ATENA

콘크리트 구조물의 비선형 유한요소 시뮬레이션 프로그램
ATENA는 체코 Cervenka Conculting사에서 개발된 콘크리트 및 철근콘크리트 구조물의
실제 비선형 거동및 균열발생 상황을 예측 및 분석할 수 있는 프로그램입니다.

ATENA의 특징

• 모델생성 및 Mesh Generator

  ATENA는 매우 직관적이고 간편한 사용자 인터페이스(Graphical Pre- and Post-Processor)를 사용하여 모델 생성 및 그래픽 결과를 출력할 수 있습니다. 또한, Mesh Generator를 이용하여 최적화된 Mesh를 생성시킬 수 있습니다.

  

• 하중 입력

  • Body forces, Loading forces, Supports, Prescribed deformations, Temperature, Shrinkage, Pre-stressing
  • 하중조합 및 반복하중
  • 극한하중(Pushover)

• 데이터 입력 및 수정

  정형화된 입력창을 통하여 물성치 및 각종 데이터값을 간편하게 입력 또는 수정할 수 있습니다.

• Crack 모델

  • Fixed Crack Model
  • Rotated Crack Model

• Intercace

  인터페이스 프로그램을 이용하여 매우 복잡하고 기하학적인 3차원 모델도 쉽고 간편하게 생성할 수 있습니다.

  • GID interface (GID - general finite element pre- and post-processor)
  • FEMAP Interface (FEMAP general finite element pre- and postprocessor)

  FEMAP can be used to prepare 3D models for ATENA and for post-processing of ATENA results.

  

ATENA의 기능

• Finite Element

  • 2차원 요소: 평면, 축대칭, High-order
  • 3차원 요소: Soild, Shell(layered), Beam(fiber), Low- and High-order
  • 바(Truss) 요소: Reinforcement bar, Smeared reinforcement
  • 스프링 요소: 선형, 비선형, Support
  • Interface 요소
  • External Cable 요소
  

• Material Model

  • 2D SBETA concrete model(high strength and SFRC): smeared cracks, crack-band, fracture-energy-based softening, Kupfer’s compressive failure, variable shear retention, strength reduction of cracked concrete
  • 3D fracture-plastic concrete model based on Menetrey-Willam law: smeared cracks, fracture-energy based softening, non-associated plasticity, user defined functions, variable parameters

  • Reinforcement bi-linear and multi-linear
  • Reinforcement with bond(CEB-FIP 1990)
  • Von Mises plasticity for metals
  • Drucker-Prager plasticity with associated / non-associated flow rule for rock and soil
  • Bazant M4 microplane concrete
  • Reinforcement cyclicInterface with Mohr-Coulomb material law

  • Isotropic elastic
  • Non-linear springs
  • Temperature dependent
  • Fire-exposed material
  • Creep and shrinkage (Bazant, Eurocode, ACI)
  • Transport of heat and moisture
  • Fatique of Concrete in Tension
  

• Solution Method

  • Direct and sparse solver of equations.
  • Newton-Raphson and modified Newton-Raphson.
  • Arc-length. Line-search.
  • Tangential and elastic stiffness predictors.
  • Eigenvalue Solution
  

• 해석기능

  • 정적 응력해석
  • 비선형 유한요소 해석
  • 시공 단계별 해석
  • Creep & Shrinkege 해석

  • 열전달 및 확산(침투) 해석
  • 열응력 해석
  • 변형 및 균열 해석
  • 접촉 및 박리 해석

  • Eigenvalue Analysis
  • Dynamic implicit analysis(Newmark’s scheme including the Hughes alpha method)
  

Graphic User Environment

• Pre-Processing

  • Geometrical modeling
  • Reinforcement (bars, smeared)
  • Copy and Move
  • Automatic meshing
  • Material properties
  • Loading and Supports
  • Solution methods
  • Monitoring
  

• Post-Processing

  • Iso-lines
  • Iso-areas
  • Rendering
  • Vectors

  • Tensors
  • Cracks
  • Response diagrams

  • Cuts/Sections
  • Internal forces (M,N,T)
  • User-defined numerical output
  

• AtenaWin

  General semi-graphical user interface for ATENA for solution and post-processing of 2D and 3D models. Requires input text files.

  

• ATENA V 4

  
  April 2009
  Product composition

  Egr.=Engineering
  Sci.=Science
  Full=Egr. + Sci + GID

  Item	Module	Product
  		2D Egr.	3D Egr.	Sci.	Full
  1	Finite elements
  1.1	2D basic elements	x	x	x	x
  1.2	Axisymmetrical elements	x	x	x	x
  1.3	3D basic elements		x	x	x
  1.4	2D higher order elements			x	x
  1.5	Higher order Axisym. elements			x	x
  1.6	3D higher order elements		x	x	x
  1.7	Shell high order element		x	x	x
  1.8	3D beam high order element			x	x
  1.9	2D interface element	x	x	x	x
  1.10	3D interface element		x	x	x
  1.11	2D external cable element	x	x	x	x
  1.12	3D external cable element		x	x	x
  1.13	Bond element for bars	x	x	x	x
  2	Material models
  2.1	2D basic materials	x	x	x	x
  2.2	3D basic materials	x	x	x	x
  2.3	3D variable material	x	x	x	x
  2.4	3D user material	x	x	x	x
  2.5	Bazant M4 microplane mat.	x	x	x	x
  2.6	Drucker-Prager material	x	x	x	x
  2.7	Reinforcement material	x	x	x	x
  2.8	Reinforcement cyclic material	x	x	x	x
  2.9	Interface material	x	x	x	x
  2.10	Bond for reinforcement	x	x	x	x
  2.11	Temperature dependent (fire)			x	x
  3	Solution methods
  3.1	Direct Gauss LU elimination	x	x	x	x
  3.2	Sparse iteractive solution		x	x	x
  3.3	Eigenvalue solution			x	x
  4	Analysis types
  4.1	Static		x	x	x
  4.2	Dynamic			x	x
  4.3	Creep and shrinkage			x	x
  4.4	Transport of heat and humidity			x	x
  4.5	Construction process		x	x	x
  5	Graphical user interface
  5.1	2D GUI	x	x		x
  5.2	3D GUI		x		x
  5.3	AtenaWin GUI	x	x	x	x
  5.4	T3D mesh generator	x	x	x	x
  5.5	GID Interface			x	x
  5.6	GID GUI				x
  5.7	FEMAP Interface		x	x	x