비선형 유한요소해석 기반 국내 고층아파트 외벽구조의 균열손상 특성 분석
Crack Damages in Exterior Wall Structures of Korean High-Rise Apartment Buildings Based on Nonlinear Finite Element Analysis
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Recently, in newly constructed apartment buildings, the exterior wall structures have been characterized by thinness, having various openings, and a significantly low reinforcement ratio. In this study, a nonlinear finite element analysis was performed to investigate the crack damage characteristics of the exterior wall structure. The limited analysis models for a 10-story exterior wall were constructed based on the prototype apartment building, and nonlinear static analysis (push-over analysis) was performed. Based on the finite element (FE) analysis model, the parametric study was conducted to investigate the effects of various design parameters on the strength and crack width of the exterior walls. As the parameters, the vertical reinforcement ratio and horizontal reinforcement ratio of the wall, as well as the uniformly distributed longitudinal reinforcement ratio and shear reinforcement ratio of the connection beam, were addressed. The analysis results showed that the strength and deformation capacity of the prototype exterior walls were limited by the failure of the connection beam prior to the flexural yielding of the walls. Thus, the increase of wall reinforcement limitedly affected the failure modes, peak strengths, and crack damages. On the other hand, when the reinforcement ratio of the connection beams was increased, the peak strength was increased due to the increase in the load-carrying capacity of the connection beams. Further, the crack damage index decreased as the reinforcement ratio of the connection beam increased. In particular, it was more effective to increase the uniformly distributed longitudinal reinforcement ratio in the connection beams to decrease the crack damage of the coupling beams, regardless of the type of the prototype exterior walls.
Abstract
Recently, in newly constructed apartment buildings, the exterior wall structures have been characterized by thinness, having various openings, and a significantly low reinforcement ratio. In this study, a nonlinear finite element analysis was performed to investigate the crack damage characteristics of the exterior wall structure. The limited analysis models for a 10-story exterior wall were constructed based on the prototype apartment building, and nonlinear static analysis (push-over analysis) was performed. Based on the finite element (FE) analysis model, the parametric study was conducted to investigate the effects of various design parameters on the strength and crack width of the exterior walls. As the parameters, the vertical reinforcement ratio and horizontal reinforcement ratio of the wall, as well as the uniformly distributed longitudinal reinforcement ratio and shear reinforcement ratio of the connection beam, were addressed. The analysis results showed that the strength and deformation capacity of the prototype exterior walls were limited by the failure of the connection beam prior to the flexural yielding of the walls. Thus, the increase of wall reinforcement limitedly affected the failure modes, peak strengths, and crack damages. On the other hand, when the reinforcement ratio of the connection beams was increased, the peak strength was increased due to the increase in the load-carrying capacity of the connection beams. Further, the crack damage index decreased as the reinforcement ratio of the connection beam increased. In particular, it was more effective to increase the uniformly distributed longitudinal reinforcement ratio in the connection beams to decrease the crack damage of the coupling beams, regardless of the type of the prototype exterior walls.
참고문헌 (29)
- ACI Committee 318, "Building Code Requirements for Structural Concrete and Commentary (ACI 318-19)", American Concrete Institute, ~ (2019)
- "KDS 14 20 00. Concrete Structural Design Code", Korea Construction Standards Center, ~ (2021)
- "EN, BSIBS. 1-1: 2004, Eurocode 2: Design of Concrete Structures. General Rules and Rules for Building", CEN, ~ (2004)
- "2017 Pohang Earthquake White Paper", Ministry of Public Administration and Security, ~
- Puranam AY, "Reinforcement Limits for Reinforced Concrete Elements with High-Strength Steel", ACI Structural Journal, 116(5), pp.201~213 (2019)
- Kim SH, "Effect of Low Reinforcement Ratio on Reinforced Concrete Wall with 700 MPa Reinforcing Bars", ACI Structural Journal, 120(2) (2023)
- Cardenas AE, "Strength of low-rise structural walls", Special Publication, 63, pp.221~242 (1980)
- Carrillo J, "Shear strength of reinforced concrete walls for seismic design of low-rise housing", ACI Structural Journal, 110(3), pp.415~ (2013)
- Baek JW, "Minimum shear reinforcement of slender walls with grade 500 MPa (72.5 ksi)reinforcing bars", ACI Structural Journal, 115(3), pp.761~774 (2018)
- Park HG, "Cyclic loading tests for shear strength of low-rise reinforced concrete walls with grade 550 MPa bars", ACI Structural Journal, 112(3), pp.299~ (2015)
- Baek JW, "Cyclic loading test for reinforced concrete walls (Aspect Ratio 2.0) with grade 550 MPa (80ksi) shear reinforcing bars", ACI Structural Journal, 114(3), pp.673~ (2017)
- Baek JW, "Cyclic Loading Test for Walls of Aspect Ratio 1.0 and 0.5 with Grade 550 MPa (80 ksi) Shear Reinforcing Bars", ACI Structural Journal, 114(4) (2017)
- Kim SH, "Shear Strength of Reinforced Concrete Wall with 700 MPa Shear Reinforcement", ACI Structural Journal, 118(2) (2021)
- Kim SH, "Cyclic loading test for lightly reinforced exterior wall with openings", Journal of Building Engineering, 76, pp.107217~ (2023)
- Saheb SM, "Ultimate strength of RC wall panels with openings", Journal of structural engineering, 116(6), pp.1565~1577 (1990)
- Taylor CP, "Design of slender reinforced concrete walls with openings", Structural journal, 95(4), pp.420~433 (1998)
- Mosoarca M, "Failure analysis of RC shear walls with staggered openings under seismic loads", Engineering Failure Analysis, 41, pp.48~64 (2014)
- Li B, "Flange effects on seismic performance of reinforced concrete squat walls with irregular or regular openings", Engineering Structures, 110, pp.127~144 (2016)
- Hong NR, "Damage Analysis of Exterior Walls and Beams of High-Rise Wall-type Apartment Buildings Under Operational Performance Level Earthquakes", Journal of the Architectural Institute of Korea, 38(11), pp.327~338 (2022)
- Jeong GH, "Seismic Fragility Analysis of High-Rise RC Box-Type Wall Building Structures", Journal of the Earthquake Engineering Society of Korea, 20(3), pp.155~162 (2016)
- Rhee I, "Earthquake Response Analysis for Three-Story Building with Reinforced Concrete Shear Walls", Journal of the Earthquake Engineering Society of Korea, 25(3), pp.103~110 (2021)
- Kim TW, "An equivalent model for the seismic analysis of high-rise shear wall apartments", Journal of the Earthquake Engineering Society of Korea, 11(5), pp.11~21 (2007)
- Lee HS, "Analytical Simulation of the Seismic Response of a High-Rise RC Building Model", Journal of the Earthquake Engineering Society of Korea, 12(5), pp.1~10 (2008)
- Ko DW, "Correlation of Experimental ana Analytical Inelastic Responses of 1 : 12 Scale Irregular High-Rise RC Buildings", Journal of the Earthquake Engineering Society of Korea, 11(2), pp.95~104 (2007)
- Wong PS, "Vector2 & Formworks user’s manual second edition", University of Toronto, ~ (2013)
- Vecchio FJ, "The modified compression-field theory for reinforced concrete elements subjected to shear", ACI J, 83(2), pp.219~231 (1986)
- Collins MP, "Prestressed concrete structures" (1991), Prentice Hall
- Hordijk DA, "Local approach to fatigue of concrete", doctor, pp.1991
- Park HG, "Shear-strength degradation model for RC columns subjected to cyclic loading", Engineering Structures, 34, pp.187~197 (2012)