Structural Engineering and Mechanics

  • 제92권4호
  • /
  • Pages.405-419
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  • 2024
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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New headed reinforcements for RC exterior beam-to-column joints. Experimental and numerical simulation

  • W. Balkis Banu (Department of Civil Engineering, College of Engineering Guindy, Anna University) ;
  • K.P. Jaya (Department of Civil Engineering, College of Engineering Guindy, Anna University)
  • 투고 : 2024.03.26
  • 심사 : 2024.11.13
  • 발행 : 2024.11.25
⟨ 이전 논문 다음 논문 ⟩

초록

In severe intensity seismic zones, the conventional detailing of reinforcement in the exterior beam-to-column joint causes congestion of steel that affects the ease of construction. This article evaluates the behaviour of exterior beam-column joints with different anchorage/connection methods suitable for avoiding steel congestion. Sub-assemblages having six-joint connections were cast and tested under reverse cyclic loading at the tip of the beam under displacement control. Of these, four connections are non-conventional reinforcement detailing were detailed as per ACI 352R-02 and IS-456 along with confinement as per IS-13920, Straight-Headed Bar, X Cross-Headed Bar and the remaining specimens are detailed as a conventional confined specimen. The experimental results from the specimens with different anchorages are compared with the monolithic connection. The study revealed that the X cross-headed bar considerably enhanced the joint's seismic performance in terms of strength, ductility, and energy dissipation. A numerical model (ABAQUS) that considers the nonlinear behaviour of steel and concrete in the beam-column joint is also considered in this study. The results of the experimental tests and the numerical differed by less than 10% on average. The developed headed-bar connection at the beam-column joint is evaluated by calculating the possible shear stress in the joints theoretically and the estimated values lie well within the values specified in standards/codes.

키워드

과제정보

This Research work is supported by the University Grants Commission (UGC) under the Moulana Azad National Fellowship for Minority Students (Award No: F1-17.1/2017-18/MANF-2017-18-TAM-77935/(SA-III/We bsite)), and the test is conducted at Structural Dynamics Laboratory, Anna University, Chennai. The authors are thankful to the University and the funding agency for their support.

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