• Title/Summary/Keyword: 전단성능

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An Experimental Study on Flexural/Shear Load Properties of SC(Steel Plate Concrete) Structure with Reinforced Concrete Joint (강판콘크리트 구조 이질접합부의 면외 휨/면내 전단하중 특성에 관한 실험연구)

  • Lee, Kyung-Jin;Hwang, Kyeong-Min;Hahm, Kyung-Won;Kim, Woo-Bum
    • Journal of Korean Society of Steel Construction
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    • v.24 no.2
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    • pp.137-147
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    • 2012
  • This paper describes an experimental study on the mechanical characteristic and behavior of a structure that has a joint between the reinforced concrete (RC) member and steel plate concrete (SC) member. An out-of-plane flexural test on an L-type test specimen and in-plane shear test on an I-type test specimen were carried out by means of repeated cyclic loading until their failure. Based on the results, the former showed pull-out failure mode of anchored vertical bars while the latter exhibited flexural failure mode of the basement member. These results reveal that the maximum capacity of the specimens is 96% and 82%, respectively, compared with the theoretical value.

Evaluation of Seismic Performance on Shear Walls in Steel House (스틸하우스 전단벽체의 내진성능평가)

  • 이재석;이승은;홍건호;김원기
    • Journal of the Earthquake Engineering Society of Korea
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    • v.6 no.6
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    • pp.65-72
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    • 2002
  • This study estimates steel house shear wall's seismic performance depending on trend of seismic design. As a result at cyclic-test, the capability of energy dissipation about X1SPCH during this test is good enough. The capability of energy dissipation of X3SPCH and X4SPCH was better than that of X1SPCH. The X2SPCH which is similar to real X-braced shear wall has better seismic performance than shear wall braced with structural sheathing materials on pseudo-dynamic test.

The Structural Performance Evaluation of Steel Pipe Pile Cap with Perfobond Rib Shear Connector (유공강판 전단연결재로 보강된 강관말뚝머리의 구조 성능 평가)

  • Koo, Hyun-Bon;Kim, Young-Ho;Kang, Jae-Yoon
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.6A
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    • pp.843-851
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    • 2008
  • The conventional pile cap reinforcement systems regulated in the design specifications have some restrictions in design and construction such as requirement of shear key, disposition of reinforcing bars and insurance of anchoring length of reinforcements. This study suggests a new type of steel pipe pile cap system with perforated flat bar shear connector as an alternative to the conventional pile cap system for the improvement in structural performance and simplification of construction. And, experimental results of push-out and bending behavior are scribed for the evaluation of structural performance of the new pile cap system and it was compared to the structural behavior of conventional pile cap system.

An Experimental Study on Shear Behaviors for Reinforced Concrete Beams Embedded with GFRP Plate with Openings (매립형 유공 GFRP 판으로 보강된 RC보의 전단거동에 관한 실험적 연구)

  • Choi, Jong-Hoon;Kim, Min-Sook;Kim, Hee-Cheul;Lee, Young-Hak
    • Journal of the Korea Concrete Institute
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    • v.24 no.4
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    • pp.407-414
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    • 2012
  • The purpose of this study is to experimentally investigate the shear behavior of reinforced concrete beams embedded with GFRP (glass fiber reinforced polymer) plate with openings. In this study, the parameters include the shape of reinforcement, reinforcement area, and thickness and width of reinforcements. The test was performed on 9 specimens with shear spanto-depth ratio of 2.8. When the reinforcement area was varied, the GFRP plate showed 3.6 times greater shear strength than steel stirrup. The test result showed that shear strength increased as reinforcement area increased. Also, when the shape of a parallelogram GFRP plate was used, it showed higher shear strength than that with rectangular shape. Effect of thickness and width of reinforcement showed that shear capacity increased as width increased. For a comparison study, a calculation of the shear strength of reinforced beams with GFRP plate based on the ACI 318M-08 was compared with the test results. The test results were compared with the maximum shear reinforcement areas required by ACI 318M-08, CSA-04, and EC2-02 provision.

Withdrawal and Lateral Resistance of Nail Joints Composed of Dimension Lumber and OSB in Light-Frame Wood Construction (경골목구조에서 구조재와 오에스비로 구성된 못 접합부의 인발 및 전단성능)

  • Oh, Sei-Chang
    • Journal of the Korean Wood Science and Technology
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    • v.41 no.3
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    • pp.211-220
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    • 2013
  • The nailed joints in wood construction are commonly designed to resist and carry the lateral load but also subject to withdrawal force like uplift load due to the wind. This research was conducted to evaluate the performance of nailed joint composed of dimension lumber and sheathing materials through the nail withdrawal and unsymmetric double shear joint test, and then compared to current design values. The withdrawal strength was greatly dependant on wood specific gravity, and the withdrawal strength of I-joist with OSB showed higher value in spite of low specific gravity. The maximum withdrawal loads were greater than that of derived current design values about 5 times. The lateral resistance of Japanese larch/OSB nailed joints was higher than that of SPF/OSB nailed joint, and derived allowable lateral strength of nailed joints in this study exceeded the current design values. The failure mode of nailed joints was primarily due to the nail bending and this tendency was notable in SPF/OSB nailed joint.

A Study on the Shear performance of Joints for slab extension (슬래브확장을 위한 접합부의 전단성능에 관한 연구)

  • Ryu, Han-Gook;Park, Tae-Won;Chung, Lan;Lee, Sang-Hyun
    • Proceedings of the Korea Concrete Institute Conference
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    • 2009.05a
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    • pp.109-110
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    • 2009
  • This study is to evaluate the shear performance of joint between existing and new slab in apartment remodeling construction for enlarging existing slab. The horizontal joint parameters are consisted by steel pipe cotter, shear reinforcement, H-steel, stud bolt, and round shear key by concrete. And joint specimens will be tested to evaluate the shear performance of these parameters. If the joint detail have sufficient strength, it will be proposed the basic form on the design of joint parts.

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An Experimental Study on the shear connection for UHPC Deck Bridge (초고성능 콘크리트 바닥판 교량의 전단연결부에 대한 실험적 연구)

  • Yoo, Dong-Min;Hwang, Hoon-Hee;Kim, Sung-Tae;Park, Sung-Young
    • Composites Research
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    • v.24 no.5
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    • pp.29-33
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    • 2011
  • The application of high performance materials for the deck can represent a fair alternative to reduce the weight of the deck and improve the econimic efficiency of the bridge even if high performance materials are costly. In UHPC(Ultra High Performance Concrete) bridges, it is necessary to verify that exiting headed stud can be used to transfer longitudinal shear forces across the steel-concrete interface. In this paper, the push-out tests are performed to analisys the composite behavior between UHPC bridge deck and steel girder. The ultimate strength of test specimens is proportional to the diameter of headed studs in push-out test for static loading. Test results show that the shear strength of headed stud is improved for the case of normal concrete bridge decks.

Push-out Performance Test of Composite Steel Truss Deck using Light Weight Concrete (경량콘크리트를 사용한 합성 철선트러스 데크의 푸쉬 아웃 성능 실험)

  • Choi, Byong Jeong;Moon, Hyo Jin;Han, Hong Soo;Han, Kweon Gyu
    • Journal of Korean Society of Steel Construction
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    • v.21 no.1
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    • pp.15-26
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    • 2009
  • Push-out tests were performed to evaluate the shear capacity of a composite steel truss deck slab system, called an automatic prefabrication bar-mesh system, using lightweight concrete. The six specimens were classified into three groups: DP, NDP, and Solid, according to the variations between the bar mesh and the zinc plate automatic prefabrications. This paper focused on the failure behaviors, load-displacement characteristics, and a performance comparison based on design codes.

Shear Capacity of Precast Concrete Triple Ribs Slab (프리캐스트 콘크리트 트리플 리브 슬래브의 전단성능)

  • Hwang, Seung-Bum;Seo, Soo-Yeon;Lee, Kang-Cheol;Lee, Seok-Hyun
    • Journal of the Korea Concrete Institute
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    • v.28 no.4
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    • pp.489-496
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    • 2016
  • Recently, a concern about hollow core precast concrete (PC) slab has been increased as a method to improve the construction ability by reducing the self weight of structures during the construction. Hollow core slab which is known as a typical PC slab in domestic construction of PC building has a problem to put shear reinforcements in the web of element during the production of element in the factory. With regard to this point, recently, tripple ribs slab (TRS) which can be said as a new type of half PC slab system was developed. In TRS, it is possible to place shear reinforcements in PC element during the production of the element in the factory. This paper presents the shear test result of TRS which was done by one point loading test under simple support condition. Test parameters are the presence of cast-in-place (CIP) concrete and the contribution of lattice bars. From the test, it was found that the TRS has sufficient shear capacity to resist the design load and its strength can be predicted by the code equations for general beam. It is recommended to ignore the strength of lattice bar in the calculation of shear strength during the construction since its contribution is too low to be considered when CIP is not casted.