• Title/Summary/Keyword: 합성바닥판

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Behavior of PSC Composite Bridge with Precast Decks (프리캐스트 바닥판 PSC 합성거더 교량의 거동)

  • Chung, Chul Hun;Hyun, Byung Hak
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.26 no.5A
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    • pp.873-880
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    • 2006
  • PSC composite bridge with precast decks which was designed by the proposed horizontal shear equation was fabricated. Fatigue test was performed to evaluate the endurance of shear connection and the behavior of PSC composite bridge. After all the fatigue loading were applied, no crack and no residual slip were occurred. The flexural stiffness of PSC composite bridge was maintained the initial value, and demage of shear connection was not occurred. To verify the applicability of horizontal shear equation and shear connection detail and to evaluate the strength of PSC composite bridges, static test was also executed. PSC composite bridges with precast decks had 2.08 safety factor which was the ratio of crack to serviceability load and showed ductile behavior after ultimate load. Test results showed that the proposed design equation of the shear connection gave reasonable horizontal shear connection design. Fast and easy construction would be achieved using the suggested precast system.

An Experimental Study on the Bending Behaviour of Steel Grid Composite Deck (격자형 강합성 바닥판의 휨거동에 대한 실험적 연구)

  • Shin, Hyun Seop;Lee, Chin Hyung;Park, Ki Tae
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.15 no.4
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    • pp.175-184
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    • 2011
  • To take advantage of reduced on-site construction periods and minimize traffic impacts various types of steel grid composite deck have been developed since 1930's. Modular prefabricated unfilled grid decks permit a long-distance transportation and construction under unfavorable condition, for example, in mountainous regions due to its comparatively light-weighter structure than fully filled grid deck. In this study bending tests of unfilled grid decks for the deck member of various kinds of infrastructure are carried out, bending strength and behaviour of composite action are experimentally evaluated. In this bending test, design variables are considered, such as type of shear connection between steel grid and concrete slab, spacing between cross bars and thickness of concrete slab. Through test results bending strength and behaviour of composite action are evaluated, reference data for proper type of shear connection and other details of the deck, such as spacing between cross bars, are obtained.

An analytical study on behavior of the girder panel in simplified composite deck under construction loadings (가설하중 하에서 초간편 강합성 바닥판 거더패널의 거동에 관한 해석적 연구)

  • Han, Deuk-Cheon;Kim, Sang-Seup;Yoon, Ki-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.6
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    • pp.1537-1542
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    • 2007
  • In this study, based on a I-roll embedded steel composite deck, it is suggested a new type of simplified composite deck and analyzed under construction loading. Using ABAQUS, it's estimated effects of welding amount of steel plate and I-section, existence of a hole of I-section's flange, and a location of hole. For a reasonable verification of modeling, compare Euler-Beam theory with F.E.M models. In result, it is verified that change of welding amount increase more maximum bending tension stresses at the central part's section of span when elements are partial-welded. Also, verify that deflection is slightly increased when a hole existed compared with no hole.

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Behavior of FRP-Concrete Composite Decks with the Mechanical Connection (기계적 합성이 적용된 FRP-콘크리트 합성 바닥판의 거동 분석)

  • Kim, Sung-Tae;Park, Sung-Yong;Cho, Jeong-Rae;Kim, Byung-Suk;Cho, Keun-Hee
    • Journal of the Korea Concrete Institute
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    • v.22 no.5
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    • pp.609-616
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    • 2010
  • FRP-concrete composite deck, an innovative system, is composed of concrete in the top and FRP panel in the bottom. Bottom FRP panel can reduce self weight and improve workability. This system requires strong connection between FRP and concrete. Therefore coarse sand coating was previously applied on FRP to improve the bonding. In this study, concrete wedge method is newly introduced to enhance both vertical bond and fatigue performance. Three FRP-concrete composite deck specimens with the concrete wedges were manufactured, and static and fatigue tests were carried out. The results showed that the new FRP-concrete composite deck satisfied deflection and crack width limits set by the design codes. And the fatigue test showed that the composite deck was capable of two million load cycles under 50% of its static strength. Based on the results, it can be concluded that that this new system has outstanding mechanical and durability performance, and therefore, satisfactorily be used in designing FRP-concrete composite deck.

Fatigue Performance of Precast Decks using Ribbed Loop Joints in a Two-Girder Continuous Composite Bridge (2거더 연속합성형교 요철형 루프이음 프리캐스트 바닥판의 피로성능)

  • Lee, Han-Joo;Yeo, Woon-Young;Shin, Dong-Ho;Kim, In-Gyu;Park, Se-Jin
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.23 no.1
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    • pp.85-93
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    • 2019
  • Structural performance and serviceability of precast deck system are mostly determined by connection details between precast decks. Particularly, since the bridge deck is under repeated loads such as traffic loads, fatigue behavior and performance of joints should be investigated. In this study, a two-girder continuous composite bridge specimen was fabricated using the asymmetric ribbed loop joints, and static and fatigue load tests were conducted to evaluate the structural behavior and the crack pattern of the bridge deck. From the test results, the proposed precast deck system resulted in sufficient fatigue performance and failure strength. Therefore, the proposed precast deck system can be applied to the connection part of precast decks effectively.

Fatigue Performance of Bridge Decks using Half-Depth Precast Panel with Loop Joint (루프이음 반단면 프리캐스트 패널을 이용한 교량 바닥판의 피로성능)

  • Chung, Chul Hun;Lim, Seung Jun;Kim, Hyun Jun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.30 no.1A
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    • pp.35-43
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    • 2010
  • The panels are used as a composite part of the completed deck. They replace the main bottom transverse deck reinforcement and also serve as a form surface for the cast-in-place concrete upper layer that contains the top of deck reinforcement. However, in order to apply the precast panels to bridges properly, it is necessary to fully understand the structural characteristics of joint in precast panels. Particularly, since the bridge deck is under repeated loads such as traffic loads, fatigue behavior and characteristics of joint should be investigated. In this paper, fatigue tests of composite deck with shear ties and loop joints were conducted. The fatigue tests were conducted with an application of repeated loading and wheel loading. Test results were analyzed to examine the current design code for fatigue of reinforcement bar and serviceability under repeated loading.

Behavior of FRP-Concrete Composite Deck for a Cable Supported Bridge (사장교용 FRP-콘크리트 합성 바닥판의 거동 특성)

  • Cho, Keun-Hee;Park, Sung-Yong;Kim, Sung-Tae;Cho, Jeong-Rae;Kim, Byung-Suk
    • Proceedings of the Korea Concrete Institute Conference
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    • 2009.05a
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    • pp.51-52
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    • 2009
  • A new-type FRP-concrete composite deck is developed and experimentally verified, which is economically applicable to a bridge with a long span exhibiting high cost effectiveness according to reducing self-weight such as cable supported bridge.

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Evaluation on Flexural Performance for Light-Weight Composite Floor with Sound Reduction System (층간소음 대응형 경량합성바닥판에 대한 휨성능 평가)

  • Bae, Kyu Woong;Lee, Sang Sup;Park, Keum Sung;Heo, Byung Wook;Hong, Sung Yub
    • Journal of Korean Society of Steel Construction
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    • v.26 no.3
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    • pp.241-250
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    • 2014
  • The purpose of this study is to propose structural technologies on the light-weight composite floor systems in the unit modular and to evaluate structural performance of the composite floor through flexural experiments. The flexural experiments were carried out on total nine specimens(each three type in shape) using steel flat deck and truss deck. From the results of test, all specimens showed the same failure patterns which exhibited deflection at the center of the specimens due to flexural deformation before concrete crushing at the upper of specimens. Also, we know that the proposed floors satisfied in serviceability and would be safe sufficiently. The ratio of experimental yield load by theoretical nominal load was the distribution of 0.86 to 1.27 with an average 1.04. Coefficient of variation in distribution showed good agreement.

Analysis For Effective Moment For Iinertia For Corrugated Steel-Concrete Composite Deck with I-beam Welded (교량용 I형강 접합 절곡강합성 바닥판의 휨강성 분석)

  • Son, Chang-Du;Park, Jun-Myung;Han, Kyung-Bong;Kim, Jun-Won;Lee, Jae Hwan
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.11a
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    • pp.209-212
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    • 2008
  • Corrugated steel-concrete composite deck with I-beam welded is lighter and has higher load carrying capacity than RC slabs due to an I-beam embedded in the corrugated deck. The methods suggested from ACI and design standard of roadway bridge are used to evaluate effective moment inertia of RC structures. This paper presents evaluation and application of effective moment inertia for corrugated steel-concrete composite deck with I-beam welded by using the methods suggested from design standard of roadway bridge, ACI and CEB-FIP MC-90. In order to evaluate effective moment inertia, a series of flexural experiments were carried out. Five beams were built and the parameters considered in the experiments were studs, shape of the sections and connections of the beams. By using the aforementioned methods, effective moments of inertia was calculated and they were compared with the experimental results. As a result, The method suggested from CEB-FIP MC-90 yielded more satisfactory agreement than that from ACI. It was found that the beam has studs showed high load-carrying capacity and high effective moment of inertia.

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