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http://dx.doi.org/10.5000/EESK.2020.24.1.029

Seismic Performance Evaluation of Reinforced Concrete Buildings Strengthened by Embedded Steel Frame  

Kim, Seonwoong (School of Smart City Engineering, Youngsan University)
Lee, Kyungkoo (Department of Architectural Engineering, Dankook University)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.24, no.1, 2020 , pp. 29-37 More about this Journal
Abstract
This study is to investigate the effect of a retrofitted reinforced concrete frame with non-seismic details strengthened by embedded steel moment frames with an indirect joint, which mitigates the problems of the direct joint method. First, full-scale experiments were conducted to confirm the structural behavior of a 2-story reinforced concrete frame with non-seismic details and strengthened by a steel moment frame with an indirect joint. The reinforced concrete frame with non-seismic details showed a maximum strength of 185 kN at an overall drift ratio of 1.75%. The flexural-shear failure of columns was governed, and shear cracks were concentrated at the beam-column joints. The reinforced concrete frame strengthened by the embedded steel moment frames achieved a maximum strength of 701 kN at an overall drift ratio of 1.5% so that the maximum strength was about 3.8 times that of the specimen with non-seismic details. The failure pattern of the retrofitted specimen was the loss of bond strength between the concrete and the rebars of the columns caused by a prying action of the bottom indirect joint because of lateral force. Furthermore, methods are proposed for calculation of the specified strength of the reinforced concrete frame with non-seismic details and strengthened by the steel moment frame with the indirect joint.
Keywords
Reinforced concrete; Steel frame; Seismic; Retrofit; Lateral resistance capacity; Full-scale test;
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  • Reference
1 Korea Meteorological Administration. Earthquake Annual Report. KMA. c2017.
2 Hong TK, Lee J, Park S, Kim W. Time-advanced occurrence of moderate-size earthquake in a stable intraplate region after a megathrust earthquake and their seismic properties. Scientific Reports. 2018;8:13331.   DOI
3 Hankyoreh [Internet]. Yonhap News; 2016 Sep 13. Available from : http://www.hani.co.kr/arti/society/society_general/761224.html
4 Ministry of Education. Manual of seismic performance evaluation and retrofit for school facilities. c2018.
5 Ministry of Education (MOE) and Korea Institute of Educational Environment (KIEE). Guideline for Seismic Evaluation and Rehabilitation of Existing School Buildings in Korea. 2011:108. (in Korean)
6 Union Corporation [Internet]. Available from: http://www.unioncement.com/product/product02_01.php
7 HILTI Korea Corporation [Internet]. Available from: https://www.hilti.co.kr/c/CLS_FASTENER_7135/CLS_ANCHOR_RODS_ELEMENTS_7135
8 Korean Agency for Technology and Standards (KATS). Method of Tensile Test for Metallick Materials - KS B 0802. KATS. c2003.
9 Korean Agency for Technology and Standards (KATS). Standard Test Method for Making and Curing Concrete Specimens - KS F 2403. KATS. c2014.
10 Korean Agency for Technology and Standards (KATS). Standard Test for Compressive Strength of Concrete - KS F 2405. KATS. c2010.
11 ACI Committee 374. 374.1-05: Acceptance Criteria for Moment Frames Based on Structural Testing and Commentary. American Concrete Institute (ACI). Farmington Hills, MI, USA. c2006.
12 ACI Committee 318. Building Code Requirements for Structure Concrete (ACI 318-14). American Concrete Institute (ACI). Farmington Hills, MI, USA. c2014.
13 Architectural Institute of Korea (AIK). Korean Building Code and Commentary. AIK. c2016.