Steel and Composite Structures

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Full-scale tests of two-story RC frames retrofitted with steel plate multi-slit dampers

  • Received : 2020.04.26
  • Accepted : 2021.05.17
  • Published : 2021.06.10
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Abstract

There is a growing need of seismic retrofit of existing non-seismically designed structures in Korea after the 2016 Gyeongju and 2017 Pohang earthquakes, especially school buildings which experienced extensive damage during those two earthquakes. To this end, a steel multi-slit damper (MSD) was developed in this research which can be installed inside of partition walls of school buildings. Full-scale two-story RC frames were tested with and without the proposed dampers. The frames had structural details similar to school buildings constructed in the 1980s in Korea. The details of the experiments were described in detail, and the test results were validated using the analysis model. The developed seismic retrofit strategy was applied to a case study school building structure, and its seismic performance was evaluated before and after retrofit using the MSD. The results show that the developed retrofit strategy can improve the seismic performance of the structure to satisfy a given target performance level.

Keywords

Acknowledgement

This research was carried out by research funding (task number 21CTAP-C152050-03) of the Ministry of Land, Infrastructure and Transport, Land Transport Technology Promotion Research Project.

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