Product Overview
In this project, the seismic performance of a web-opening weakened (WOW) steel beam-to-column moment connection is investigated using the Abaqus software.
The numerical model is developed based on the SC-3 experimental specimen reported in the reference research paper. The connection consists of a steel beam and column with a circular opening introduced in the beam web near the beam-to-column connection. The web opening is designed to weaken the beam section and promote the formation of a plastic hinge away from the column face.
The geometry, material properties, interactions, boundary conditions, and analysis settings are defined in Abaqus to reproduce the behavior of the experimental connection.
Model Description
The model represents a beam-to-column connection with an opening based on the configuration of the experimental specimen reported in the reference study.
The beam and column are connected by welded joints and a circular opening with a radius of 80 mm is introduced in the beam web near the beam-to-column connection to create the weakened section.
The numerical model is subjected to cyclic loading at the end of the beam, allowing the nonlinear seismic response of the connection to be investigated.
Cyclic Loading
The analysis is performed in two main steps.
In the first step, a constant 400 kN axial load is applied to the column. This load is then maintained throughout the subsequent analysis.
In the second step, while the 400 kN axial load is maintained on the column, cyclic loading is applied to the end of the beam to investigate the seismic response of the beam-to-column connection.
The cyclic loading history is defined in Abaqus using the Amplitude option according to the loading protocol of the experimental study.
Buckling and Deformation
As the cyclic loading increases, local buckling develops in the beam around the web-opening section.
For the SC-3 connection, local buckling develops in both the beam flanges and beam web at the web-opening section. The concentration of plastic deformation in this weakened region leads to the formation and development of a plastic hinge away from the column face.
The development of local buckling and plastic deformation at the web-opening section affects the stiffness and load-carrying response of the connection during the cyclic loading process.
Results and Hysteresis Response
The Abaqus results are extracted and processed to evaluate the response of the beam-to-column connection under cyclic loading.
The force–displacement hysteresis diagram obtained from the Abaqus analysis is compared with the experimental results reported in the reference research paper.
As plastic deformation develops around the web-opening section, the connection exhibits a gradual reduction in strength and stiffness during the cyclic loading process.
Experimental Validation
The numerical results obtained from Abaqus are compared with the experimental results reported in the reference article.
The comparison focuses on the force–displacement hysteresis response and the deformation behavior of the connection during cyclic loading.
The numerical results show good agreement with the experimental results, demonstrating that the Abaqus model can reproduce the main characteristics of the experimental response.
Key Features
- Seismic analysis of a beam-to-column connection with an opening.
- Cyclic loading of the beam.
- Nonlinear analysis using Abaqus.
- Buckling of the beam flange and beam web.
- Force–displacement hysteresis response.
- Comparison with experimental results.
- Validated numerical model.
- Complete Abaqus model files.
- Excel file for amplitude loading.
- Excel file containing numerical results.
- Reference research paper.
- Step-by-step video tutorial.
What You Will Learn
- How to model a beam-to-column connection with an opening in Abaqus.
- How to define the geometry and material properties of the model.
- How to define the required interactions between the structural components.
- How to define boundary conditions for a beam-to-column connection.
- How to apply cyclic loading to the end of the beam.
- How to define cyclic loading using the Amplitude option in Abaqus.
- How to perform nonlinear analysis under cyclic loading.
- How to investigate buckling of the beam flange and beam web.
- How to obtain a force–displacement hysteresis diagram.
- How to extract and process Abaqus results using Excel.
- How to compare numerical and experimental results.
Reference
This project is based on the experimental research study used as the reference for the numerical simulation.
The reference paper is included with the project files and can be used to review the experimental setup, loading protocol, and reported results.
Project Information
Important information about this project
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