• Title/Summary/Keyword: 프리캐스트 전단벽

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Modeling of Precast Concrete Shear Walls BIM Program (BIM 프로그램을 이용한 프리캐스트 콘크리트 전단벽의 모델링)

  • Mun, Ju-Hyun;Yoon, Hyun-Sub;Kim, Jong-Won;Eom, Byung-Ho
    • Journal of the Korea Institute of Building Construction
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    • v.22 no.5
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    • pp.451-462
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    • 2022
  • The objective of the study is to establish a BIM modeling of precast concrete(PC) shear wall with various wall-to-base connections. The family library of PC shear wall was established in BIM program using component function in a IFC(Industry foundation classes) file format and SketchUp program. From the BIM program, the amounts of concrete, reinforcing bars and steel materials as well as the interference of arranged reinforcing bars can be accurately evaluated in the PC shear walls with spliced sleeves, bolt, or welding plate connection methods. Although the additional metallic materials such as steel plates, bolts, and nuts were used in the PC shear walls with welding plate connection method, their amounts of materials, economic efficiency, and environmental impact were similar to those with spliced sleeve connection. Consequently, the bolt or welding connection is a highly applicable method as wall-to-base connection of PC shear walls, and it was a more useful method than spliced sleeve method, particularly considering the constructability.

Ductility Demand of Precast Coupled Shear Wall (프리캐스트 병렬 전단벽의 연성도 해석)

  • 홍성걸;김영욱
    • Journal of the Earthquake Engineering Society of Korea
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    • v.3 no.2
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    • pp.29-40
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    • 1999
  • This study presents a simplifled calculation method for required ductility of coupling beams in precast coupled shear walls at preliminary seismic design stages. Deflection of precast coupled shear walls based on a continuum approach is combined with inelastic gap opening of horizontal connection of panels to provide a relationship between the system-level ductility and the element-level ductility in a precast coupled shear wall. The equation proposed herein for ductility requirement for coupling beams shows that higher stiffness and lower strength of coupling beams result in high ductility reuqirement. The equation also shows that the ductility requirement is proportional to the degree of gap opening of the story in question. However, the coupling beam ductility in higher stories are not affected by gap openings of horizontal connections of panel.

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Behavior of Precast Concrete Shear Walls with C-Type Connections (C형 접합부를 이용한 프리캐스트 콘크리트 전단벽의 거동)

  • Lim, Woo-Young;Hong, Sung-Gul
    • Journal of the Korea Concrete Institute
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    • v.22 no.4
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    • pp.461-472
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    • 2010
  • This paper investigates the behavior of precast concrete (PC) shear walls with a new vertical connections for a fast remodeling construction. The C-type vertical connections for the PC wall systems are proposed for transfer of bending moment between top and bottom walls in the vertical direction while a shear key in the center of wall is prepared to transfer shear forces by bearing action. The proposed vertical connections allows easy fabrication thanks to slots at the edges of wall in opposite directions. The plane PC wall systems subject to lateral load are compared with ordinary wall systems by investigating the effects of connection on the stiffness, strength, ductility, and failure modes of whole systems. The load-displacement relationship and influence of premature failure of connections are examined. The experimental test showed that the longitudinal reinforcing steel bars placed at the edges of walls yielded first and the ultimate deformation were terminated due to premature failure of connections. The diagonal reinforcements for efficient shear transfer in the walls were not effective. The strength and deformation obtained through the section analysis were generally in agreement with the experimental data, and indicated that. Gap opening contributed to the deformation behavior more than any other factors.

Verification of Reinforcing Arrangement Error in Precast Concrete Shear Walls Using BIM and Presentation of Flexural Ductility Model (BIM을 이용한 프리캐스트 콘크리트 전단벽의 배근 오류 검증 및 휨 연성 모델 제시)

  • Ju-Hyun Mun
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.28 no.3
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    • pp.27-36
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    • 2024
  • This study established a BIM procedure considering manufacturing errors in the production process, and evaluated the flexural ductility of precast all-lightweight aggregate concrete special shear walls (PLASWs) with spliced sleeve technique. In the production process, the concrete cover thickness of PALSW was on average 1.28 times greater than the cross-sectional details of the specimen modeled with Revit BIM program. In particular, the bending inner radius of the hoop and inner-cross tie were greater than the designed details. Consequently, the confinement effect of core concrete reduced from 64% to 54% due to the manufacturing errors in the transverse reinforcing bars, resulting in a decrease in the ductility of PALSW by approximately 4.91%. Considering these findings, the BIM of PLASW with spliced sleeve technique should compliment the bending inner radius of the transverse reinforcing bars, and the defined brittleness increase coefficient reflecting the decreased core concrete confining pressure in the stress-strain relationship of confined concrete should be evaluated as 1.8.

A Simplified Seismic Design Method of Precast Coupled Shear Wall (프리캐스트 병렬 전단벽의 내진 설계에 관한 연구)

  • 홍성걸
    • Proceedings of the Earthquake Engineering Society of Korea Conference
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    • 1998.10a
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    • pp.65-74
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    • 1998
  • In seismic design procedure of precast concrete structure, it is important to assign ductility requirement on the connection element for a favorable failure mechanism. The purpose of this paper is to propose a simplified procedure to determine the required ductility of coupling beam in coupled precast shear wall for a lateral displacement ductility at the top of a structure. This study shows that an equation for ductility of cloupling beam is introduced on the basis of several basic assumption.

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Nonlinear Analysis of Precast Concrete Wall Structures (프리캐스트 콘크리트 판구조의 비선형 해석)

  • 서수연;이원호;이리형
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.13 no.2
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    • pp.189-196
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    • 2000
  • The objective of this paper is to propose an analysis technique to predict the behavior of PC wall structures subjected to cyclic load. While PC wall panel is idealized by finite elements, the joints at which PC walls are connected each other are idealized by nonlinear spring elements. Axial and shear spring elements are developed for simulating shear, compression and tension behaviors of joints. The strength and stiffness of each spring elements we presented from the previous research results and incorporated into the computer program of DRAIN-2DX. The proposed analysis technique is evaluated by analyzing specimens previously tested and comparing with those. On the strength, stiffness, energy dissipation and lateral drift, analytical results show good agreements with test results. This means the proposed technique is effective to predict the response of the PC wall structures.

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Evaluation of Shear Performance on Two Sides Confined SHCC Infill Walls after Cross-Sectional Shape Modification (2면 구속한 SHCC 끼움벽의 단면 감소에 따른 전단성능 평가)

  • Cha, Jun-Ho;Nam, Sang-Hyun;Kim, Sun-Woo;Lee, Young-Oh;Yun, Hyun-Do
    • Proceedings of the Korea Concrete Institute Conference
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    • 2010.05a
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    • pp.55-56
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    • 2010
  • Infill walls have been investigated experimentally and theoretically by many researchers during last decades. The objective of this research is to evaluate structural strengthening performance of lightly reinforced concrete with reduced the inside cross-section of Strain-hardening cement composites(SHCC) experimentally.

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Development of Wide Connection Method for Vertical Joints of Precast Concrete Walls (프리캐스트 콘크리트 벽체 수직접합부의 광폭형 연결방식 개발)

  • Choi, Eun-Gyu;Shin, Yeong-Soo
    • Journal of the Korea Concrete Institute
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    • v.21 no.5
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    • pp.549-556
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    • 2009
  • This research analyzed the structural efficiency and application by improving the 100 mm width vertical joint to 150 mm and developing three connection methods to reduce the difficulty in assembling and handling PC walls. Moreover, nonlinear finite analysis was used for analyzing. From the analysis results, when double width connection was applied, the PC wall showed larger load capacity and ductility due to the steel bar sharing loads efficiently. Moreover, as the dimension of loops and the number of bars increased, the maximum load capacity increased as well. Also, among the double width connections, the largest capacity showed in the order of welding, ring and C type loop. However, in case of welding type loop connection, the ring type loop is more stable due to changes in different site conditions. Therefore, thorough quality control of welding is necessary.

Analysis on the Shear Behavior of Existing Reinforced Concrete Beam-Column Structures Infilled with U-Type Precast Wall Panel (U형 프리캐스트 콘크리트 벽패널로 채운 기존 철근 콘크리트 보-기둥 구조물의 전단 거동 분석)

  • Ha, Soo-Kyoung;Son, Guk-Won;Yu, Sung-Yong;Ju, Ho-Seong
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.19 no.6
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    • pp.18-28
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    • 2015
  • The purpose of this study is to develop a new seismic resistant method by using precast concrete wall panels for existing low-rise, reinforced concrete beam-column buildings such as school buildings. Three quasi-static hysteresis loading tests were performed on one unreinforced beam-column specimen and two reinforced specimens with U-type precast wall panels. The results were analyzed to find that the specimen with anchored connection experienced shear failure, while the other specimen with steel plate connection principally manifested flexural failure. The ultimate strength of the specimens was determined to be the weaker of the shear strength of top connection and flexural strength at the critical section of precast panel. In this setup of U-type panel specimens, if a push loading is applied to the reinforced concrete column on one side and push the precast concrete panel, a pull loading from upper shear connection is to be applied to the other side of the top shear connection of precast panel. Since the composite flexural behavior of the two members govern the total behavior during the push loading process, the ultimate horizontal resistance of this specimen was not directly influenced by shear strength at the top connection of precast panel. However, the RC column and PC wall panel member mainly exhibited non-composite behavior during the pull loading process. The ultimate horizontal resistance was directly influenced by the shear strength of top connection because the pull loading from the beam applied directly to the upper shear connection. The analytical result for the internal shear resistance at the connection pursuant to the anchor shear design of ACI 318M-11 Appendix-D, agreed with the experimental result based on the elastic analysis of Midas-Zen by using the largest loading from experiment.

Seismic Performance of Precast Infill Walls with Strain-Hardening Cement Composite (변형경화형 시멘트 복합체를 사용한 프리캐스트 끼움벽판의 내진성능)

  • Kim, Sun-Woo;Jeon, Esther;Kim, Yun-Su;Ji, Sang-Kyu;Jang, Gwang-Soo;Yun, Hyun-Do
    • Proceedings of the Korea Concrete Institute Conference
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    • 2008.11a
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    • pp.89-92
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    • 2008
  • The seismic behavior of the lightly reinforced concrete frames (LRCFs) was controlled by the nonductile behavior of the critical regions. These critical regions require retrofit to improve the seismic behavior of the lightly reinforced concrete frames. Critical column end regions must be retrofit to increase the global ductility capacity. The objective of this research is to evaluate structural strengthening performance of lightly reinforced concrete frame with Strain hardening cement composite(SHCC) experimentally. The experimental investigation consisted of a cyclic load tests on 1/3-scale models of precast infill walls. Reinforcement detail of infill wall was variables in the experiment. The experimental results, as expected, show that the multiple crack pattern, strength, ductility and energy dissipation capacity are superior for specimen with SHCC infill wall due to bridging of fibers and stress redistribution in cement matrix.

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