Seismic Performance of Interior and Exterior Beam-Column Joints in Recycled Aggregate Concrete Frames

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1 Citation (Scopus)

Abstract

The failure of beam-column joints in RC frame buildings induced by a strong earthquake can lead to the collapse of buildings. Therefore, numerous experimental studies have been carried out on beam-column joints made with natural aggregate concrete (NAC). However, only a few experimental tests have been conducted on recycled aggregate concrete (RAC) beam-column joints. This paper presents an experimental investigation of the seismic behavior of various types of RAC beam-column joints. A series of five RAC beam-column joint specimens, including three interior joints and two exterior joints, were tested under quasi-static cyclic loading and their behaviors were evaluated in terms of strength, stiffness, cumulative energy dissipation, damping ratio, and damage indexes at different load steps. The influence of joint type, column axial compression level, stirrup ratio in the joint panel, and longitudinal reinforcement ratio on the seismic performance of RAC joints was evaluated. The validity of RC joint shear strength models proposed by different building codes to predict RAC joint shear strength were examined by comparing the experimental shear strength values with analytical results.

Original languageEnglish (US)
Article number04018262
JournalJournal of Structural Engineering (United States)
Volume145
Issue number3
DOIs
StatePublished - Mar 1 2019

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Concrete aggregates
Shear strength
Axial compression
Energy dissipation
Earthquakes
Reinforcement
Damping
Stiffness

Keywords

  • Beam-column joints
  • Ductility
  • Recycled concrete
  • Seismic behavior
  • Shear strength

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Seismic Performance of Interior and Exterior Beam-Column Joints in Recycled Aggregate Concrete Frames",
abstract = "The failure of beam-column joints in RC frame buildings induced by a strong earthquake can lead to the collapse of buildings. Therefore, numerous experimental studies have been carried out on beam-column joints made with natural aggregate concrete (NAC). However, only a few experimental tests have been conducted on recycled aggregate concrete (RAC) beam-column joints. This paper presents an experimental investigation of the seismic behavior of various types of RAC beam-column joints. A series of five RAC beam-column joint specimens, including three interior joints and two exterior joints, were tested under quasi-static cyclic loading and their behaviors were evaluated in terms of strength, stiffness, cumulative energy dissipation, damping ratio, and damage indexes at different load steps. The influence of joint type, column axial compression level, stirrup ratio in the joint panel, and longitudinal reinforcement ratio on the seismic performance of RAC joints was evaluated. The validity of RC joint shear strength models proposed by different building codes to predict RAC joint shear strength were examined by comparing the experimental shear strength values with analytical results.",
keywords = "Beam-column joints, Ductility, Recycled concrete, Seismic behavior, Shear strength",
author = "Bo Hu and Tribikram Kundu",
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N2 - The failure of beam-column joints in RC frame buildings induced by a strong earthquake can lead to the collapse of buildings. Therefore, numerous experimental studies have been carried out on beam-column joints made with natural aggregate concrete (NAC). However, only a few experimental tests have been conducted on recycled aggregate concrete (RAC) beam-column joints. This paper presents an experimental investigation of the seismic behavior of various types of RAC beam-column joints. A series of five RAC beam-column joint specimens, including three interior joints and two exterior joints, were tested under quasi-static cyclic loading and their behaviors were evaluated in terms of strength, stiffness, cumulative energy dissipation, damping ratio, and damage indexes at different load steps. The influence of joint type, column axial compression level, stirrup ratio in the joint panel, and longitudinal reinforcement ratio on the seismic performance of RAC joints was evaluated. The validity of RC joint shear strength models proposed by different building codes to predict RAC joint shear strength were examined by comparing the experimental shear strength values with analytical results.

AB - The failure of beam-column joints in RC frame buildings induced by a strong earthquake can lead to the collapse of buildings. Therefore, numerous experimental studies have been carried out on beam-column joints made with natural aggregate concrete (NAC). However, only a few experimental tests have been conducted on recycled aggregate concrete (RAC) beam-column joints. This paper presents an experimental investigation of the seismic behavior of various types of RAC beam-column joints. A series of five RAC beam-column joint specimens, including three interior joints and two exterior joints, were tested under quasi-static cyclic loading and their behaviors were evaluated in terms of strength, stiffness, cumulative energy dissipation, damping ratio, and damage indexes at different load steps. The influence of joint type, column axial compression level, stirrup ratio in the joint panel, and longitudinal reinforcement ratio on the seismic performance of RAC joints was evaluated. The validity of RC joint shear strength models proposed by different building codes to predict RAC joint shear strength were examined by comparing the experimental shear strength values with analytical results.

KW - Beam-column joints

KW - Ductility

KW - Recycled concrete

KW - Seismic behavior

KW - Shear strength

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