Experimental and numerical investigation of an exterior reinforced concrete beam-column joint subjected to shock loading

Anupoju Rajeev, Sai Sharath Parsi, Sudharshan N. Raman, Tuan Ngo, Amit Shelke

Research output: Contribution to journalArticle

Abstract

Beam-column joints are critical elements in a special moment resisting frames as they govern the structural behavior and failure mechanisms under extreme events such as earthquake, blast, and impact. This work was undertaken to investigate the dynamic response of a reinforced concrete (RC) external beam-column sub-assembly subjected to shockwave. To this effect, a well-instrumented shock tube setup was developed to investigate the dynamic response of the joint. The shock-induced transient displacement and acceleration were measured at discrete locations along the length of the beam, and the entire shock event was recorded using a high-speed video camera. The maximum displacements acquired through the experimental study are compared with the numerical and the analytical results. These joint assemblies were incorporated with various deficiencies such as a beam weak in shear, beam weak in flexure and column weak in shear, to account for limitations in design guidelines. The influence of confining reinforcements on the shock-resistant behavior of a beam-column joint is studied. Findings from the current research indicate that steel confinement conforming with seismic design criteria strengthens the joint assemblies when subjected to shockwave loading conditions. It is also found that additional transverse reinforcement arrests the development of shear cracks in the disturbed (D – region) of the joint. The results obtained from the finite element and analytical models agree well with the experimental results.

Original languageEnglish
Article number103473
JournalInternational Journal of Impact Engineering
Volume137
DOIs
Publication statusPublished - Mar 2020

Fingerprint

Reinforced concrete
Dynamic response
Reinforcement
D region
Shock tubes
Seismic design
High speed cameras
Video cameras
Analytical models
Earthquakes
Cracks
Steel

Keywords

  • Beam-column joints
  • FE analysis
  • Response spectrum
  • Seismic detailing
  • Shock response
  • Shock-tube

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Automotive Engineering
  • Aerospace Engineering
  • Safety, Risk, Reliability and Quality
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Experimental and numerical investigation of an exterior reinforced concrete beam-column joint subjected to shock loading. / Rajeev, Anupoju; Parsi, Sai Sharath; Raman, Sudharshan N.; Ngo, Tuan; Shelke, Amit.

In: International Journal of Impact Engineering, Vol. 137, 103473, 03.2020.

Research output: Contribution to journalArticle

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