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2019 Vol.15, Issue 3 Preview Page
September 2019. pp. 418-426
Abstract
Purpose: After analyzing the seismic capability of low-rise RC grid structures with insufficient seismic performance, the purpose of the project is to install steel slab hysteretic dampers (SSHD) to improve the seismic performance of beams and columns, and to suggest measures to minimize damage to the structure and human damage when an earthquake occurs. Method: The evaluation of the seismic performance of a structure is reviewed based on the assumption that the seismic performance is identified for the grid-type subway systems that are not designed to be seismic resistant and the installation of an SSHD system, a method that minimizes construction period, if insufficient, is required. Result: After the application and reinforce of structure with SSHD, and the results of eigenvalue analysis are as follows. The natural periodicity of longitudinal direction was 0.55s and that of vertical direction was 0.58s. Conclusion: As results of cyclic load test of structure with SSHD, the shear rigidity of damper is 101%, the energy dissipation rate is 108% and, plastic rotation angle of all column and beam is satisfied for I0 level and therefore it is judged that the reinforce effect is sufficient.
연구목적: 내진성능이 부족한 중·저층의 RC 격자 구조물의 내진능력을 해석한 후, 보와 기둥의 내진성능 개선을 위해 강재 슬래브 이력형 댐퍼( SSHD)를 설치하고, 지진이 발생할 때 구조물의 손상 및 인적피해를 최소화 하는 방안을 제시하는 데 그 목적이 있다. 연구방법: 내진설계가 되지 않은 격자 형태의 전철 역사를 대상으로 내진성능을 파악하고, 내진성능이 부족할 경우 공기를 최소화 할 수 있는 방법인 SSHD 시스템을 설치하는 것으로 가정하여 구조물의 내진성능 평가 및 보강을 검토한다. 연구결과: SSHD를 적용하여 구조물을 보강한 후, 고유치 해석을 수행한 결과 장변방향으로는 0.548s의 고유주기를 나타내었으며, 단변방향으로는 0.593s의 고유주기를 가지고 있는 것으로 나타났다. 결론: SSHD에 대하여 반복하중 실험을 수행 한 결과, 댐퍼의 전단강성은 103%, 에너지소산량은 111% 및 109%로 나타나고, 모든 기둥과 보 부재의 소성회전각은 I0수준을 만족하는 것으로 나타나 보강효과가 충분할 것으로 판단된다.
References
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  2. Han, S.W., Kim, J.Y., Moon, K.H., Lee, C.S. (2014). “Seismic Behavior of Reinforced Concrete Moment Frames Retofitted by Toggle Bracing System with High Density Friction Damper.” Journal of Earthquake Engineering Society of Korea, Vol. 18, No. 3, pp. 135-138.10.5000/EESK.2014.18.3.133
  3. Hur, M.W., Chun, Y.S., Hwang, J.S., Lee, K.S. (2015). “Seismic Performance Evaluation of R/C Frame Apartment Strengthened with Kagome Truss Damper External Connection Method by Pseudo Dynamic Test.” Journal of Korea Institute for Structural Maintenance and Inspection, Vol. 19, No. 1, pp 24-29.10.11112/jksmi.2015.19.1.023
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Information
  • Publisher :The Korean Society of Disaster Information
  • Publisher(Ko) :한국재난정보학회
  • Journal Title :Journal of the Society of Disaster Information
  • Journal Title(Ko) :한국재난정보학회논문집
  • Volume : 15
  • No :3
  • Pages :418-426