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- 주제어 : Applied element method (검색결과 16 건)
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Applied element method simulation of experimental failure modes in RC shear walls
Corneliu Cismasiu,António Pinho Ramos,Ionut D. Moldovan,Diogo F. Ferreira,Jorge B. Filho 사단법인 한국계산역학회 2017 Computers and Concrete, An International Journal Vol.19 No.4
With the continuous evolution of the numerical methods and the availability of advanced constitutive models, it became a common practice to use complex physical and geometrical nonlinear numerical analyses to estimate the structural behavior of reinforced concrete elements. Such simulations may yield the complete time history of the structural behavior, from the first moment the load is applied until the total collapse of the structure. However, the evolution of the cracking pattern in geometrical discontinuous zones of reinforced concrete elements and the associated failure modes are relatively complex phenomena and their numerical simulation is considerably challenging. The objective of the present paper is to assess the applicability of the Applied Element Method in simulating the development of distinct failure modes in reinforced concrete walls subjected to monotonic loading obtained in experimental tests. A pushover test was simulated numerically on three distinct RC shear walls, all presenting an opening that guarantee a geometrical discontinuity zone and, consequently, a relatively complex cracking pattern. The presence of different reinforcement solutions in each wall enables the assessment of the reliability of the computational model for distinct failure modes. Comparison with available experimental tests allows concluding on the advantages and the limitations of the Applied Element Method when used to estimate the behavior of reinforced concrete elements subjected to monotonic loading.
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Jason Ah Chin,Mauricio Garcia,Jeffrey Cote,Ellen Mulcahy,Jonathan Clarke,Ahmed Elshaer 한국풍공학회 2022 Wind and Structures, An International Journal (WAS Vol.34 No.3
The resiliency of electricity transmission and distribution lines towards natural and man-made hazards is critical to the operation of cities and businesses. The extension of these lines throughout the country increases their risk of extreme loading conditions. This paper investigates a unique extreme loading condition of a 100-year old distribution line segment that passes across a river and got entangled with a boom of a ship. The study adopts the Applied Elements Method (AEM) for simulating 54 cases of the highly deformable structural behaviour of the tower. The most significant effects on the tower’s structural integrity were found to occur when applying the load with components in all three of the cartesian directions (i.e., X, Y and Z) with the full capacities of the four cables. The studied extreme loading condition was determined to be within the tower’s structural capacity, attributed to the shear failure of the anchor bolts, which acted as a sacrificing element that fails to protect the transfer of tensioning load to the supporting tower.
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AEM을 이용한 철근콘크리트 모형 구조물의 붕괴 모델링
박훈(Hoon Park),석철기(Chul-Gi Suk),김승곤(Seung-Kon Kim) 한국암반공학회 2009 터널과지하공간 Vol.19 No.1
구조물의 비선형적인 대변위 붕괴거동을 해석하기 위해 다양한 수치 해석에 대한 연구가 진행되어 왔다. 본 연구에서는 새로운 수치해석 기법인 Applied Element Method (AEM)를 이용하여 철근 콘크리트 모형 구조물의 발파해체 붕괴거동을 모사하였다. 모형 구조물의 발파해체 붕괴거동과 수치해석으로 모사된 구조물의 붕괴거동을 X 방향(수평방향)의 변위와 Z 방향(수직방향)의 변위에 대해 비교한 결과, 수치해석에서 모사된 구조물의 붕괴거동은 실제 모형 구조물의 붕괴거동을 사실적으로 모사할 수 있음을 확인하였다. In order to analyze collapse behavior of structure containing irregular and large displacement, many numerical analyses have been conducted. In this study, using a new method, Applied Element Method (AEM) for collapse analysis of structures, collapse behavior of model RC structures is simulated. From these simulations results, displacement of X-direction (or horizontal) and displacement of Y-direction (or vertical) is similar to that of model RC structures. It is confirmed that collapse behavior of structures using AEM is reliable accurately simulated with that of model RC structures.
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Use of Applied Element Method for Structural Analysis
Aliakbar Shakeri,Khosrow Bargi 대한토목학회 2015 KSCE JOURNAL OF CIVIL ENGINEERING Vol.19 No.5
Applied Element Method (AEM) is a numerical analysis used in prediction the behavior of structures. The modeling of objects in AEM has the ability to simulate structural behavior through all stages of loading as well as evaluating seismic behavior of structures. This paper presents the advantages of AEM in comparison with FEM (Finite Element Method). It describes the theory, formulation and algorithm of the method for static and dynamic analysis of structures. The application of AEM is illustrated through the organization of two FORTRAN source codes: AEMST and AEMDN through static and dynamic analysis of frames. The validation results of the programs are also evaluated by some examples. Results show static analysis using AEMST has high accuracy of the program despite simplicity of AEM in theory and formulation. In addition, several selection criteria in order to select the appropriate size of elements and number of connecting springs are proposed for different situations. Besides, dynamic analysis was performed in AEMDN using Newmark-β method directly and WYD (Wilson, Yuan, and Dickens) Ritz vectors. Results show high accuracy of AEM and AEMDN for dynamic analysis. It also illustrated the lowest processing time needed for WYD Ritz vectors as well as its accuracy.
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CAE 기법을 활용한 3㎿급 풍력발전기 로터의 구조 및 진동해석
김요한(Yo-Han Kim),박효근(Hyo-Geun Park),김동현(Dong-Hyun Kim),김동만(Dong-Man Kim),황병선(Byoung-Sun Hwang),박지상(Ji-Sang Park),정성훈(Sung-Hoon Jung) 한국유체기계학회 2008 한국유체기계학회 논문집 Vol.11 No.4
In this study, computer applied engineering (CAE) techniques are fully used to conduct structural and dynamic analyses of a huge composite rotor blade. Computational fluid dynamics is used to predict aerodynamic load of the rotating wind-turbine blade model. Static and dynamic structural analyses are conducted based on finite element method for composite laminates and multi-body dynamic simulation tools. Various numerical results for aerodynamic load, static stress, buckling and dynamic analyses are presented and characteristics of structural behaviors are investigated herein.
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회전 및 풍하중 가진 효과를 고려한 대형 풍력발전 로터의 효율적인 슈퍼요소 구조진동해석
김동만(Kim, Dong-Man),김동현(Kim, Dong-Hyun),박강균(Park, Kang-Kyun),김유성(Kim, Yu-Sung) 한국소음진동공학회 2009 한국소음진동공학회 논문집 Vol.19 No.7
In this study, computer applied engineering(CAE) techniques are fully used to efficiently conduct structural and dynamic analyses of a huge composite rotor blade using super-element. Computational fluid dynamics(CFD) is used to predict aerodynamic loads of the rotating wind-turbine blade. Structural vibration analysis is conducted based on the non-linear finite element method for composite laminates and multi-body dynamic simulation tools. Various numerical results are presented for comparison and the structural dynamic behaviors of the rotor blade are investigated herein.
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하중 재분배에 의한 RC 구조물의 연쇄붕괴 저항성능 평가
박훈,석철기 한국방재학회 2013 한국방재학회논문집 Vol.13 No.6
Progressive collapse indicates the partial or total collapse of structures caused by the local damage of structural members arisingfrom an abnormal load. To induce ideal collapse behavior, the progressive collapse is applied to most explosive demolitiondesign for structures. To apply this progressive collapse phenomenon to the explosive demolition of structures, studies on progressivecollapse resisting capacity depending on load redistribution are required. In this study, the progressive collapse analysis ofa 10-story RC frame structure was performed by the applied element method for various 1st column removal cases. For each case,the progressive collapse resisting capacity of columns, girder, and slabs was evaluated by the increase rates of the vertical internalforce in columns, the normal stress of reinforcing bars in girder, and the tensile stress of slab, respectively. 비정상하중에 의해 발생하는 구조부재의 국부손상이 구조물의 국부파괴 또는 전체파괴로 이어지는 연쇄붕괴는 이상적인 붕괴거동을 유도하기 위해 대부분의 구조물 발파해체 설계에 적용된다. 이러한 연쇄붕괴 현상을 구조물 발파해체에 적용하기 위해서는 하중의 재분배에 따른 연쇄붕괴 저항성능에 대한 연구가 요구된다. 본 연구에서는 응용요소법을 이용하여 10층 철근콘크리트 구조물의 연쇄붕괴 해석을 수행하였다. 구조부재인 기둥 요소의 제거 수와 제거 위치를 달라하여 하중의 재분배에 따른 기둥, 보, 슬래브에 대한 연쇄붕괴 저항성능을 평가하였다. 기둥의 수직내력 증가율은 하중의 재분배 경로수와 재분배 면적비에영향을 받으며, 거더 하부근과 슬래브의 인장응력이 현수작용을 증대시키고, 연쇄붕괴에 저항하고 있음을 알 수 있다.
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CAE 기법을 활용한 3㎿급 풍력발전기 로터의 구조 및 진동해석
박효근(Hyo-Geun Park),김요한(Yo-Han Kim),김동현(Dong-Hyun Kim),김동만(Dong-Man Kim),황병선(Byoung-Sung Hwang),박지상(Ji-Sang Park),정성훈(Sung-Hoon Jung) 한국유체기계학회 2007 유체기계 연구개발 발표회 논문집 Vol.- No.-
In this study, computer applied engineering (CAE) techniques are fully used to conduct structural and dynamic analyses of a huge composite rotor blade. Computational fluid dynamics is used to predict aerodynamic load of the rotating wind-turbine blade model. Static and dynamic structural analyses are conducted based on finite element method for composite laminates and multi-body dynamic simulation tools. Various numerical results for aerodynamic load, static stress, buckling and dynamic analyses are presented and characteristics of structural behaviors are investigated herein.
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