Beam-Column Element Applicable to Nonlinear Seismic Analysis

비선형 지진 해석을 위한 보-기둥 요소

  • Received : 1997.11.07
  • Published : 1997.12.30

Abstract

The objective of the study in this paper was to develop a beam-column element to model members with purely flexural yielding, as well as members with yielding under combined flexure and axial force during severe earthquake ground motins. The developed element can be considered as an one-component series hinge type model. It has the capability to model plastic axial deformation and changes in axial stiffness, and employs hardening rules to handle monotonic, cyclic or arbitrary loading. In general, when compared to experimental results and fiber model predictions, the element showed significantly better performance than the bilinear hinger model and could properly model the beam-column behavior of bare steel members in moment resisting frames. The developed element can more accurately predict local deformation demands and overall responses of structural systems under earthquake loadings than the bilinear hinge element.

이 연구의 목적은 매우 큰 지진하에 휨 모멘트에 의해서만 항복하는 부재와 휨 모멘트와 축 방향력에 의하여 항복하는 부재를 모델 할 수 있는 보-기둥 요소를 개발하는데 있다. 이 요소는 직렬 힌지 모델 (one-component series hinge model)로 간주 될 수 있으며, 축 방향 강성도 변화와 축 방향 소성 변형을 고려 할 수 있고 또한 단조, 주기, 임의 하중 등을 적절히 모델 할 수 있는 경화 법칙 (hardening rules)을 고려한다. 일반적으로 이 요소는 실험 결과 및 화이버 모델 (fiber model)에 비교하여 볼 때 기존의 이직선 힌지 모델 (bilinear hinge model)보다 우수한 거동을 보였고 모멘트 저항 뼈대 구조물의 강 부재의 보-기둥 거동을 적절하게 모델 할 수 있었다. 개발된 보-기둥 요소는 지진 하중하에서 구조물의 전체적인 거동과 설계에 필요한 국부 변형량을 기존의 이직선 힌지 모델 보다 매우 정확하게 예측 할 수 있다.

Keywords

References

  1. Manual of Steel Construction-Allowable Stress Design American Institute of Steel Construction. Inc.
  2. Plasticity;Structural Mechanics Drucker, D.C.
  3. Cyclic Tests on Large Scale Steel Moment Connections;Research Report PMFSEL 92-2 Engelhardt, M.D.
  4. Parametric Studies on Inelastic Modeling of Steel Moment Frames;Technical Report SAC 95-05, the SAC Joint Venture Partnership Engelhardt, M.D.;Kim, K.D.(et al.)
  5. Refined Modeling of Reinforced Concrete Columns for Seismic Analysis;EERC Reports No. 84/03 Kaba, S.A.;Mahin, S.A.
  6. DRAIN-2D-A General Purpose Computer Program for Dynamic Analysis of Inelastic Plane Structures- With User's Guide;EERC Reports No. 73/6 and 73/22 Kanaan, A.E.;Powell, G.H.
  7. Development of Analytical Models for Earthquake Analysis of Steel Moment Frames;Research Report PMFSEL 95-2 Kim, K.D.;Engelhardt, M.D.
  8. Computational Models for Cyclic Plasticity Rate Dependence, and Creep in Finite Element Analysis;EERC Reports No. 82/26 Mosaddad, B.;Powell, G.H.
  9. Acta Mechanica v.7 no.2-3 An Attempt to Describe the Behavior of Metals under Cyclic Loads Using a More General Workhardening Model Mroz, Z.
  10. Seismic Design Studies of Low Rise Steel Frames Schiff, S.D.
  11. Seismic Performance of Weak-Column Strong-Beam Steel Moment Resisting Frames;Research Report Schneider, S.P.;Roeder, C.W.;Carpenter, J.E.
  12. Recommended Lateral Force Requirements Structural Engineers Association of California
  13. Steel Beam-Column Joints in Seismic Moment Resisting Frames;EERC Reports No. 88/19 Tsai, K.C.;Popov, E.P.
  14. Quarterly of Applied Mathematics v.17 A Modification of Prager's Hardening Rule Ziegler, H.