부의 인장거동에 관한 실험적 연구)

  • Yoo, Yeong Chan;Kang, Hyun Sik;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
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    • v.13 no.1
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    • pp.1-8
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    • 2001
  • The purpose of this study is to examine the utility of concretefilled steel tubular column to H-beam connections with tubular stiffener. As a preliminary step. a tensile experiment was undertaken to scrutinize characteristics of the structural behavior that take place between beam flanges and column with tubular stiffener. A total of 4 types of experimental settings were developed as tabular stiffeners are made up 9, 18, and 27 mm of thickness and 50 and 80 mm of height respetively Along with the overall load subsequently the degree of displacement and strain were recorded. Based on the yield line theory results of this of this study were evaluated and further critically reviewed the applicability of the strength formula. This study found that collapse mechanism was emerged on the beam flange as reinforcing tabular stiffeners Complementary studies of this sort, including numerical analyses should be undertaken in order to develope specific design critera.

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Tensile Behavior Analyses of Tubular Column to H-Beam Connections with T-Stiffeners (외부 T 스티프너를 이용한 각형강관기둥-H 형강보 접합부의 인장거동 해석)

  • Shin, Kyung Jae;Kwon, Young Ran
    • Journal of Korean Society of Steel Construction
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    • v.14 no.1
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    • pp.69-78
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    • 2002
  • This paper describes the analysis results for tensile behavior of tubular column to H-beam connection with T stiffeners. Using the elasto-plastic finite element method, analysis results are compare with experimental results. Parametric analyses with different size of T-stiffener have conducted to understand the stress distribution at the connections. Stress concentration in elastic region and PEEQ distribution in plastic region are plotted for different shape. The results of analysis were applied to design equations and were checked for the applicability of design equations.

Non-linear Analysis of Full Scaled CFT Column to H-Beam Connections with T-Stiffeners (T 스티프너를 이용한 CFT기둥-H 형강보 실대형 접합부의 비선형 해석)

  • Lee, Seung Woo;Kim, Young Joo;Shin, Kyung Jae;Oh, Young Suk;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
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    • v.14 no.6
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    • pp.835-843
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    • 2002
  • The goal of this paper is to understand the stress-transfer mechanism of concrete-filled tubular column to H-beam connection with external T stiffener through the elasto-plastic finite element method and to offer basic data for the design of T stiffener. For the accuracy, analysis results are compared with experimental results. It makes use of several stress and strain indices to understand the stress-transfer mechanism of connection. An alternative plan that decreases the stress concentration of beam flange to horizontal stiffener connection is proposed through the elasto-plastic finite element method.

An experimental study on the Behaviour of Concrete-Filled Square Steel Tubular Column·H-Beam End-plate Connections with Penetrated HT-Bolts (관통형 고력볼트를 사용한 엔드플레이트형식 콘크리트 충전 각형강관 기둥-H형강 보 접합부의 거동에 관한 실험적연구)

  • Kim, Jae Keon;Lee, Myong Jae;Lee, Seung Joon;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
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    • v.10 no.2
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    • pp.211-219
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    • 1998
  • The objective of this study is to investigate the structural behavior of Concrete-Filled Tubular Column H-Beam End-Plate Connections with Penetrated HT-Bolts under monotonic load. Simple bending tests are carried out with 5 kinds of specimens including beam specimen. The parameters of these tests are the thickness (T=22, 26. 30mm) of End-plates and the diameter (M=20, 22mm) of bolts. From the tests, the increasing values of yielding strength and initial stiffness of each specimen were gained as the thickness of End-plates and diameter of bolts are increasing. And the application of Bjorhovde et al and Eurocode 3 classification method by non-dimensional moment-rotation curves to the connections showed that all of them are included in rigid region as far as initial stiffness is concerned and all of them are also rigid as far as ultimate strength.

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Tensile Behavior of CFT Column-to-H beam Connections with External T-shaped Stiffeners (T-스티프너 보강 콘크리트충전 각형강관 기둥-H형강 보 접합부의 인장거동)

  • Kang, Chang Hoon;Shin, Kyung Jae;Oh, Young Suk;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
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    • v.14 no.1
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    • pp.121-130
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    • 2002
  • This paper presents the tensile behavior of a Concrete-Filled Square Steel Tubular (CFT) column to H-beam welded connections. These connections were externally reinforced with T-shaped stiffeners at the junction of CFT column and beam. The tensile loading tests of eighteen tee-joint connections and finite element analysis using ANSYS were carried out. The main parameters of tests are as follows: 1) the thickness of Square Steel Tubular Column : 6 mm, 9 mm, 2) the strength ratios of tensile strength of horizontal stiffeners to tensile strength of beam flange : 70 %, 100 %, 150 %, 3) the strength ratios of shear strength of vertical stiffeners to tensile strength of beam flange : 80 %, 115 %, 160 %. The results of the tests demonstrate that overall behavior and failure modes of all the specimens are governed mainly by the horizontal stiffeners rather than the vertical stiffeners, and the vertical stiffener played only a role in transferring load introduced from beam to column.

Behavior of Concrete-Filled Tube Column to H-Beam Connections with External Stiffeners and Reinforcing Bar (외부스티프너와 철근으로 보강한 CFT 기둥-H형강 보 접합부의 거동)

  • Kang, Chang-Hoon;Shin, Kyung-Jae;Oh, Young-Suk;Moon, Tae-Sup
    • Journal of Korean Society of Steel Construction
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    • v.12 no.1
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    • pp.55-63
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    • 2000
  • This paper is a study on the behavior of Concrete-Filled Square Tubular(CFST) column to H-beam connections reinforced with external stiffeners and reinforcing bar. The cyclic loading tests of 5 test specimens were carried out. The main Parameters are as follows; 1)the length of the stiffener: 200mm, 250mm, 2)the diameter of reinforcing bar: HD16, 19. The results of the researches demonstrate that the increase of the stiffener length was more effective than the increase of the area of reinforcing bar in the point of both strength and stiffness. By reinforcing external stiffeners, stable hysteretic behavior was shown and plastic hinge was formed on the beam flange. Cold-formed tube sections should be used carefully to avoid the welding fracture at the round corners of section, and the proposed welding methods are suitable for this connections.

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Experimental study on the Behavior CFT Column to H-Beam Endplate Connections with Penetrated High Strength Bolts (II) (관통형 고력볼트를 사용한 엔드플레이트형식 콘크리트 충전 각형강관 기둥.H형강 보 접합부의 거동에 관한 실험적 연구 (II))

  • Kim, Jae Keon;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
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    • v.11 no.2
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    • pp.109-116
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    • 1999
  • This paper presents an experimental study on the behavior of CFT Column to H-Beam Endplate Connections with penetrated H/T bolts under monotonic loading. The object of this study is to estimate accurately the effect about the thickness of endplate and the arrangement of H/T bolts which was not got a grip on the results reported in the previous paper. Main parameters are the thickness of endplates (12mm, 16mm) and the arrangemement of H/T bolts (EP1, EP2, EP3 Type). The experimental results compared and analysed. 1) The specimens were classified by Bjorhovde's and EC3's method. 2) A formula to predict the ultimate moment of connection was derived based on the T-stub model, and theoretical value $(_tM_u)$ computed by the formula corresponded to the experimental value $(_eM_u)$.

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The Shear Capacity of CFT Column to H-Beam End plate Connections with Penetrated High-Strength Bolts (관통형 고력볼트를 사용한 엔드플레이트형식 CFT 기둥-H형강 보 접합부의 전단성능)

  • Kim, Young Ju;Kim, Jae Keon;Oh, Young Suk;Moon, Tae Sup
    • Journal of Korean Society of Steel Construction
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    • v.12 no.4
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    • pp.351-362
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    • 2000
  • This paper is to study on the behavior of CFT column to H-beam end plate connections with penetrated high-strength bolts under cyclic load. The main parameters are as follows: 1) the thickness of end plate: 16mm, 22mm and 25mm, 2) the thickness of column : 9mm and 12mm. Comparison and analysis on the test results are performed in accordance with parameters. This study investigates energy absorption capacity of beam-column connections and analyzes the shear strength of joint panel. The shear strength of joint panel is estimated by superimposing the strength of the steel which is based on the von Mises yield criterion and that of the concrete which is used the Strut model to consider the effect of filled concrete.

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An Investigation into the Finite Element Modeling of Connections of Composited H-Beams and Concrete Filled S.H.S Columns Subjected to Compression (축력을 받는 충전콘크리트 각형강관과 콘크리트-H형강 합성보 접합부의 유한요소 모델링에 관한 연구)

  • 이종석;윤영조;김승현
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.230-238
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    • 1996
  • Recently, square hollow section (S.H.S) is frequently used for column and H-section for beam of steel building structures. The connection between S.H.S column and H-beam is found to weaken the rotational restraint of the joint. Several types of detail to overcome the problem have been suggested for the connection between concrete filled S.H.S column and concrete composited H-bean In this paper, modelling technique to monitor the behavior of the connections is proposed. Then, Drucker-Prager yield criteria is introduced to simulate yield behavior of in-fill concrete while Von-Mises was used in earlier works. Gap-elements are also introduced to simulate the interaction between S.H.S columns and the in-fill concrete as in privious papers. axial forces are applied to S.H.S columns and made to vary in intensity and eccentricity.

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A Nonlinear FEM Analysis of Connections Between Concrete Filled Steel Tube Columns and H-Beams (콘크리트충전(充塡) 각형강관(角形鋼管) 기둥과 H형강 보 접합부(接合部)의 비선형 유한요소해석)

  • Yun, Hyun-Do;Kim, Ok-Ryong;Kim, Ok-Ryong;Lee, Hun-Hee
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.7 no.2
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    • pp.209-218
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    • 2003
  • The analytical studies included nonlinear finite element analysis of split-tee connection details subjected to axial load and lateral load. A three-dimensional model of the connections between CFT columns and H-beams has been developed. Both initial geometrical imperfections and residual stresses are taken into consideration. A geometrically nonlinear load-displacement analysis of the structure containing the imperfection is then performed, using the Riks method. Analytical results are compared with existing experimental results. Extensive parametric analyses are carried out to investigate the relation of the connections between CFT columns and H-beam to various parameters such as the axial load, column width-thickness ratio, and split-tee thickness.