비선형동적해석을 통한 건식 기계적이음을 갖는 프리캐스트 모멘트 골조의 동등성 평가
Evaluation of Emulative Level for Precast Moment Frame Systems with Dry Mechanical Splices by Using Nonlinear Dynamic Analysis
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참고문헌
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초록
This study presents code-compliant seismic details by addressing dry mechanical splices for precast concrete (PC) beam-column connections in the ACI 318-19 code. To this end, critical observations of previous test results on precast beam-column connection specimens with the proposed seismic detail are briefly reported in this study, along with a typical reinforced concrete (RC) monolithic connection. On this basis, nonlinear dynamic models were developed to verify seismic responses of the PC emulative moment-resisting frame systems. As the current design code allows only the emulative design approach, this study aims at identifying the seismic performances of PC moment frame systems depending on their emulative levels, for which two extreme cases were intentionally chosen as the non-emulative (unbonded self-centering with marginal energy dissipation) and fully-emulative connection details. Their corresponding hysteresis models were set by using commercial finite element analysis software. According to the current seismic design provisions, a typical five-story building was designed as a target PC building. Subsequently, nonlinear dynamic time history analyses were performed with seven ground motions to investigate the impact of emulation level or hysteresis models (i.e., energy dissipation performance) on system responses between the emulative and non-emulative PC moment frames. The analytical results showed that both the base shear and story drift ratio were substantially reduced in the emulative system compared to that of the non-emulative one, and it indicates the importance of the code-compliant (i.e., emulative) connection details on the seismic performance of the precast building.
Abstract
This study presents code-compliant seismic details by addressing dry mechanical splices for precast concrete (PC) beam-column connections in the ACI 318-19 code. To this end, critical observations of previous test results on precast beam-column connection specimens with the proposed seismic detail are briefly reported in this study, along with a typical reinforced concrete (RC) monolithic connection. On this basis, nonlinear dynamic models were developed to verify seismic responses of the PC emulative moment-resisting frame systems. As the current design code allows only the emulative design approach, this study aims at identifying the seismic performances of PC moment frame systems depending on their emulative levels, for which two extreme cases were intentionally chosen as the non-emulative (unbonded self-centering with marginal energy dissipation) and fully-emulative connection details. Their corresponding hysteresis models were set by using commercial finite element analysis software. According to the current seismic design provisions, a typical five-story building was designed as a target PC building. Subsequently, nonlinear dynamic time history analyses were performed with seven ground motions to investigate the impact of emulation level or hysteresis models (i.e., energy dissipation performance) on system responses between the emulative and non-emulative PC moment frames. The analytical results showed that both the base shear and story drift ratio were substantially reduced in the emulative system compared to that of the non-emulative one, and it indicates the importance of the code-compliant (i.e., emulative) connection details on the seismic performance of the precast building.
참고문헌 (16)
- Zhang W, "Seismic Performance of Self-Sustaining Precast Wide Beam-Column Connections for Fast-Built Construction", Computer and Concrete, 33(3), pp.339~349 (2023)
- Choi HK, "Hysteretic Behavior and Seismic Resistant Capacity of Precast Concrete Beam-to-Column Connections", EESK J Earthquake Eng, 14(4), pp.61~71 (2010)
- Sung HS, "Quasi-Static and Shaking Table Tests of Precast Concrete Structures Utilizing Clamped Mechanical Splice", EESK J Earthquake Eng, 27(1), pp.37~47 (2023)
- Zhang W, "Seismic Performance of Precast Wide Beam-Column Connections with Asymmetrical Anchorage Reinforcement Details", Engineering Structures, 275, pp.115237~ (2023)
- Kim SH, "Seismic Performance Evaluation of Dry Precast Concrete Beam-Column Connections with Special Moment Frame Details", EESK J Earthquake Eng, 27(5), pp.203~211 (2023)
- MORIT, "Seismic Design Standard for Concrete Structures (KDS 14 20 80)", Ministry of Land, Infrastructure and Transport, 24~ (2021)
- "KS D 0249. Method of Inspection for Mechanical Splicing Joint of Bars for Concrete Reinforcement", Korean Standard Association, ~ (2019)
- MORIT, "Precast Concrete Structure Design Standard (KDS 14 2062)", Ministry of Land, Infrastructure and Transport, 14~ (2021)
- Acceptance Criteria for Moment Frames based on structural testing and commentary, "ACI Committee 374", American Concrete Institute, 9~, pp.ACI 374.1-05 (2005)
- Kim SH, "Seismic Performance Evaluation of Dry Precast Concrete Beam-Column Connections with Intermediate Moment Frame Details", EESK J Earthquake Eng, 27(3), pp.129~137 (2023)
- ACI Committee 374, "ACI 374.2-13 Guide for Testing Reinforced Concrete Structural Elements under Slowly Applied Simulated Seismic Loads", American Concrete Institute, 18~ (2013)
- Lee JY, "Emulation Evaluation of Precast Concrete Structures", Journal of the Korea Concrete Institute, 34(6), pp.633~644 (2022)
- Korea Construction Standard Center, "Seismic Building Design Code (KDS 41 17 00)", ~ (2019)
- Nonlinear Time History Analysis of Architectural Structures for Performance-Based Design, "MIDAS IT", MIDAS GEN, ~ (2022)
- Seismic Evaluation and Retrofit of Existing Buildings, "American Society of Civil Engineers", ~, pp.ASCE (2017), SEI 41-17
- Minimum Design Loads and Associated Criteria for Buildings and Other Structure, "American Society of Civil Engineers", ~, pp.ASCE (2022), SEC 7-22