Journal of the Korean Institute of Educational Facilities (교육시설 논문지)

Korean Institute of Educational Facilities (한국교육시설학회)
권호 표지
DOI QR코드

DOI QR Code

Structural Performance of Stud Shear Connections using SHCC between Existing School Building Frame and Seismic Retrofitting Elements

기존 학교건물 골조와 내진보강요소 일체화를 위한 변형경화형 시멘트 복합체를 적용한 스터드 전단 접합부의 구조성능

  • Received : 2013.03.18
  • Accepted : 2013.07.19
  • Published : 2013.07.30
Download PDF
⟨ Previous Next ⟩

Abstract

Some results of experimental investigation conducted to assess the effect of cement composite strength and ductility on the shear behavior and crack-damage mitigation of stud connections between existing reinforced concrete frame in school buildings and seismic strengthening elements from cyclically direct shear tests are described. The cement composite strengths include 50 for medium strength and 70 MPa for high strength. Two types of cement composites, strain-hardening cement composite (SHCC) and non-shrinkage mortar, are used for stud shear connection specimens. The special SHCCs are reinforced with hybrid 0.2% polyethylene (PE) and 1.3% polyvinyl alcohol (PVA) fibers at the volume fraction and exhibits tensile strain capacity ranging from 0.2 to 0.5%. Test result indicates that SHCC improves the seismic performance and crack-damage mitigation of stud shear connections compared with stud connections with non-shrinkage mortar. However, the performance enhancement in SHCC stud connections with transverse and longitudinal reinforcements is less notable for those without additional reinforcement.

Keywords

References

  1. National Emergency Management Agency, 'Result notice of the promotion of public facilities seismic strengthening existing measures in 2011', 2012. (http://www.nema.go.kr)
  2. Lee, Kang Seok, A New Methodology for Seismic Capacity Evaluation of Low-rise R/C Buildings, Journal of the Korea institute for Structural Maintenance Inspection, 15(3), pp.106-115, 2011. https://doi.org/10.11112/jksmi.2011.15.3.106
  3. Ahn, Tae-Sang, Kim, Hyung-Joon, Efficient Seismic Retrofit of Retrofit of Existing Structures, Journal of the Architectural Institute of Korea, 52(10), pp.62-69, 2008.
  4. Ryu, Seung-Hyun, Yun, Hyun-Do, Kim, Sun-Woo, Lee Kang-Seok, Kim, Yong-Cheol, Nonlinear Behavior of Seismic-Strengthened Domestic School Building, Journal of the Korea institute for Structural Maintenance Inspection,, 15(1), pp.243-253, 2011. https://doi.org/10.11112/jksmi.2011.15.1.243
  5. Youn, Gil-Ho, Kim, Sung-Ho, Kim, Youn-Cheol, Yun, Hyun-do, Seismic Retrofit of an Existing School Building using CIP-Infilled Shear Walls and Steel Braces, ournal of the Korean Institute of Educational Facilities, 19(4), pp. 21-28, 2012. https://doi.org/10.7859/kief.2012.19.4.021
  6. Japan civil Manabu Concert, Multiple Fine Cracks Type Fiber Reinforced Cement Composite Material Design. Construction Guidelines (draft), 2008, pp.16-18
  7. (財) Japan General Building Research Laboratory structural part, "Seismic strengthening design and construction guidelines of the wall of the sim concrete", 2001.