All Issue

2018 Vol.31, Issue 6 Preview Page
Two-way Shear Strength Evaluation of Transfer Slab-Column Connections Through Nonlinear FE Analysis

비선형유한요소해석을 통한 전이슬래브-기둥 접합부의 2면 전단강도 평가

Seong-Hun Jeong1
,
Su-Min Kang1†
정 성 훈1
,
강 수 민1†
1Department of Architectural Engineering, Chungbuk National University, Cheongju, 28644, Korea
1충북대학교 건축공학과
†Corresponding author: Tel: +82-43-261-2436; E-mail: kangsm@cbnu.ac.kr
2018. pp. 315-329
PDF XML Citation
Abstract

Recently, RC transfer slab systems have been used widely to construct high-rise wall-type apartments for securing parking space or public space. However, it is problem that the design method and structural performance evaluation method developed for thin RC flat slab are still used in the design of the transfer slab whose thickness is very thick and therefore structural behavior is expected to be different from RC flat slab. Thus, for the rational design of the transfer slab, the ultimate shear behavior of the RC transfer slab system is required to be analyzed properly. Accordingly, in the present study, the two-way shear behavior of the transfer slab was analyzed using nonlinear FEM according to various design parameters such as thickness of the transfer slab, strength of concrete, shear span ratio, and reinforcement ratio. In addition, the two-way shear strength evaluations of RC transfer slab by the existing evaluation methods were verified by comparing those with the results of nonlinear FEM analysis.

Keywords
transfer slab
numerical analysis
FEM
two-way shear strength
design parameter

최근 국내에서는 고층 벽식 아파트 건설 시, 하부 주차공간과 공용공간 확보를 위하여 RC 전이슬래브 시스템을 사용하는 경우가 증가하고 있다. 하지만 두께가 얇은 RC 무량판 슬래브를 위해 개발된 설계방법 및 구조성능평가 방법을 두께가 매우 두꺼운 전이슬래브 구조설계에 그대로 사용하고 있다는 문제점이 있다. 따라서 합리적인 전이슬래브의 구조설계를 위해서는 RC 전이슬래브 시스템의 2면 전단거동 양상에 대한 명확한 분석이 필요하다. 이에 따라 본 연구에서는 전이슬래브의 두께, 콘크리트 강도, 전단경간비, 철근비 등 다양한 설계변수에 따라 비선형 FEM을 이용하여 전이슬래브의 2면 전단거동을 분석 하였다. 또한 비선형 FEM 해석결과와 기존의 2면 전단강도 평가식으로 예측한 전단강도를 비교분석하여 기존 평가식의 전 이슬래브 2면 전단강도 평가 유효성을 검토하였다.

키워드
전이슬래브
수치해석
FEM
2면 전단강도
설계변수
References
1
Yoon, J.K., Lee, D.B., Kim, U.J., Kang, S.M. (2009) DMF(Double Mat Foundation) System Efficient Design and Practical Application of DMF(Double Mat Foundation) System with Transfer Slab, Anuual Conf. Korea Inst. Build. Constr., 9(1), pp.79~88.
2
ACI Committee 318 (2008) Building Code Requirement for Structural Concrete (ACI318-13) and Commentary, American Concrete Institute, p.465.
3
Ahn, S.K., Park, H.G. (2005) Shear Reinforcement for Flat Plate-Column Connections Using Lattice Bars, J. Korea Concr. Inst., 17(2), pp.191~200. 10.4334/JKCI.2005.17.2.191
10.4334/JKCI.2005.17.2.191
4
Choi, K., Shin, D., Park, H. (2014) Shear-Strength Model for Slab-Column Connections Subjected to Unbalanced Momenet, ACI Struct. J., 111(3), pp.491~502. 10.14359/516865330889-3241
10.14359/51686533
5
Eom, T.S., Kang, S.M., Choi, T.W., Park, H.G. (2018) Punching Shear Tests of Slabs with High-Strength Continuous Hoop Reinforcement, ACI Struct. J., 115(5), pp.1295~1306. 10.14359/517022310889-3241
10.14359/51702231
6
Eom, T.S., Song, J.W., Song, J.K., Kang, G.S., Yoon, J.K., Kang, S.M. (2017) Punching-Shear behavior of Slabs with Bar Truss Shear Reinforcement on Rectangular Columns, Eng. Struct., 134, pp.390~399. 10.1016/j.engstruct.2016.12.0480141-0296
10.1016/j.engstruct.2016.12.048
7
Eurocode 2 (2004) Design of Concrete Structures, European Committee for Standardization.
8
Jang, J.I., Kang, S.M., Kim, J.W. (2018) Nonlinear Numerical Analysis for Reasonable Shear Reinforcement of Flat Plate Connection, J. Inst. Constr. Technol., 37(1), pp.1~6.
9
Kang, S.M., Kim, J.W., Choi, K.K., Park, H.G. (2016) Shear Behavior Investigation of Biaxial Hollow Slabs Through Non-linear FE Analysis, J. Archit. Inst. Korea Struct. & Constr., 32(12), pp.3~13. 10.5659/JAIK_SC.2016.32.12.3
10.5659/JAIK_SC.2016.32.12.3
10
Kim, J.S., Shin, J.H. (2009) Mechanical Properties of Concrete with Statistical Variations, KCI Struct. J., 21(6), pp.789~796. 10.4334/JKCI.2009.21.6.789
10.4334/JKCI.2009.21.6.789
11
Korean Concrete Institute (2012) Concrete Structure Design Code (KCI 2012), Korean Concrete Institute, Seoul.
12
Lee. J-H. (2015) Prestressed Concrete, Dong Myeong Publishers, pp.85~86.
13
Midas Information Technology Co ., Ltd. (2008) Midas user's Manual, Analysis and Algorithm, Korea.
14
Park, H.G. (1995) Nonlinear Analysis of Reinforced Concrete Members using Plasticity with Multiple Failure Criteria, Korean Concr. Inst., 7(2), pp.145~154.
15
Park, H., Choi, K. (2007) Strength of Exterior Slab-column Connections Subjected to Unbalanced Moments, Eng. Struct., 29(6), pp.1096~1114. 10.1016/j.engstruct.2006.08.0010141-0296
10.1016/j.engstruct.2006.08.001
16
Park, H., Choi, K., Chung, L. (2011) Strain -based Strength Model for Direct Punching Shear of Interior Slab-column Connections, Eng. Struct., 33(3), pp.62~173. 10.1016/j.engstruct.2010.12.0320141-0296
10.1016/j.engstruct.2010.12.032
17
R. von Mises (1913) Mechanik der festen KÖrper im plastisch deformablen Zustand, GÖttin. Nachr. Math. Phys., 1, pp.582~592.
18
Thorenfeldt, E., Tomaszewicz, A., Jenson, J.J. (1987) Mechanical Properties of High-Strength Concrete and Applications in Design, In Proc. Symp. Utilization of High-Strength Concrete, Tapir.
19
Yoon, J.K., Kang, S.M., Kim, O.J., Lee, D.B. (2008) A Study on the Behavior and Practical Design Method for Transfer Slab used in Shear Wall Type Apartment with Piloti under Pit Level, Annual Conf. Archit. Inst. Korea, 28(1), pp.231~234.
Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 31
  • No :6
  • Pages :315-329
  • Received Date : 2018-10-04
  • Revised Date : 2018-11-01
  • Accepted Date : 2018-11-02
  • DOI :https://doi.org/10.7734/COSEIK.2018.31.6.315
Journal Informaiton Journal of the Computational Structural Engineering Institute of Korea Journal of the Computational Structural Engineering Institute of Korea
Online Submission
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close