Structural Engineering and Mechanics

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Strain penetration of high-strength steel bars anchored in reinforced concrete beam-column connections

  • Li, Ling (School of Civil Engineering, Harbin Institute of Technology) ;
  • Zheng, Wenzhong (School of Civil Engineering, Harbin Institute of Technology) ;
  • Wang, Ying (School of Civil Engineering, Harbin Institute of Technology)
  • Received : 2018.07.23
  • Accepted : 2019.08.27
  • Published : 2019.11.10
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Abstract

This paper presents experimental and analytical investigations on additional fixed-end rotations resulting from the strain penetration of high-strength reinforcement in reinforced concrete (RC) beam-column connections under monotonic loading. The experimental part included the test of 18 interior beam-column connections with straight long steel bars and 24 exterior beam-column connections with hooked and headed steel bars. Rebar strains along the anchorage length were recorded at the yielding and ultimate states. Furthermore, a numerical program was developed to study the effect of strain penetration in beam-column connections. The numerical results showed good agreement with the test results. Finally, 87 simulated specimens were designed with various parameters based on the test specimens. The effect of concrete compressive strength ($f_c$), yield strength ($f_y$), diameter ($d_b$), and anchorage length ($l_{ah}$) of the reinforcement in the beam-column connection was examined through a parametric study. The results indicated that additional fixed-end rotations increased with a decrease in $f_c$ and an increase in $f_y$, $d_b$ and $l_{ah}$. Moreover, the growth rate of additional fixed-end rotations at the yielding state was faster than that at the ultimate state when high-strength steel bars were used.

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China (NSFC)

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Cited by

  1. Seismic Behavior of RC Beam Column Joints with 600 MPa High Strength Steel Bars vol.10, pp.13, 2019, https://doi.org/10.3390/app10134684