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Evaluation of Performance of Korean Existing School Buildings with Masonry Infilled Walls Against Earthquakes

조적조 비내력벽을 가진 기존 학교 구조물의 내진 성능평가

Moon, Ki Hoon;Jeon, Yong Ryul;Lee, Chang Seok;Han, Sang Whan
문기훈;전용률;이창석;한상환

  • Received : 2012.08.09
  • Accepted : 2012.11.23
  • Published : 2012.12.31

Abstract

In Korea, most existing school buildings have been constructed with moment frames with un-reinforced infill walls designed only considering gravity loads. Thus, the buildings may not perform satisfactorily during earthquakes expected in Korea. In exterior frames of the building, un-reinforced masonry infill walls with window openings are commonly placed, which may alter the structural behavior of adjacent columns due to the interaction between the wall and column. The objective of this study is to evaluate the seismic performance of existing school buildings according to the procedure specified in ATC 63. Analytical models are proposed to simulate the structural behavior of columns, infill walls and their interaction. The accuracy of the proposed model is verified by comparing the analytical results with the experimental test results for one bay frames with and without infill walls with openings. For seismic performance evaluation, three story buildings are considered as model frames located at sites having different soil conditions ($S_A$, $S_B$, $S_C$, $S_D$, $S_E$) in Korea. It is observed that columns behaves as a short columns governed by shear due to infill masonry walls with openings. The collapse probabilities of the frames under maximum considered earthquake ranges from 62.9 to 99.5 %, which far exceed the allowable value specified in ATC 63.

Keywords

School structure;Seismic performance evaluation;Short column effect;Masonry infill wall;Shear failure;ATC 63

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Cited by

  1. A Comparison Study of Equivalent Strut Models for Seismic Performance Evaluation of Masonry-Infilled Frame vol.18, pp.2, 2014, https://doi.org/10.5000/EESK.2014.18.2.079
  2. Seismic Behavior of Reinforced Concrete Moment Frames Retrofitted by Toggle Bracing System with High Density Friction Damper vol.18, pp.3, 2014, https://doi.org/10.5000/EESK.2014.18.3.133

Acknowledgement

Supported by : 한국연구재단