• Journal of the Earthquake Engineering Society of Korea
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• v.2 no.4
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• pp.169-178
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• 1998

In general, the response spectrum analysis method is widely used for seismic analysis of building structures, and the time history analysis is applied for computation of structural vibration caused by equipments, machines and moving loads, etc. However, compared with the response spectrum analysis method, the time history method is very complex, difficult and time consuming. In this study, the maximum responses for the vertical vibration are calculated conveniently by the response spectrum method. At first, Response spectrum and time history analysis for some earthquake excitations are carried out, and the accuracy of maximum displacements obtained from response spectrum analysis is investigated. Secondly, the process for the response spectrum analysis in excitation is calculated, and the maximum modal responses are combined by CQC method. Finally, results of the proposed method are compared with those of the time history analysis.

• 건축구조
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• v.13 no.1
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• pp.46-58
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• 2006

구조동력학 이론에 기초하여 내진설계 기술이 개발되었다. 그러므로 건축물의 내진설계를 근본적으로 이해하기 위해서는 구조동력학의 여러 가지 이론들을 먼저 알고 이들이 내진설계에 어떻게 적용이 되는지를 알아야 한다. 이 글은 구조기술자 여러분이 건축물의 내진설계를 이해하는데 도움이 될 수 있도록 하기 위하여 다음과 같이 3부로연재될예정이다. 제1부: 응답스펙트럼과구조물의동적해석 제2부: 등가정적해석법과반응수정계수의배경 제3부: 능력스펙트럼법에의한비탄성해석 제1부에서는 단자유도 구조물의 지진해석을 통하여 응답스펙트럼을 작성하는 원리와 이를 이용하여 간편하게 지진해석을 수행하는 방법을 소개하고 응답스펙트럼에 근거하여 설계응답스펙트럼을 작성하는 방법과 다자유도 구조물의 지진응답을 알아내기 위한 응답 스펙트럼 해석법에 관하여 소개한다. 제2부에서는 구조동력학 이론에 근거하여 등가정적해석법이 유도된 근거와 반응수정계수를 사용하게 되는 배경을 소개하여 구조기술자들이내진설계에좀더확실한이해를할수있도록할것이다. 마지막으로 제3부에서는 비탄성해석을 좀 더 쉽게 하기 위하여 사용되는 능력스펙트럼법의 배경과 이를 이용하여 건축물의 성능점을 찾는 방법과 구조물의 비탄성 지진응답을 평가하는 방법에 대하여 소개함으로써 성능에 기초한 내진설계를 위한 기초 이론을 확실히 이해할수있도록할것이다. 구조동력학에 관한 내용을 여기에 상세히 소개하자면 엄청난 분량이 될 것이므로 여기서는 이 글을 읽는 구조기술자들이 구조동력학에 관한 기초적인 내용을 이해하고 있는 것으로 가정하기로 한다. 그러므로 구조동력학에 대한 기초적 이론을 확실히 이해하고 있지 못한분들은이글을읽기전에먼저구조동력학에관한알기쉬운서적을 먼저 읽도록 추천한다.

• Journal of the Earthquake Engineering Society of Korea
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• v.1 no.4
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• pp.1-9
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• 1997

This paper examined various aspects of a linear and a nonlinear response spectrum method in seismic response analysis of multi-story building structures. The response spectrum method that has been widely used in the analysis of linear structures was proposed different mode superposition method by several ivestigators, and the differences between combinations with an elastic modal analysis reviwed closely. It seems, however, that this method is not used to nonlinear seismic analysis. It is the purpose of this paper to propose an alternative method by means of which a nonlinear MDOF structure with long period may be analysed by an extention of response spectrum method. For nonlinear seismic analysis of high-rise building structures using technique proposed in this study, it is intended to serve primarily as a tool in preliminary designs instead of time history analysis.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 1993.04a
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• pp.173-180
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• 1993

주구조물의 여러층에 지지점을 가지는 부구조물의 응답스펙트럼 해석방법에 대하여 연구하였다. 본 연구에서는 지지점 입력간의 상관관계를 고려할 수 있으며 실무에서 부구조물의 내진설계에 쉽게 적용할 수 있는 다중 응답스펙트럼 해석방법을 제시하였다. 다중 응답스펙트럼과 지지점 입력간의 상관계수는 random vibration 이론을 이용하여 설계지반응웅답스펙트럼으로부터 직접 유도하였다. 예제해석 결과 본 연구에서 제안한 방법은 지지점 입력간의 상관관계를 고려하지 않는 통상의 다중 응답스펙트럼 해석방법보다 정확한 지진응답을 예측함을 알 수 있었다.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.14 no.1
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• pp.1-9
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• 2001

유체-구조물 상호작용 효과를 고려하여, 실린더형 수중 구조물의 유한요소 모델을 상용 전산코드를 사용하여 작성하고 동적하중에 대한 응답해석을 수행하였다. 구조 유한요소에 부착되는 유체 유한요소로 인하여 발생하는 요소행렬의 비대칭성으로 인하여, 일반적으로 사용되는 유한요소 해석 전산코드로 유체-구조물 상호작용 모델에 대한 응답스펙트럼해석을 수행하는 것은 불가능하다. 이 문제의 해결을 위하여, 등가 비 유체-구조물 상호작용 모델을 구성하고, 등가비 유체-구조물 상호작용 모델에 대한 응답스펙트럼 해석 및 조화가진 응답해석 결과를 이용하여 유체-구조물 상호작용 모델의 스펙트럼 가진에 대한 동적 응답을 계산할 수 있는 효율적인 방법을 제시하였다.

• Computational Structural Engineering
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• v.6 no.4
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• pp.67-72
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• 1993

This paper deals with the response spectra analysis method of the secondary structures including the correlation effect between the nonuniform multiple support excitations. Based on the random vibration theory, the multiple floor response spectra and the cross-correlation coefficient spectra of the floor motions are derived from the design ground response spectra. The example analysis results show that the proposed method yields more accurate results than those by the conventional multiple floor response spectra method without the correlation effects of the support motions. The present method may be easily employed in the seismic design of the secondary structures in engineering practice.

• Journal of the Korean Geotechnical Society
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• v.19 no.4
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• pp.211-221
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• 2003

The response displacement method is the most frequently used method for seismic design of underground structures. This method is pseudo-static method, and the evaluations of velocity response spectrum of seismic base and response displacement of surrounding soil are the most important steps. In this study, the evaluation of velocity response spectrum of seismic base according to the Korean seismic design guide and the simple method of calculating the response displacement were studied. It was found that velocity response spectrum of seismic base can be estimated by directly integrating the ground-surface acceleration response spectrum of soil type S$_A$, and the evaluation of the response displacement using double cosine method assuming two layers of soil profile shows the advantages in the seismic design.

• Journal of Korean Association for Spatial Structures
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• v.8 no.1
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• pp.57-67
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• 2008

In general, the response spectrum analysis(RSA) method is wifely used for seismic analysis of building structures, and the time history analysis(THA) is applied for computation of structural vibration caused by equipments, machines and moving loads, etc. However, compared with the RSA method, the THA method is very complex, difficult and time consuming. In this study, the maximum responses for the vertical vibration are calculated conveniently by the RSA method. At first, the process for the RSA in excitation is proposed, and the maximum modal responses are combined by CQC and SRSS methods. Also, the responses obtained by the two modal combination methods are compared to the responses by the THA. And the correlation coefficients for human activities is proposed, and the RSA responses obtained by used to the correlation coefficients are calculated. Finally, results of the proposed method are compared with those of the time history analysis and correlation coefficients should be considered for the RSA of floor structure subjected to group dynamic loads.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.32 no.1
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• pp.7-16
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• 2019

In this paper, for a seismic analysis of an offshore subsea manifold, Response Spectrum Analysis(RSA) and Time History Analysis(THA) were conducted under a various analysis conditions. Response spectrum and seismic design procedure have followed ISO19901-2 code. In case of THA, The response spectrum were converted into artificial earthquake history and both of Explicit and Implicit solvers were used to examine the characteristics of seismic analysis. For the verification, Various seismic analysis methods were applied on a single degree of freedom beam model and a simplified model of the actual manifold. The difference between the results of RSA and THA on the simplified manyfold model evaluated for the analysis of the actual manifold. Because THA is impossible in case of real complex structure such as a manifold, Safety of the actual manifold structure was accessed by using the RSA and the difference between the results of RSA and THA from the simplified model.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.15 no.1
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• pp.21-32
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• 2002

In general, the response spectrum analysis method (R.S.A) is widely used for seismic analysis of building structure. But, it is not common to apply R.S.A for the analysis of structural vibration caused by dynamic loads of equipments, machines and moving leads, etc. The time history analysis method(T.H.A) for the vibration analysis, compared with R.S.A, is very complex, difficult and time consuming. So the application of R.S.A, that is convenient to calculate maximum responses for structural vibration, is proposed in this study. At first, the procedure for the application of the R.S.A to calculate of the maximum vibration response induced by dynamic load applied on the single point is described. And then, the process, which can save the time and the memory for calculation of the maximum vibration response induced by dynamic loads on the multi-point is proposed, and the maximum structural response caused by moving loads are obtained. Lastly, the accuracy of the proposed method is verified by comparing the results of R.S.A to T.H.A for some example models.