점탄성 감쇠기를 설치한 강구조건물의 지진하중에 대한 거동 연구

Seismic Behavior of Viscoelastically Damped Steel-Frame Structures

  • 오순택 (연세대학교 산업기술연구소 토목공학 연구부 연구원)
  • 발행 : 1993.03.01

초록

본 논문은 에너지 분산장치의 일종인 점탄성 감쇠기를 설치한 건물의 거동에 관한 연구이다. 평상온도에서 뿐만아니라 높은 주변온도 하에서도 점탄성 감쇠기를 설치한 건물은 이를 설치하지 않은 건물에 비해서 구조응답이 현저히 감소함을 나타낸다. 감쇠기에 대한 실험에서 얻은 결과를 회귀분석하여 감쇠기의 동적특성을 산정할 수 있는 실험식을 유도한다. 감쇠기를 설치한 건물의 구조감쇠는 모드 변형에너지법과 유도된 실험식을 이용하여 성공적으로 예측할 수 있다. 또한, 점탄성 감쇠된 건물의 지진하중에 의한 동적 구조응답을 예측하기 위하여 수치모형해석을 수행한다. 수치모형해석의 결과는 실험결과와 잘 일치하는 것으로 나타나 일반적인 모드해석방법에 의해 점탄성 감쇠기를 설치한 건물의 동적거동을 정확하게 예측할 수 있음을 보여준다. 이러한 결과를 토대로, 점탄성 감쇠기를 설치한 건물에 대한 설계방법을 제시한다. 이 설계방법은 일반적인 건물의 설계에 감쇠비라는 설계요소를 추가함으로서 가능해진다.

This paper summarizes a study on the application of viscoelastic dampers as an energy dissipation device in the frame structure. It can be concluded that, even at high temperatures, the viscoelastically damped structure can achieve a significant reduction of structural response as compared to the case with no dampers added. Empirical formulae for estimating the dynamic properties of the viscoelastic damper are established based on the regression analysis using data obtained from component tests of the damper. The structural damping with added dampers can be satisfactorily estimated by the modal strain energy method and the derived empirical formulae. Numerical simulations using conventional modal analysis methods are also carried out to predict the dynamic response of viscoelastically damped structures under seismic excitations. Comparison between numerical simulations and test results shows very good agreement. Based on the above studies, a design procedure for viscoelastically damped structures is present . This design procedure fits naturally into the conventional structural design flow-chart by including damping ratio an additional design parameter.

키워드

참고문헌

  1. Proceedings of 4th US National Conference on Earthquake Engineering v.3 The Application of Viscoelastic Dampers to Seismically Resistant Structures Aiken,I.D.;Kelly,J.M.;Mahmoodi,P.
  2. Engineering Structure v.13 An Experimental Study of Seismic Structural Response with Added Viscoelastic Dampers Lin,R.C.;Liang,Z.;Soong,T.T.;Zhang,R.H.
  3. Technical Report NCEER 91-0012 Effent of Ambient Temperature on Seismic Response of a 2/5-Scale Steel Structure with Added Viscoelastic dampers Chang,K.C.;Soong,T.T.;Oh,S.T.;Lai,M.L.
  4. Thesis presented to the State University of New York at Buffalo, New York, in partial fulfillment of the requirements for the degree fo Doctor of Philosophy Seismic Behavior of a 2 / 5-Scale Steel Structure with Added Viscoelastic Damper Oh,S.T.
  5. Earthquake Engineering and Structural Dynamics v.18 Seismic Response of Steel Frame Structures with Added Viscoelastic Dampers Zhang,R.H.;Soong,T.T.;Mahmoodi,P.
  6. Proceedings of Damping '91 Correlation of Experimental Results with Predictions of Viscoelastic Damping of a Model Structure Soong,T.T.;Lai,M.L.
  7. AIAA Journal v.20 no.9 Finite Element Prediction of Damping in Structures with Constrained Viscoelastic Layers Johnson,C.D.;Kienholz,D.A.
  8. Report No. UCB/EERC 73-06 DRAIN-2D : A General Purpose Computer Program for Dynamic Analysis of Inelastic Plane Structures Kanaan,A.E.;Powell,G.H.