Hourglass-shaped strip damper subjected to cyclic loading Abaqus

Product Overview

In this example, we intend to simulate the hourglass-shaped strip damper subjected to cyclic loading in the Abaqus software.

In this analysis, the behavior of the strip damper under cyclic loading is investigated and the numerical results are compared with the experimental results.

Hourglass-Shaped Strip Damper

The Hourglass-Shaped Strip Damper (HSD) is a metallic damper developed as an improvement to the conventional slit damper.

Unlike a conventional slit damper with strips of uniform width, the strips of the HSD have a smaller cross-sectional area near the middle height, giving the damper its hourglass-shaped configuration.

This configuration is designed to promote more uniform deformation along the strips and improve the ductility and energy dissipation of the damper under cyclic loading.

Test Setup

In this project, the C1/C2 specimen is modeled in Abaqus based on the experimental test.

The test setup used for the experimental study is presented in the following picture.

Cyclic Loading

The Hourglass-Shaped Strip Damper is subjected to cyclic loading in Abaqus to reproduce the experimental loading protocol.

The loading history is defined using an amplitude curve, allowing the prescribed displacement to be applied according to the experimental loading sequence.

Deformation and Energy Dissipation

Under cyclic loading, the strips of the Hourglass-Shaped Strip Damper undergo plastic deformation to dissipate seismic energy.

The hourglass-shaped configuration promotes a more uniform distribution of deformation and damage along the height of the strips, contributing to the ductile behavior of the damper.

The cyclic response of the damper can therefore be used to evaluate its ductility and energy dissipation capacity under repeated loading.

Force–Displacement Hysteresis Diagram

The force–displacement hysteresis diagram is obtained from the Abaqus results after applying the cyclic loading.

The hysteresis response is used to investigate the cyclic behavior, strength, ductility, and energy dissipation of the Hourglass-Shaped Strip Damper.

The numerical hysteresis response is then compared with the experimental results to evaluate the performance of the Abaqus model.

Comparison of Abaqus and Experimental Results

In this picture, the Force-Displacement hysteresis diagram obtained from the Abaqus software is compared with the experimental results.

As you can observe, the results obtained from the Abaqus software are very close to the experimental results.

Validation

This project has been validated, which means that the results obtained from the Abaqus software are similar to the results reported in the article.

In other words, this project is based on the reference article and the numerical model has been developed to reproduce the experimental behavior of the hourglass-shaped strip damper.

What You Will Learn

• How to model an hourglass-shaped strip damper in Abaqus.
• How to define the geometry of the strip damper.
• How to assemble the model.
• How to define the boundary conditions.
• How to apply cyclic loading to the strip damper.
• How to define the cyclic loading amplitude.
• How to obtain the Force-Displacement hysteresis diagram.
• How to compare the Abaqus results with experimental results.
• How to validate the numerical model using the reference article.

Key Features

• Hourglass-shaped strip damper modeling in Abaqus.
• Cyclic loading analysis.
• Cyclic loading amplitude definition.
• Force-Displacement hysteresis diagram.
• Comparison between Abaqus and experimental results.
• Validation against the reference article.
• Complete Abaqus CAE file.
• Abaqus INP file.
• Excel amplitude loading file.
• Excel results file.
• Reference research paper.
• Step-by-step video tutorial.

Reference

This project is based on the reference research article. The paper is included with the project files and can be used to review the experimental model, loading protocol, and reported results.