Karamba3D v2
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English 英文
  • Welcome to Karamba3D
  • New in Karamba3D 2.2.0
  • See Scripting Guide
  • See Manual 1.3.3
  • 1: Introduction
    • 1.1 Installation
    • 1.2 Licenses
      • 1.2.1 Cloud Licenses
      • 1.2.2 Network Licenses
      • 1.2.3 Temporary Licenses
      • 1.2.4 Standalone Licenses
  • 2: Getting Started
    • 2 Getting Started
      • 2.1: Karamba3D Entities
      • 2.2: Setting up a Structural Analysis
        • 2.2.1: Define the Model Elements
        • 2.2.2: View the Model
        • 2.2.3: Add Supports
        • 2.2.4: Define Loads
        • 2.2.5: Choose an Algorithm
        • 2.2.6: Provide Cross Sections
        • 2.2.7: Specify Materials
        • 2.2.8: Retrieve Results
      • 2.3: Physical Units
      • 2.4: Quick Component Reference
  • 3: In Depth Component Reference
    • 3.0 Settings
      • 3.0.1 Settings
      • 3.0.2 License
    • 3.1: Model
      • 3.1.1: Assemble Model
      • 3.1.2: Disassemble Model
      • 3.1.3: Modify Model
      • 3.1.4: Connected Parts
      • 3.1.5: Activate Element
      • 3.1.6: Line to Beam
      • 3.1.7: Connectivity to Beam
      • 3.1.8: Index to Beam
      • 3.1.9: Mesh to Shell
      • 3.1.10: Modify Element
      • 3.1.11: Point-Mass
      • 3.1.12: Disassemble Element
      • 3.1.13: Make Beam-Set đź”·
      • 3.1.14: Orientate Element
      • 3.1.15: Dispatch Elements
      • 3.1.16: Select Elements
      • 3.1.17: Support
    • 3.2: Load
      • 3.2.1: General Loads
      • 3.2.2: Beam Loads
      • 3.2.3: Disassemble Mesh Load
      • 3.2.4: Prescribed displacements
    • 3.3: Cross Section
      • 3.3.1: Beam Cross Sections
      • 3.3.2: Shell Cross Sections
      • 3.3.3: Spring Cross Sections
      • 3.3.4: Disassemble Cross Section đź”·
      • 3.3.5: Eccentricity on Beam and Cross Section đź”·
      • 3.3.6: Modify Cross Section đź”·
      • 3.3.7: Cross Section Range Selector
      • 3.3.8: Cross Section Selector
      • 3.3.9: Cross Section Matcher
      • 3.3.10: Generate Cross Section Table
      • 3.3.11: Read Cross Section Table from File
    • 3.4: Joint
      • 3.4.1: Beam-Joints đź”·
      • 3.4.2: Beam-Joint Agent đź”·
      • 3.4.3: Line-Joint
    • 3.5: Material
      • 3.5.1: Material Properties
      • 3.5.2: Material Selection
      • 3.5.3: Read Material Table from File
      • 3.5.4: Disassemble Material đź”·
    • 3.6: Algorithms
      • 3.6.1: Analyze
      • 3.6.2: AnalyzeThII đź”·
      • 3.6.3: Analyze Nonlinear WIP
      • 3.6.4: Large Deformation Analysis
      • 3.6.5: Buckling Modes đź”·
      • 3.6.6: Eigen Modes
      • 3.6.7: Natural Vibrations
      • 3.6.8: Optimize Cross Section đź”·
      • 3.6.9: BESO for Beams
      • 3.6.10: BESO for Shells
      • 3.6.11: Optimize Reinforcement đź”·
      • 3.6.12: Tension/Compression Eliminator đź”·
    • 3.7: Results
      • 3.7.1: ModelView
      • 3.7.2: Deformation-Energy
      • 3.7.3: Element Query
      • 3.7.4: Nodal Displacements
      • 3.7.5: Principal Strains Approximation
      • 3.7.6: Reaction Forces đź”·
      • 3.7.7: Utilization of Elements đź”·
        • Examples
      • 3.7.8: BeamView
      • 3.7.9: Beam Displacements đź”·
      • 3.7.10: Beam Forces
      • 3.7.11: Node Forces
      • 3.7.12: ShellView
      • 3.7.13: Line Results on Shells
      • 3.7.14: Result Vectors on Shells
      • 3.7.15: Shell Forces
      • 3.7.16 Results at Shell Sections
    • 3.8: Export đź”·
      • 3.8.1: Export Model to DStV đź”·
      • 3.8.2 Json / Bson Export and Import
    • 3.9 Utilities
      • 3.9.1: Mesh Breps
      • 3.9.2: Closest Points
      • 3.9.3: Closest Points Multi-dimensional
      • 3.9.4: Cull Curves
      • 3.9.5: Detect Collisions
      • 3.9.6: Get Cells from Lines
      • 3.9.7: Line-Line Intersection
      • 3.9.8: Principal States Transformation đź”·
      • 3.9.9: Remove Duplicate Lines
      • 3.9.10: Remove Duplicate Points
      • 3.9.11: Simplify Model
      • 3.9.12: Element Felting đź”·
      • 3.9.13: Mapper đź”·
      • 3.9.14: Interpolate Shape đź”·
      • 3.9.15: Connecting Beams with Stitches đź”·
      • 3.9.16: User Iso-Lines and Stream-Lines
      • 3.9.17: Cross Section Properties
    • 3.10 Parametric UI
      • 3.10.1: View-Components
      • 3.10.2: Rendered View
  • Troubleshooting
    • 4.1: Miscellaneous Questions and Problems
      • 4.1.0: FAQ
      • 4.1.1: Installation Issues
      • 4.1.2: Purchases
      • 4.1.3: Licensing
      • 4.1.4: Runtime Errors
      • 4.1.5: Definitions and Components
      • 4.1.6: Default Program Settings
    • 4.2: Support
  • Appendix
    • A.1: Release Notes
      • Work in Progress Versions
      • Version 2.2.0 WIP
      • Version 1.3.3
      • Version 1.3.2 build 190919
      • Version 1.3.2 build 190731
      • Version 1.3.2 build 190709
      • Version 1.3.2
    • A.2: Background information
      • A.2.1: Basic Properties of Materials
      • A.2.2: Additional Information on Loads
      • A.2.3: Tips for Designing Statically Feasible Structures
      • A.2.4: Hints on Reducing Computation Time
      • A.2.5: Natural Vibrations, Eigen Modes and Buckling
      • A.2.6: Approach Used for Cross Section Optimization
    • A.3: Workflow Examples
    • A.4: Bibliography
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  1. 3: In Depth Component Reference
  2. 3.3: Cross Section

3.3.6: Modify Cross Section đź”·

Previous3.3.5: Eccentricity on Beam and Cross Section đź”·Next3.3.7: Cross Section Range Selector

Last updated 3 years ago

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In Karamba3D cross section properties fall into four categories:

“General”

parameter which set the name, family, color, material and element identifier

“Geometry”

properties that determine the cross section size and eccentricity

“Deformation”

these parameters influence the elastic behavior of a structure

“Resistance”

properties which are used by cross section design procedures in order to determine the load-bearing capabilities

The meaning of the input-values in the menu sections "Deformation" and "Resistance" are given in the help-texts associated to each input-plug.

The “Modify Cross Section”-component allows to change these properties. Two operation modes exist for this component:

Flow through: When a Cross section is provided as input, the result on the left side is the same cross section by default. Only those properties get changed, for which values are supplied as input.

Agent: The cross sections which shall be modified can be selected via the “Elem-Ids”-input. It is possible to apply regular expressions. The resulting cross section agent is of type “Cross Section” and gets active when being plugged into an “Assemble”-component.

In case the height or thickness of a cross section is changed along with deformation- or resistance parameters, the evaluation proceeds from top to bottom: First, all parameters get updated according to the new cross section dimensions, these may then be overwritten by new values for deformation of resistance properties. The drop-down list at the bottom of the component allows to switch between beam- and shell-cross sections.

Fig. 3.3.6.1: the definition of a simply supported beam under uniform load. A “Modify CroSec”-component can be used to impose shear rigidity in local z-direction on a cross section. Now the calculated maximum displacement coincides with the result of the formula without shear effects. Textbook formulas for calculating the maximum displacement of such a system usually neglect the influence of shear-deformations. In order to make a cross section nearly rigid in shear the “Modify Cross Section”-component is used to set the shear area AzA_zAz​ to a very large value.

45KB
Cross_Section_Modify.gh
Fig. 3.3.6.1: ModifyCroSec Component