Equation-Based Modeling of Shape Memory Alloys for Reinforcement of Masonry Structures Against Out-of-Plane Excitation
Kacper Wasilewski, Artur Zbiciak, Wojciech Terlikowski
TL;DR
This paper introduces a new equation-based model for shape memory alloys to improve the seismic resistance of masonry structures.
Contribution
A novel equation-based model for SMA superelasticity is proposed, with parameters directly tied to experimental data.
Findings
The proposed model accurately captures SMA superelasticity under isothermal conditions.
SMA-based ties outperform traditional steel ties in reducing damage and improving structural performance during seismic events.
Abstract
The incorporation of advanced smart materials, such as shape memory alloys (SMAs), in civil engineering presents significant challenges, particularly in modeling their complex behavior. Traditional numerical SMA models often require material parameters that are difficult to estimate and validate. The objective of this paper is to introduce an equation-based approach to modeling the superelastic behavior of SMAs based on rheological models. The proposed phenomenological model accurately captures SMA superelasticity under isothermal conditions, with each material parameter directly correlated to data from standard mechanical experiments. Four modifications to the baseline rheological model are proposed, highlighting their impact on superelastic characteristics. The resulting constitutive relationships are expressed as non-linear ordinary differential equations, making them compatible with…
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Taxonomy
TopicsShape Memory Alloy Transformations · Masonry and Concrete Structural Analysis · Cultural Heritage Management and Preservation