Seismic testing and numerical analysis of beam-column knee joints in recycled-aggregate concrete frames

Bo Hu; Tribikram Kundu

doi:10.14359/51718017

Seismic testing and numerical analysis of beam-column knee joints in recycled-aggregate concrete frames

Bo Hu
, Tribikram Kundu

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

Post-earthquake investigations have shown that the beam-column joint is one of the weakest links in reinforced concrete momentresisting frames under severe ground motions. An extensive study on natural aggregate concrete (NAC) beam-column joints has been conducted. However, few studies have examined the seismic performance of beam-column joints made with recycled aggregate concrete (RAC), especially for RAC roof-level exterior beamcolumn joints. In this paper, a series of RAC roof-level exterior beam-column joints were fabricated and subjected to reversed cyclic loadings. The ductility capacity, energy dissipation capacity, equivalent viscous damping, and load-deformation behavior of each specimen were evaluated. OpenSees was adopted to perform the finite element analyses. The numerical simulation predictions show good agreement with test results. The equations for joint shear strength determination proposed in this work exhibit a better correlation between experimental and theoretical values.

Original language	English (US)
Pages (from-to)	119-132
Number of pages	14
Journal	ACI Structural Journal
Volume	117
Issue number	1
DOIs	https://doi.org/10.14359/51718017
State	Published - 2020

Keywords

Beam-column joints
Recycled aggregate concrete
Seismic behavior
Shear strength

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction

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10.14359/51718017

Cite this

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title = "Seismic testing and numerical analysis of beam-column knee joints in recycled-aggregate concrete frames",

abstract = "Post-earthquake investigations have shown that the beam-column joint is one of the weakest links in reinforced concrete momentresisting frames under severe ground motions. An extensive study on natural aggregate concrete (NAC) beam-column joints has been conducted. However, few studies have examined the seismic performance of beam-column joints made with recycled aggregate concrete (RAC), especially for RAC roof-level exterior beamcolumn joints. In this paper, a series of RAC roof-level exterior beam-column joints were fabricated and subjected to reversed cyclic loadings. The ductility capacity, energy dissipation capacity, equivalent viscous damping, and load-deformation behavior of each specimen were evaluated. OpenSees was adopted to perform the finite element analyses. The numerical simulation predictions show good agreement with test results. The equations for joint shear strength determination proposed in this work exhibit a better correlation between experimental and theoretical values.",

keywords = "Beam-column joints, Recycled aggregate concrete, Seismic behavior, Shear strength",

author = "Bo Hu and Tribikram Kundu",

note = "Funding Information: The authors acknowledge the support of the National Natural Science Foundation of China (Grant No. 51508554) and the Natural Science Foundation of Jiangsu Province (Grant No. BK20150190). The first author gratefully acknowledges the China Scholarship Council (No. 201706425058) for the financial support of study at the University of Arizona and the support from the Postdoctoral Science Foundation of Jiangsu Province (No. 1402062C) and the Fundamental Research Funds for the Central Universities (No. 2015QNB12). The assistance from Y. Yang in drawing and processing illustrations in this paper is greatly appreciated. Funding Information: The authors acknowledge the support of the National Natural Science Foundation of China (Grant No. 51508554) and the Natural Science Foun- dation of Jiangsu Province (Grant No. BK20150190). The first author gratefully acknowledges the China Scholarship Council (No. 201706425058) for the financial support of study at the University of Arizona and the support from the Postdoctoral Science Foundation of Jiangsu Province (No. 1402062C) and the Fundamental Research Funds for the Central Universities (No. 2015QNB12). The assistance from Y. Yang in drawing and processing illustrations in this paper is greatly appreciated. Publisher Copyright: Copyright {\textcopyright} 2020 American Concrete Institute. All rights reserved.",

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doi = "10.14359/51718017",

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volume = "117",

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PY - 2020

Y1 - 2020

N2 - Post-earthquake investigations have shown that the beam-column joint is one of the weakest links in reinforced concrete momentresisting frames under severe ground motions. An extensive study on natural aggregate concrete (NAC) beam-column joints has been conducted. However, few studies have examined the seismic performance of beam-column joints made with recycled aggregate concrete (RAC), especially for RAC roof-level exterior beamcolumn joints. In this paper, a series of RAC roof-level exterior beam-column joints were fabricated and subjected to reversed cyclic loadings. The ductility capacity, energy dissipation capacity, equivalent viscous damping, and load-deformation behavior of each specimen were evaluated. OpenSees was adopted to perform the finite element analyses. The numerical simulation predictions show good agreement with test results. The equations for joint shear strength determination proposed in this work exhibit a better correlation between experimental and theoretical values.

AB - Post-earthquake investigations have shown that the beam-column joint is one of the weakest links in reinforced concrete momentresisting frames under severe ground motions. An extensive study on natural aggregate concrete (NAC) beam-column joints has been conducted. However, few studies have examined the seismic performance of beam-column joints made with recycled aggregate concrete (RAC), especially for RAC roof-level exterior beamcolumn joints. In this paper, a series of RAC roof-level exterior beam-column joints were fabricated and subjected to reversed cyclic loadings. The ductility capacity, energy dissipation capacity, equivalent viscous damping, and load-deformation behavior of each specimen were evaluated. OpenSees was adopted to perform the finite element analyses. The numerical simulation predictions show good agreement with test results. The equations for joint shear strength determination proposed in this work exhibit a better correlation between experimental and theoretical values.

KW - Beam-column joints

KW - Recycled aggregate concrete

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KW - Shear strength

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JO - ACI Structural Journal

JF - ACI Structural Journal

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Seismic testing and numerical analysis of beam-column knee joints in recycled-aggregate concrete frames

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Keywords

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