공간 강뼈대 구조물의 비선형 동적 해석
Nonlinear Dynamic Analysis of Space Steel Frames
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초록
본 논문에서는 동적하중 재하 시 공간 강뼈대 구조물의 비선형 시간이력 해석에 대한 간편하고 효율적인 수치해석 기법을 제시하였다. 뼈대의 강성행렬에 안정함수를 적용함으로서 기하학적 비선형성 즉 P-δ 및 P-Δ 효과를 고려하였다. 접선계수 개념 및 New Orbison 완전 소성면에 기초한 연화소성힌지를 적용하여 축방항력에 의한 부재의 점진적 항복 및 휨에 의한 부재의 부분 소성화를 고려하였다. 증분형태로 정식화된 뼈대 구조의 동적평형방정식의 해를 수치적으로 구하기 위하여 적분형태의 평균가속도법을 사용하여 컴퓨터 프로그램을 개발하였다. 검증 예제에 대하여 보요소 모델을 사용한 ABAQUS 및 개발된 프로그램에 의한 해석결과를 비교함으로서 개발된 프로그램의 정밀도와 해석시간에 대한 효율성을 입증하였다.
Abstract
This paper presents a reliable numerical procedure for nonlinear time-history analysis of space steel frames subjected to dynamic loads. Geometric nonlinearities of member (P-δ) and frame (P-Δ) are taken into account by the use of stability functions in framed stiffness matrix formulation. The gradual yielding along the member length and over the cross section is included by using a tangent modulus concept and a softening plastic hinge model based on the New-Orbison yield surface. A computer program utilizing the average acceleration method for the integration scheme is developed to numerically solve the equation of motion of framed structure formulated in an incremental form. The results of several numerical examples are compared with those derived from using beam element model of ABAQUS program to illustrate the accuracy and the computational efficiency of the proposed procedure.
참고문헌 (12)
- "Nonlinear elastoplastic analysis of spatial structures under dynamic loading using kinematic hardening models. Engineering Structures", pp.568~576 (1996)
- "Nonlinear elements for three dimensional frame analysis. Ph.D. thesis" (1994)
- "Large deflection dynamic analysis of space frames. Computer and Structures", pp.381~387 (1996)
- "Dynamics of structures Theory and applications to earthquake engineering. Prentice Hall" (2001)
- "Large- displacement analysis of elastoplastic thin-walled frames. I Formulation and implementation. Journal of Structural Engineering", pp.905~914 (1996)
- "Large- displacement analysis of elastoplastic thin-walled frames. II Verification and application. Journal of Structural Engineering", pp.915~925 (1996)
- "Spread-of-plasticity analysis of three-dimensional steel frames. Journal of Constructional Steel Research" (2002)
- "3-D second- order plastic-hinge analysis accounting for lateral torsional buckling. International Journal of Solids and Structures", pp.2109~2128 (2002)
- "3-D second- order plastic-hinge analysis accounting for local buckling. Engineering Structures", pp.81~90 (2003)
- "Direct design of three-dimensional frames using practical advanced analysis. Engineering Structures", pp.1491~1502 (2001)
- "Improved nonlinear plastic hinge analysis of space frame structures. Engineering Structures", pp.1324~1338 (2000)
- "Plastic-zone analysis of 3D steel frames using beam elements. Journal of Structural Engineering", pp.1328~1337 (1999)