코어 외 추가 벽체와 기둥 띠철근 간격이 필로티 건물의 내진성능에 미치는 영향
Effect of Stirrup Spacing of Columns and an Additional Wall other than Core Walls on the Seismic Performance of Piloti-type Buildings
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For low-rise piloti-type buildings that suffered significant damage in the Pohang earthquake, the seismic performance of those designed by codes issued before and after the earthquake has been recently revised. This study started with the expectation that many of the requirements presented in the current codes may be excessive, and among them, the spacing of column stirrup could be relaxed. In particular, the recently revised design code of concrete structures for buildings, KDS 41 20 00, suggests that the column stirrup spacing is 1/2 of the minimum cross-sectional size or 200 mm, which is strengthened compared to KBC 2016, but relaxed than the current KDS, 41 17 00, which is 1/4 of the minimum size or 150 mm. As a result of the study, it was found that the target performance level was sufficiently satisfied by following the current standards and that it could be satisfied even if the relaxed spacing was followed. Therefore, the strict column stirrup spacing of KDS 41 17 00 could be relaxed if a wall other than core walls is recommended in the current guideline for the structural design of piloti-type buildings.
Abstract
For low-rise piloti-type buildings that suffered significant damage in the Pohang earthquake, the seismic performance of those designed by codes issued before and after the earthquake has been recently revised. This study started with the expectation that many of the requirements presented in the current codes may be excessive, and among them, the spacing of column stirrup could be relaxed. In particular, the recently revised design code of concrete structures for buildings, KDS 41 20 00, suggests that the column stirrup spacing is 1/2 of the minimum cross-sectional size or 200 mm, which is strengthened compared to KBC 2016, but relaxed than the current KDS, 41 17 00, which is 1/4 of the minimum size or 150 mm. As a result of the study, it was found that the target performance level was sufficiently satisfied by following the current standards and that it could be satisfied even if the relaxed spacing was followed. Therefore, the strict column stirrup spacing of KDS 41 17 00 could be relaxed if a wall other than core walls is recommended in the current guideline for the structural design of piloti-type buildings.
참고문헌 (15)
- Ministry of Land, Infrastructure and Transport, "The Regulations on Standards, etc. for Housing Construction", ~ (2020)
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- A study on establishment of earthquake disaster prevention measures for piloti-type buildings, etc, "Architectural Institute of Korea", Ministry of Land, Infrastructure and Transport of Korea, ~ (2018)
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- Ministry of Land, Infrastructure and Transport, "Guideline for structural design of piloti-type buildings", ~ (2018)
- Ministry of Land, Infrastructure and Transport, "Seismic design code for buildings (KDS 41 17 00)", ~ (2019)
- Joo C, "Seismic Fragility of Low-rise Piloti Buildings Designed According to KDS 41 17 00", EESK J Earthquake Eng, 26(2), pp.49~58 (2022)
- Kim J, "Seismic fragility function for existing low-rise piloti-type buildings reflecting damage from Pohang earthquake", EESK J Earthquake Eng, 25(6), pp.251~259 (2021)
- Ministry of Land, Infrastructure and Transport, "Design code of reinforcement detail of concrete structures (KDS 14 20 50)", ~ (2022)
- Ministry of Land, Infrastructure and Transport, "Design code of concrete structure for buildings (KDS 41 20 00)", ~ (2022)
- Seismic performance evaluation and rehabilitation guidelines of existing buildings, "Korea Authority of Land and Infrastructure Safety", ~ (2021)
- CSI, "Perform-3D, Ver. 6.0", Computers and Structures, Inc, ~ (2016)
- ASCE, "Seismic evaluation and retrofit of existing buildings (ASCE", SEI 41-13), 2013
- "PEER Ground Motion Database"[URL]