Advances in concrete construction

  • 제9권3호
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  • Pages.235-248
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  • 2020
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  • 2287-5301(pISSN)
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  • 2287-531X(eISSN)
테크노프레스 (Techno-Press)
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Experimental and numerical studies of precast connection under progressive collapse scenario

  • Joshi, Digesh D. (Civil Engineering Department, School of Engineering, Institute of Technology, Nirma University) ;
  • Patel, Paresh V. (Civil Engineering Department, School of Engineering, Institute of Technology, Nirma University) ;
  • Rangwala, Husain M. (Civil Engineering Department, School of Engineering, Institute of Technology, Nirma University) ;
  • Patoliya, Bhautik G. (Civil Engineering Department, School of Engineering, Institute of Technology, Nirma University)
  • 투고 : 2018.05.28
  • 심사 : 2020.01.18
  • 발행 : 2020.03.25
⟨ 이전 논문 다음 논문 ⟩

초록

Progressive collapse in a structure occurs when load bearing members are failed and the adjoining structural elements cannot resist the redistributed forces and fails subsequently, that leads to complete collapse of structure. Recently, construction using precast concrete technology is adopted increasingly because it offers many advantages like faster construction, less requirement of skilled labours at site, reduced formwork and scaffolding, massive production with reduced amount of construction waste, better quality and better surface finishing as compared to conventional reinforced concrete construction. Connections are the critical elements for any precast structure, because in past, major collapse of precast structure took place because of connection failure. In this study, behavior of four different precast wet connections with U shaped reinforcement bars provided at different locations is evaluated. Reduced 1/3rd scale precast beam column assemblies having two span beam and three columns with removed middle column are constructed and examined by performing experiments. The response of precast connections is compared with monolithic connection, under column removal scenario. The connection region of test specimens are filled by cast-in-place micro concrete with and without polypropylene fibers. Performance of specimen is evaluated on the basis of ultimate load carrying capacity, maximum deflection at the location of removed middle column, crack formation and failure propagation. Further, Finite element (FE) analysis is carried out for validation of experimental studies and understanding the performance of structural components. Monolithic and precast beam column assemblies are modeled using non-linear Finite Element (FE) analysis based software ABAQUS. Actual experimental conditions are simulated using appropriate boundary and loading conditions. Finite Element simulation results in terms of load versus deflection are compared with that of experimental study. The nonlinear FE analysis results shows good agreement with experimental results.

키워드

과제정보

연구 과제 주관 기관 : Science & Engineering Research Board (SERB)

The authors gratefully acknowledge the financial support through research project number SB/S3/CEE/0028/2013, provided by Science & Engineering Research Board (SERB), Department of Science & Technology (DST), New Delhi, India.

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