• Title/Summary/Keyword: PC slab

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Performance of Beam-Slab connection of Waffle Shape Precast Prestressed Concrete Slab System (와플(Waffle) 형상을 가지는 PC슬래브의 보-슬래브 접합 성능)

  • Heo, Seok-Jae;Kim, Hyun-Jin;Ryu, Han-Gook;Choi, Kyoung-Kyu;Cho, Seung-Ho;Chung, Lan
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.04a
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    • pp.21-24
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    • 2008
  • This research verifies efficiency of Beam-Slab connection with Precast Prestressed Concrete Slab System of WAffle Shape(WAS) which solves problems of double-T system(DTS). Specimen is produced in Precast Concrete factories and is made in a way that WAS is layed across inverted T beam(ITB) and then it is filled with packing. After casting topping concrete into the specimen, curing is carried out. Variable are width of shear key and packing. The analysis is carried out in comparison between displacement and strength of Beam-Slab connection of specimen. The variable is not a effect in joint efficiency. Consequently, it may plans at the minimum with of shear key that packing is easy, will not affect strength.

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Effect of Different Interfacial Shear Reinforcement Lengths and Types on Flexural Behavior of PC/PS-Half Slab (계면 전단 보강근 길이 및 형태 변화에 따른 PC/PS-Half Slab의 휨 거동)

  • 이차돈;이종민
    • Proceedings of the Korea Concrete Institute Conference
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    • 2001.05a
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    • pp.131-138
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    • 2001
  • Total number of seven experimental specimens of size 4.6m$\times$2.4m are designed in full scale with due considerations given to the constructability as well as economic applications. Each specimen is made with different shapes of trusses or hooks along the interfacial surface between precast panel and topping concrete to maintain appropriate shear resistance. Structural performances in terms of strength and ductility under flexural load are examined for each specimen with different types of interfacial shear resistance reinforcements. Experimentally obtained flexural strength are also compared with those of analytical predictions. Based on experimental and analytical studies, design equations are suggested for the developed precast prestressed concrete half-slab systems.

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Application of MRS(Multi Ribbed Slab) System with 4Story-1Piece Columns (4층(層)1절(節) 기둥을 이용한 MRS(Multi Ribbed Slab)공법 적용)

  • Kim, Jung-Taek;Im, Ju-Heuk;Jeon, Byong-Kap;Kim, Yong-Nam
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2011.05b
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    • pp.85-88
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    • 2011
  • MRS(Multi Ribbed Slab) method was developed to accomodate Korean construction practice and needs of Korean customer. By means of 4story-1piece column and MRS method, we achieved construction cost cut down and reduction of construction period.

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Evaluation of Serviceability to Long Span Hollow Core PC Slab (장스팬 Hollow Core PC 슬래브의 사용성 평가에 관한 연구)

  • Jeong, Hyung-Il;Kang, Ji-Hun;Jang, Dong-Un
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2000.06a
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    • pp.955-960
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    • 2000
  • This paper evaluates the serviceability of vibration that is induced by people's walking and running when the long span hollow core slab is used. The dynamic characteristics like a natural frequency and a ramping ratio are found by impact loading test on the mock-up structures. Also, the human induced loading test output is evaluated by the various serviceability criteria. As the various serviceability criteria satisfy with this result, the vibration problem of relevant slab caused by people's behavior does not matter.

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An Experimental Study on the Flexural Behavior of Slabs Using Kaiser Truss (Kaiser Truss를 사용한 일방향 슬래브의 휨 거동에 관한 연구)

  • 김형근;곽노현;류승곤;이희발;정헌수
    • Proceedings of the Korea Concrete Institute Conference
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    • 1994.04a
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    • pp.30-35
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    • 1994
  • In order to investigate on the behavior of one-way slab with Kaiser. Truss, such as flexural strength, failure mode, and ductile capacity, a total of twenty specimens have been tested and compared with the R.C slab without Kaiser Truss. The major variables are Kaiser Truss intervals(30, 40, 60cm), half slab thickness. Test results showed that support interval of half pc slab can be determined by the flexural strength which causes the concrete crack and there are horizontal cracks between upper concrete and half slab in the connection of the specimen with kaiser truss interval 60cm.

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A Study on the Cause and Reduction of Cracks in the Wall Connecting the Underground Parking Lot and the Apartment (지하주차장과 아파트 연결 벽체의 균열 원인 분석 및 저감방안 연구)

  • Shim, Hak-Bo;Park, Soon-Jeon
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2020.06a
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    • pp.161-162
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    • 2020
  • Cracks are caused by drying shrinkage between the upper part of the underground parking lot and the apartment wall. As a result of the investigation, the distance between the apartment and the apartment is more than 45m, and the top slab of the underground parking lot is usually flat when there is not with steps. Therefore, the crack occurs more when the underground parking lot is a PC slab than a RC slab. In this study, the reduction of cracks was conducted by extending the slab, expanding the beam size, increasing the wall thickness, and installing a delay joint on slab. In each case, a finite element analysis was performed to examine the crack reduction method.

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Impact Characteristics of AFRP Reinforced Concrete Slab (AFRP 보강 콘크리트 슬래브의 충격 특성에 관한 연구)

  • Park, Sung-Jin
    • Journal of the Society of Disaster Information
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    • v.14 no.4
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    • pp.492-500
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    • 2018
  • Purpose: In this paper, based on this background, the main purpose of studying the behavior of concrete slab reinforced with new material fiber in impact loading is investigated by AFRP using aluminum fiber. Results: Research on the use of new materials as reinforcing materials for concrete members has been carried out in many fields such as flexural and shear tests under static loading, fatigue loading under cyclic loading, and application to PC beams. However, And the issue of plate elements is still at a basic stage. Conclusion: In this paper, the dynamic behavior of reinforced concrete slabs is investigated by using AFRP rod reinforced with aluminum fiber.

Cost Analysis of Composite Method Using Hollow-PC Column (중공 PC기둥을 적용한 복합공법의 공사비 분석)

  • Park, Byeong-Hun;Kim, Jae-Yeob
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2016.10a
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    • pp.71-72
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    • 2016
  • Most of studies on PC method aim at the structural analysis and development of PC members, and studies on the construction management aspect are insufficient. Therefore, this study tries to investigate 'hallow PC column composite method(HPC composite method)' from the viewpoint of construction management and analyze the construction cost of the composite method. On the assumption that each comparative method was applied to the zone, the difference in construction cost between the two methods was analyzed. As a result, HPC composite method increased the initial investment cost because of its factor technology, but reduced transport cost, lifting cost, and installation cost through lightweight columns. This study analyzed only the difference in construction cost of HPC composite method so that it has the limitation in evaluating its economy. Therefore, to evaluate the economy of HPC composite method, it is considered to research more the construction cost of HPC composite method.

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An Experimental Study III on the Bolted Connection between H-Beam and Precast-Concrete Column (PC 기둥-H형강보의 볼트접합부에관한 실험적 연구III)

  • Yeo, In-Seok;Park, Soon-Kyu
    • Proceedings of the Korea Concrete Institute Conference
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    • 2005.11a
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    • pp.307-310
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    • 2005
  • The PCS system, which consists of precast concrete column and steel beam, has been under development. Experimental test has been carried out to investigate the structural performance of the system under earthquake. Two types of test specimens of beam-column joints are designed in order to compare the performances. One is the system with reinforced concrete slab and the other is without slab. It is found that the system with slab could satisfy all of the requirements from ACI Criteria such as strength, stiffness degradation and energy dissipation capacity except initial stiffness. It is also investigated that the stiffness of the joint is belong to rigid joint type according to Bjorhovde criterion. And it is observed that the partial-composite system between beam and slab is more effective than full-composite system in the respect of the energy dissipation capacity of the system.

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Construction and Development of Turnout on concrete roadbed applicable to high speed railway (고속철도 적용을 위한 콘크리트 도상 분기기 개발 및 부설)

  • Park, Choon-Bok;Kwon, Ho-Jin;Jeon, Se-Gon;Yoon, Byung-Hyun;Oh, Soo-Jin;Choi, Yong-Seok
    • Proceedings of the KSR Conference
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    • 2007.11a
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    • pp.1223-1228
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    • 2007
  • Since KHSL 2nd phase was adapted as a main track design, the interests of concrete slab track system have been gradually increased in the division of rail track engineering and many engineering companies have been trying to adapt a concrete slab track system at this moment. Advantages of this system proved in advanced country, japan and Germany etc. are excellent maintenance, track stability and increasing of buckling resistance This developed turnout is same with the KHSR 1st phase's design and applications rules, components and signaling system since it observes KTX specification. Comparing it with the former turnout, High-elasticity pad, lubrication-free roller slide plate and Rheda2000 PC sleeper are only different. The purpose of this study is the development of high speed turnout on concrete slab track and its application on site. Now these studies are going to show the verification and confidence about the interface between ballast-track and concrete slab track by finding and solving the possible problems when it is installed on site and to make these turnouts applied perfectly and completely on concrete slab track. Its first trial construction in korea had been successfully completed at Sangju-station on July 20th ,2007 thanks to KORAIL and KR. Hereunder Sampyo E&C trys to introduce all of turnout technologies on concrete slab track system with Rheda 2000 sleeper

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