Nonlinear Seismic Response and Failure Behavior of reinforced Concrete Shear Wall Subjected to Base Acceleration

지반가속도에 의한 철근콘크리트 전단벽의 비선형 지진응답 및 파괴거동

  • 유영화 (성균관대학교 토목환경공학과) ;
  • 신현목 (성균관대학교 토목환경공학과)
  • Published : 1999.09.01

Abstract

A ground motion resulting from the destructive earthquakes can subject reinforced concrete members to very large forces. The reinforced concrete shear walls are designed as earthquake-resistant members of building structure in order to prevent severe damage due to the ground motions. The current research activities on seismic behavior of reinforced concrete member under ground motions have been limited to the shaking table test or equivalent static cyclic test and the obtained results have been summarized and proposed for the seismic design retrofit of structural columns or shear walls. The present study predicted the seismic response and failure behavior of reinforced concrete shear wall subjected to base acceleration using the finite element method. A decrease in strength and stiffness, yielding of reinforcing bar, and repetition of crack closing and opening due to seismic load with cyclic nature are accompanied by the crack which is necessarily expected to take place in concrete member. In this study the nonlinear material models for concrete and reinforcing bar based on biaxial stress field and algorithm of dynamic analysis were combined to construct the analytical program using the finite element method. The analytical seismic response and failure behaviors of reinforced concrete shear wall subjected to several base accelerations were compared with reliable experimental result.

지진가속도에 의한 부재의 지진거동 특성은 실험적인 방법 또는 등가의 정적실험으로부터 추정되어 온 것이 대부분이다 본 연구에서는 지진가속도에 의한 철근콘크리트 전단벽체의 지진응답 및 파괴거동 특성을 유한요소법을 사용한 해석적인 기법에 의해서 예측하였다 콘크리트 부재에서 균열은 필연적으로 발생하게 되며 이로 인한 부재의 강도 및 강성의 감소 철근의 항복 및 하중의 반복성으로 인한 균열의 개폐등이 수반된다 본 연구에서는 이와 같은 콘크리트와 철근의 비선형 특성을 고려한 이축응력상태에 대한 재료모델과 동적해석 알고리즘을 범용 수치해석기법인 유한요소법을 사용하여 해석프로그램으로 구현하였다 지진가속도를 받는 전단벽을 대상으로 지진응답 및 파괴거동등을 본 연구의 해석적인 방법으로 예측하였으며 그 결과를 신뢰성 있는 연구자의 실험결과와 비교하여 그 타당성을 검증하였다.

Keywords

References

  1. state of the art report RC frames under earthquake loading Comite Euro-International Du Beton
  2. Finite Element Procedures Bathe, K. J.
  3. state of the art report RC elements under cyclic loading Comite Euro-International Du Beton
  4. Journal of the structural Engineering v.110 no.8 Cracking in reinforced concrete analysis Gupta, A. K.;Akbar, H.
  5. ACI Journal v.82 no.6 Constitutive model for cracked concrete Cervenka, V.
  6. Proceedings of JSCE no.331 Strength and deformation characteristics of reinforced concrete shell elements subjected to inplane forces Aoyagi, Y.;Tamada, K.
  7. Journal of faculty of engineering v.37 no.2 The deformational behavior and constitutive equation of concrete using elasto-plastic and fracture model Maekawa, K.;Okmura, H.
  8. The response of reinforced concrete to inplane shear and normal stresses Collins, M. P.;Vecchio, F. J.
  9. Nonlinear Analysis and Constitutive Models of Reinforced Concrete Okamura, H.;Maekawa, K.
  10. Journal of Earthquake Engineering Society of Korea v.3 no.1 Material and geometrical nonlinear analysis of reinforced concrete columns under cyclic loading Yoo, Y. H.;Kim, W. H.;Shin, H. M.
  11. Proceedings of JSCE v.378 no.V-6 Average stress-strain relationship in post yield range of steel bar in concrete Tamai, S.;Shima, H.;Izumo, J.;Okamura, H.
  12. Concrete Engineering v.26 no.1 Contact density model for stress transfer across cracks in concrete Li, B.;Maekawa, K.
  13. Ph.D. Dissertation, University of Tokyo Finite Element Analysis of Reinforced Concrete Members Subjected to Load Reversals Shin, H. M.
  14. Journal of the Faculty of Engineering v.39 no.2 Micro and macro models for bond behavior in reinforced concrete Shima, H.;Chou, L.;Okamura, H.
  15. Proceedings of Ninth World Conference on Earthquake Engineering v.Ⅳ Shake-table testing of small scale structural wall Elnashai, A. S.;Pilakoutas, K.;Ambraseys, N. N.