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Alpaca4d
ADDON. Version 0.7.1. Released on 19-Nov-2023. Provides 66 components. Created by Marco Pellegrino. Features 0 video tutorials.
Alpaca4d is a Grasshopper plugin which has been developed on top of OpenSees. It lets you analyse beam, shell and brick elements through Static, Modal and Ground Motion Analysis. Alpaca4d facilitates the interaction with OpenSees making it possible to model complex geometries within your parametric workflow and reducing the time spent in the modelling. The main idea is to provide an efficient and easy way to use OpenSees without writing any line of code.
07_Analysis
| Analysis Step (AnalysisStep) | |
| Damping This command is used to assign damping to all previously-defined elements and nodes | |
| Integrator Central Difference (CD) | |
| Integrator Load Control (LC) | |
| Integrator Newmark (NM) | |
| Natural Vibration Analysis (NV) | |
| Run Analysis (RA) | |
| Analysis Settings (AnalysisSettings) | |
| Test |
MomentCurvature
| Fiber Stress Strain (FBS) Read the stress strain in a fiber | |
| Fiber Section (FiberSection) Construct a FiberSection | |
| Layer Fiber Construct a LayerFiber | |
| Patch Construct a Patch | |
| Fiber Point Construct a FiberPoint | |
| Concrete01 (Concrete) Construct a concrete material with Zero Tensile Strength (Conrete01) | |
| ReinforcingSteel Construct an ReinforcingSteel | |
| Steel01 Construct a Steel01 | |
| MomentCurvature (MC) |
08_NumericalOutput
| Beam Forces (BF) Read the Beam Forces | |
| Brick Stresses (BS) Read the Brick Stresses | |
| Modal Analysis Report (MAR) Read the Modal Analysis Report | |
| Nodal Displacements (ND) Read Nodal Displacements | |
| Reaction Forces (RF) Read Reaction Forces | |
| Shell Forces (SF) Read the Shell Forces | |
| Shell Stresses (SS) Read the Shell Stresses |
10_Utility
| Custom code (CC) Add a custom OpenSees code | |
| Deconstruct Deconstruct any object | |
| Deserialise (DSLRZ) Geometry representation of an OpenSeesFile. Not all the elements have been implemented! | |
| Colors (CLR) Preset of gradient colors perfect for Data Visualisation | |
| MeshLoft (ML) Mesh Loft | |
| MeshSeriesToBrick (MSTB) MeshSeriesToBrick | |
| Serialize (SLRZ) Serialize a model and write the content to a file |
01_Section
| CircleCS Construct an Circle Cross Section | |
| Generic Section Construct an Generic Section | |
| I Section Construct an I Cross Section | |
| Plate Fiber Section (PFS) Construct an Plate Fiber Section | |
| RectangleCS Construct an Rectangle Cross Section | |
| RectangleHollow (RectangleHollowCS) Construct an Rectangle Hollow Section Cross Section |
02_Element
| ASD ShellQ4 (ASDQ4/DKGT) Construct a ASDShellQ4 element or DKGT Shell | |
| Force Beam Column Construct a ForceBeamColumn | |
| FourNodeTetrahedron (FNT) Construct a FourNodeTetrahedron element | |
| SSP Brick (SSP) Construct a SSP (Stabilized Single Point) Brick element | |
| Support Construct a Support |
04_Time Series
| Constant Time Series Construct a Constant Time Series | |
| Linear Time Series Construct a Linear Time Series | |
| Path Time Series (PTS) Construct a Path Time Series | |
| Read Time Series (RTS) Read a Path Time Series | |
| Trigonometric Time Series (TTS) Construct a Trigonometric Time Series |
05_Load
| Linear Load (LinearLoad) Construct a LinearLoad | |
| Gravity Load Construct a Gravity Load | |
| Mass Point (MP) Construct a PointLoad | |
| Mesh Load (MeshLoad) Construct a MeshLoad | |
| Point Load Construct a PointLoad |
Info
| Benchmark Get website with Alpaca4d/OpenSees Benchmark | |
| Donation Donation | |
| Sponsor Sponsor | |
| License License |
09_Visualisation
| Deformed Model View Deformed Model View | |
| Model View (ModelView) ModelView | |
| Beam Forces View (Beam Forces View (Alpaca4d)) | |
| Shell Forces View (Shell Forces View (Alpaca4d)) |
00_Material
| Elastic Isotropic Material (EIM) Construct an ElasticIsotropicMaterial | |
| Elastic Orthotropic Material (EOM) Construct an ElasticOrthotropicMaterial | |
| Uniaxial Material Elastic Construct an UniaxialMaterialElastic |
03_Constraint
| Rigid Diaphragm Construct a Rigid Diaphgram |
06_Assemble
| AssembleModel (Assemble Model) Assemble a Model |
Site design © Robin Rodricks.
Alpaca4d and associated data © 2025 Marco Pellegrino.
Rhinoceros and Grasshopper are registered trademarks of Robert McNeel & Associates.
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