StiffPredict

Overview

Rotational stiffness prediction of rack beam-to-upright connections using machine learning.

StiffPredict is an advanced machine learning-based tool for predicting the rotational stiffness (k₀) of semi-rigid beam-to-upright connections in storage rack systems. Developed from a validated dataset obtained through experimental investigations and numerical simulations, StiffPredict provides reliable estimations of joint stiffness based on connector geometry, material properties, and structural configuration.

The underlying model reflects state-of-the-art research on semi-rigid connections, ensuring transparency, credibility, and engineering-grade accuracy for structural engineers and researchers engaged in the design and analysis of cold-formed steel storage racks.

Academic Publication:
An academic paper detailing the methodology and validation of StiffPredict is currently under preparation and will be published in a peer-reviewed scientific journal.

Core Features

Rotational stiffness (k₀) prediction for semi-rigid beam-to-upright joints
Integration of connector geometry, upright properties, and material characteristics
Automated multi-model machine learning framework with accuracy optimization
Real-time estimation without the need for full-scale testing
Model explainability through feature importance analysis
Exportable performance reports and graphical visualization tools

Inputs

Parameter	Description
Connector type & geometry	Tab/lip/hook configuration, thickness, and length
Upright section properties	Cross-sectional dimensions, wall thickness, moment of inertia
Material properties	Yield strength, modulus of elasticity
Beam depth & loading	Beam geometry and applied shear/axial conditions
Tolerances & looseness	Assembly gaps and mounting tolerances

Outputs

Predicted rotational stiffness (k₀, kNm/rad)
Accuracy indicators (R², RMSE, MAE)
Normalized feature contributions
Exportable technical report (PDF/CSV)
Visual moment–rotation charts

Target Users

Rack system designers and practicing engineers
Structural consultants and design offices
Researchers in cold-formed steel and semi-rigid connection mechanics
Warehouse safety and infrastructure specialists

Disclaimer

This software predicts the rotational stiffness of beam-to-upright connections under idealized loading conditions. To ensure conservative design, users are advised to apply a 20% reduction to the predicted k₀ values.

All design decisions, safety factors, and regulatory verifications must be independently performed by the practicing engineer. The developers assume no liability for misuse or misinterpretation of results.

The underlying methodology is currently being documented in an academic paper that will soon be submitted for peer review.