• Title, Summary, Keyword: 합성슬래브

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Influence of Cracks in Precast Concrete Deck on the Flexural Strength of Composite Half PC Slab (하프PC 슬래브에 발생한 균열이 합성 슬래브의 휨 내력에 미치는 영향에 관한 실험적 연구)

  • Seo, Tae-Seok;Lee, Moon-Sung;Choi, Chang-Sik
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.13 no.2
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    • pp.199-205
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    • 2009
  • Recently, as the concern for the development of a construction method for an environmental protection and for tall building is increasing, the use of the half precast concrete(PC) slab that has the solution of environmental problems and the advantage such as reduction of construction period is being demanded. However, there is shortcoming that the crack can occur easily while constructing, and these cracks can have a bad influence upon the structural performance of PC composite slab. However, there is little studies on the influence of these cracks on the structural performance of composite PC slab. In this study, the specimen caused the crack before pouring topping concrete in the half PC slab and the PC composite slab without the cracks were produced to investigate the structural performance of PC composite slab with crack.

Study on the Composite Capacity of Composite Slabs by Deckplate Section Shapes (데크플레이트 단면형상에 따른 합성슬래브의 합성능력에 관한 연구)

  • Ju, Gi-Su;Park, Sung-Moo
    • Journal of Korean Society of Steel Construction
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    • v.12 no.6
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    • pp.671-680
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    • 2000
  • This paper provides the results of the study on the structural behavior of the composite metal deck slab system. The experimental study on composite slabs with trapezoidal and inverse-triangle-top-flange deckplate result, it was found that the geometry of the cross-section was more important than any other factors to ensure the composite action of deck slabs. Hence the inverse-triangle-top-flange of closed box was more effective on the shear slip and deflection than the trapezoidal deck of open shape. These results show that the continuing development of composite deck plate must consider importantly the geometry of the deck. The experimental results were compared with established formulas and were analysed to advance a theory on composite slabs using deckplates.

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An Analytical Study on the Structural Behavior of the Composite Slab with New-Shaped Deckplate (신형상의 합성용 데크플레이트를 사용한 합성슬래브의 구조적 거동에 관한 해석적 연구)

  • Moon, Tae Sup;Bae, Jong Woo
    • Journal of Korean Society of Steel Construction
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    • v.11 no.2
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    • pp.181-190
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    • 1999
  • The objective of this study is to investigate the structural behavior of the composite slabs with the new-shaped deckplate. In order to examine the deckplate as structural members, the composite slabs with new-shaped deckplate are compared and verified with the international design codes, and the simple inertia-moment equation of the composite slabs is suggested from the regression analysis of the results of the experiments. Besides, the finite element analysis was added on the purpose of the observation of structural behavior of the section items such as the Locking rib and the Dovetail. 36 experiments of composite slabs were performed with two new-type deckplates. And the finite-element analysis was performed by ABAQUS package with the function of the 3-dimension solid modeling.

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An Experimental Study on the Flexural Behavior of Composite Steel Deck Slab with Bored Openings (천공 개구부가 있는 합성슬래브의 휨거동에 관한 실험적 연구)

  • Eom, Chul Hwan;Kim, Hee Cheul;Park, Jin Young
    • Journal of Korean Society of Steel Construction
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    • v.18 no.5
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    • pp.607-614
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    • 2006
  • The composite metal deck plate system has been widely used of late for office structures. However, composite floor decks are bored imprudently for installation in building equipment. In this study, experimental investigations of bored composite steel deck slabs were performed to evaluate the flexural capacity of each specimen. The variables set were the shapes and positions of the openings in the composite slabs. The results were analyzed in the form of load-displacement graphs and with respect to the ductility and energy dissipation capacity ofeach specimen to evaluate its structural capacity.

Experimental Study on Flexural Performance of Composite Slabs Reinforced with GFRP-Deckplate (GFRP-데크플레이트로 보강한 합성 슬래브의 휨성능 평가에 관한 실험적 연구)

  • Choi, Bong-Seob
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.10 no.1
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    • pp.165-170
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    • 2009
  • In this study, the flexural experiment was conducted to propose the one-way composite slab system composed of concrete and GFRP-Deckplate by comparing with the composite deck slab system with bar-mesh As a result of experiment, the specimens of the proposed GFRP-Deck composite slab were better than the specimens for comparison in the flexural performance. It is effective for the building structures exposed to air pollution or salt.

Composite Beam Element for Nonlinear Seismic Analysis of Steel Frames (강재 골조의 비선형 지진해석을 위한 합성 보 요소)

  • Kim, Kee Dong;Ko, Man Gi;Yi, Gyu Sei;Hwang, Byoung Kuk
    • Journal of Korean Society of Steel Construction
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    • v.14 no.5
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    • pp.577-591
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    • 2002
  • This study presented a composite beam element for modeling the inelastic behavior of the steel beam, which has composite slabs in steel moment frames that are subjected to earthquake ground motions. The effects of composite slabs on the seismic behavior of steel moment frames were investigated. The element can be considered as a single-component series hinge type model whose predicted analytical results were consistent with the experimental results. Likewise, the element showed a significantly better performance than the bare steel beam elements. The composite model can also predict more accurately the local deformation demands and overall response of structural systems under earthquake loading compared with the bare steel models. Therefore, composite stabs can significantly affect locally and globally predicted responses of steel moment frames.

Flexural Performance and Cracking Resistance of Continuous Composite Slab using Micro Steel Fibers (마이크로 강섬유 콘크리트를 적용한 연속 합성슬래브의 휨 및 균열 저항성능)

  • Hwang, Hyeon-Jong;Park, Hong-Gun;Hong, Geon-Ho;Kim, Gap-Deug;Choi, Se-Jin
    • Journal of the Korea Concrete Institute
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    • v.27 no.4
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    • pp.387-397
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    • 2015
  • In the present study, to enhance the constructability, a composite slab system using deck plate and micro steel fiber concrete was studied. In the proposed slab system, on-situ re-bar placement is not required. Steel fibers replace the temperature reinforcement. The present study focused on the crack control at the slab top in the continuous composite slab without spliced bars. Eight continuous slabs with various parameters were tested under vertical loading. The test parameters were the amount and types of micro steel fibers, types of deck plate, and the use of top bars in the continuous slab. To evaluate the crack resistance of the slabs, crack widths were measured in the continuous slabs. The test results showed that although the top spliced bars were not used, cracking were restrained by large flexural stiffness of the composite sections.

Analytical Study on Effect of Floor Slab for Progressive Collapse Resistant Capacity of Steel Moment Frames (철골모멘트골조의 연쇄붕괴저항성능에 대한 바닥슬래브의 효과에 관한 해석적 연구)

  • Kim, Seonwoong
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.27 no.1
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    • pp.27-35
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    • 2014
  • In this study, an improved energy-based nonlinear static analysis method are proposed to be used for more accurate evaluation of progressive collapse potential of steel moment frames by reflecting the contribution of a double-span floor slab. To this end, the behavior of the double-span floor slab was first investigated by performing material and geometric nonlinear finite element analysis. A simplified energy-absorbed analytical model by idealizing the deformed shape of the double-span floor slab was developed. It is shown that the proposed model can easily be utilized for modeling the axial tensile force and strain energy response of the double-span floor slab under the column-removal scenario.

A Shear Bond Chracteristics of Composite Slab with Closed-Shape Deckplate (폐쇄형 데크플레이트를 사용한 합성슬래브의 전단부착 특성에 관한 연구)

  • Ju, Gi Su;Park, Sung Moo
    • Journal of Korean Society of Steel Construction
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    • v.13 no.5
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    • pp.557-566
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    • 2001
  • Composite slab with deckplate needs sufficient bond strength between deckplate and concrete to conduct composite behavior Composite slab can transfer the shear by either chemical adhesion interface interlock, or active friction. There are several way of mechanical shear connection in composite slab. that is embossments shear connector shape of deckplate etc. Effect of mechanical interaction is deped on shape of deckplate which is to prevent peeling between deckplate and concrete and an amount of shear connector. The behavior and strength of the connection between the decking and the concrete slab due to embossments and end anchorage may be estimated using the push-off tests described in this paper We proposed the equation of shear bond strength in the composite slab It will be use to design by basic data in composite slab.

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Bending Behaviour of Composite Slab Using a New-Shaped Steel Deck Plate and Expanded Metal (신형 데크플레이트와 철판망을 적용한 합성슬래브의 휨 거동)

  • Kim, Myoung Mo;Eom, Chul Hwan
    • Journal of Korean Society of Steel Construction
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    • v.15 no.4
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    • pp.403-412
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    • 2003
  • The composite metal deck plate system has been widely used for office structures. Recently, however, the flat deck plate has been developed to apply the composite slab system to residential structures. Reduction in construction cost and time can be expected by using expanded metal instead of wire mesh as crack control reinforcements. This study proposed a composite slab system composed of a new-shaped steel deck plate and expanded metal. Twelve specimens were tested to evaluate the structural performance of the new composite slab system. The test results were summarized mainly in terms of maximum load carrying capacity and failure behaviors of each specimen.