Experimental study on seismic behavior of reinforced concrete frame in primary and middle schools with different strengthening methods

Bo Hu; Heng Lin Lv; Tribikram Kundu

doi:10.1016/j.conbuildmat.2019.05.040

Experimental study on seismic behavior of reinforced concrete frame in primary and middle schools with different strengthening methods

Bo Hu, Heng Lin Lv, Tribikram Kundu

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

36 Scopus citations

Abstract

Due to inadequate lateral stiffness and insufficient structural redundancy, many single-span reinforced concrete (RC) frames were highly damaged or collapsed in previous earthquakes. This paper presents an experimental study on seismic performance of rehabilitated single-span RC frames. Four frames were strengthened using various retrofitting strategies and one non-retrofitted frame served as the reference specimen. All these frames were fabricated and tested under cyclic loadings. The failure modes, hysteretic behavior, skeleton curve, energy dissipation, strength and stiffness degradation of each frame were evaluated. The validity of different strengthening methods for improving frames’ failure mechanisms and seismic performances was verified. Test results indicated that strength, stiffness, as well as many seismic characteristics of the strengthened frames were improved substantially.

Original language	English (US)
Pages (from-to)	473-486
Number of pages	14
Journal	Construction and Building Materials
Volume	217
DOIs	https://doi.org/10.1016/j.conbuildmat.2019.05.040
State	Published - Aug 30 2019

Keywords

Ductility
Exterior cantilever frame
Retrofitting
Seismic performance
Strengthening

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2019.05.040

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title = "Experimental study on seismic behavior of reinforced concrete frame in primary and middle schools with different strengthening methods",

abstract = "Due to inadequate lateral stiffness and insufficient structural redundancy, many single-span reinforced concrete (RC) frames were highly damaged or collapsed in previous earthquakes. This paper presents an experimental study on seismic performance of rehabilitated single-span RC frames. Four frames were strengthened using various retrofitting strategies and one non-retrofitted frame served as the reference specimen. All these frames were fabricated and tested under cyclic loadings. The failure modes, hysteretic behavior, skeleton curve, energy dissipation, strength and stiffness degradation of each frame were evaluated. The validity of different strengthening methods for improving frames{\textquoteright} failure mechanisms and seismic performances was verified. Test results indicated that strength, stiffness, as well as many seismic characteristics of the strengthened frames were improved substantially.",

keywords = "Ductility, Exterior cantilever frame, Retrofitting, Seismic performance, Strengthening",

author = "Bo Hu and Lv, {Heng Lin} and Tribikram Kundu",

note = "Funding Information: The authors acknowledge the support of the National Natural Science Foundation of China (Grant No. 51508554 ), the Natural Science Foundation of Jiangsu Province (Grant No. BK20150190 ), the Postdoctoral Science Foundation of Jiangsu Province (No. 1402062C ) and the Fundamental Research Funds for the Central Universities (No. 2015QNB12 ). The financial support is greatly appreciated. Bo Hu gratefully acknowledges the China Scholarship Council (No. 201706425058 ) for the financial support of study at the University of Arizona Arizona in the United States. Herein, the authors would like to thank Yuanrong Yang for her helps in drawing and processing some illustrations in this paper. Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = aug,

day = "30",

doi = "10.1016/j.conbuildmat.2019.05.040",

language = "English (US)",

volume = "217",

pages = "473--486",

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T1 - Experimental study on seismic behavior of reinforced concrete frame in primary and middle schools with different strengthening methods

AU - Hu, Bo

AU - Lv, Heng Lin

AU - Kundu, Tribikram

N1 - Funding Information: The authors acknowledge the support of the National Natural Science Foundation of China (Grant No. 51508554 ), the Natural Science Foundation of Jiangsu Province (Grant No. BK20150190 ), the Postdoctoral Science Foundation of Jiangsu Province (No. 1402062C ) and the Fundamental Research Funds for the Central Universities (No. 2015QNB12 ). The financial support is greatly appreciated. Bo Hu gratefully acknowledges the China Scholarship Council (No. 201706425058 ) for the financial support of study at the University of Arizona Arizona in the United States. Herein, the authors would like to thank Yuanrong Yang for her helps in drawing and processing some illustrations in this paper. Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/8/30

Y1 - 2019/8/30

N2 - Due to inadequate lateral stiffness and insufficient structural redundancy, many single-span reinforced concrete (RC) frames were highly damaged or collapsed in previous earthquakes. This paper presents an experimental study on seismic performance of rehabilitated single-span RC frames. Four frames were strengthened using various retrofitting strategies and one non-retrofitted frame served as the reference specimen. All these frames were fabricated and tested under cyclic loadings. The failure modes, hysteretic behavior, skeleton curve, energy dissipation, strength and stiffness degradation of each frame were evaluated. The validity of different strengthening methods for improving frames’ failure mechanisms and seismic performances was verified. Test results indicated that strength, stiffness, as well as many seismic characteristics of the strengthened frames were improved substantially.

AB - Due to inadequate lateral stiffness and insufficient structural redundancy, many single-span reinforced concrete (RC) frames were highly damaged or collapsed in previous earthquakes. This paper presents an experimental study on seismic performance of rehabilitated single-span RC frames. Four frames were strengthened using various retrofitting strategies and one non-retrofitted frame served as the reference specimen. All these frames were fabricated and tested under cyclic loadings. The failure modes, hysteretic behavior, skeleton curve, energy dissipation, strength and stiffness degradation of each frame were evaluated. The validity of different strengthening methods for improving frames’ failure mechanisms and seismic performances was verified. Test results indicated that strength, stiffness, as well as many seismic characteristics of the strengthened frames were improved substantially.

KW - Ductility

KW - Exterior cantilever frame

KW - Retrofitting

KW - Seismic performance

KW - Strengthening

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VL - 217

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JO - Construction and Building Materials

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ER -

Experimental study on seismic behavior of reinforced concrete frame in primary and middle schools with different strengthening methods

Abstract

Keywords

ASJC Scopus subject areas

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