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Seismic Performance Enhancement of Exposed Column-base Plate Weak-axis Connections for Small-Sized Steel Buildings

소규모 철골조건축물을 위한 약축방향 노출형 주각부의 내진성능 향상

  • You, Young-Chan (Department of Building Safety Research Center, Korea Institute of Civil Engineering and Building Technology (KICT))
  • 유영찬 (한국건설기술연구원 국민생활연구본부, 건축안전연구센터)
  • Published : 2019.09.01

Abstract

The purpose of this study is to enhance the seismic performance of exposed column-base plate weak-axis connections for small-sized steel buildings. According to the site inspection for the small-sized building construction, the arbitrary connection details in steel buildings have been applied at the job site, which is considered to be insufficient to guarantee structural safety and stability considering the increased seismic risk in Korea. Therefore, a series of test programs had been done to develop enhanced connection details in order to ensue the adequate seismic stability and safety of small-sized steel buildings. From the test results, It was found that the exposed column-base plate weak-axis connections commonly used in Korea shows very poor seismic behavior due to the "Rocking" phenomena caused by the residual plastic deformation of anchor bolts between anchor plate and concrete. A series of hysteretic tests for finding that solution were conducted to reduce the "Rocking" phenomena of the column-base plate connections, and local buckling of webs in H-column. Finally the enhanced stable seismic behavior was obtained by reinforcing at least 8 anchor bolts with good bonding strength and stiffeners to the webs in H-column.

Keywords

Small-sized steel buildings;Exposed column-base plate weak-axis connection;Seismic performance;Rocking;Anchor bolts;Energy dissipation capacity

Acknowledgement

Supported by : 국토교통과학기술진흥원

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