Powerful Nonlinear Seismic Analysis for Professional Structural Engineers and Researchers

In the demanding fields of structural engineering and seismic research, understanding how structures perform under extreme dynamic loads is paramount. Ruaumoko3D is a sophisticated software solution meticulously developed to empower engineers and researchers with the tools for in-depth inelastic dynamic analysis, enabling you to gain profound insights into structural behavior and make informed, confident decisions.

Comprehensive Analysis:

Ruaumoko3D provides a versatile suite of analytical capabilities designed to meet diverse project requirements.

• Conduct Static Analysis with iterative inelastic behavior, allowing you to accurately assess a structure’s response under sustained loads.
• Perform detailed Dynamic Time-history analyses using advanced Newmark constant average acceleration or Central Difference explicit methods, giving you the power to precisely simulate a structure’s reaction to complex earthquake ground motions or other dynamic excitations over time.
• Utilize Adaptive Push-Over and Cyclic Adaptive Push-Over analyses to determine a structure’s ultimate capacity and its performance under repeated loading cycles, crucial for seismic vulnerability assessments.
• Simulate realistic scenarios with Multiple Input Ground Displacement Histories, capturing nuanced real-world conditions.
• Leverage Response Spectrum Analysis for efficient design and code compliance checks.

Advanced Modeling for Realistic Outcomes:

Gain unparalleled accuracy by incorporating critical real-world factors into your models.

• Choose between Lumped, Diagonal, or Consistent mass matrices to best represent your structure’s inertial properties, contributing to more accurate dynamic responses.
• Apply a wide range of damping models, including various Rayleigh damping formulations (initial stiffness, tangent stiffness, material specific) and Wilson-Penzien damping models (linear, tri-linear, user-specified modal damping), ensuring the energy dissipation in your model closely mirrors physical reality.
• Account for significant geometric non-linearities, including large displacement effects and P-Delta effects, providing a more true-to-life representation of structural behavior under deformation.
• Model structures with high fidelity using an extensive library of element types, such as Beam/Beam-Column, Spring, Damper, Tendon, Contact, Quadrilateral, Panel, Ground, Multi-Spring, Compound, External, Lattice, Reinforced Concrete Hinge, Inertia, Slotted Concrete Hinge, and Wall elements. This flexibility allows you to accurately capture the nuances of various structural components and material responses, including strength and stiffness degradation, bi-linear factors, plastic hinge lengths, and axial force-moment interaction.

Streamlined Workflow and Actionable Insights:

Ruaumoko3D is designed to support your workflow from input to interpretation.

• Work efficiently in interactive or batch mode, and seamlessly import input data from text files for flexible project setup.
• Benefit from clear output and visualization options, including on-screen graphics that depict deformed shapes, highlight areas of inelastic behavior, and illustrate mode shapes.
• Generate essential plots of accelerograms and excitation histories, and export results to a DYNAPLOT post-processor file for further analysis.
• Automatically calculate and output inter-storey drifts and residual inter-storey drifts, providing key performance indicators vital for assessing structural damage and safety.

Developed by Athol J. Carr at the University of Canterbury, Ruaumoko3D stands as a testament to rigorous academic research translated into a practical and powerful tool, ready to support your most challenging seismic analysis work.