Majid Movahedi Rad

60522387300

Publications - 4

ELASTO-PLASTIC TOPOLOGY OPTIMIZATION UNDER CYCLIC LOADING FOR EFFICIENT STRUCTURAL DESIGN

Gábor Csaba Soóki-Tóth Majid Movahedi Rad Muayad Habashneh Somfai Attila Majid Movahedi Rad

Publication Name: Compdyn Proceedings

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: 3401-3412

Description:

This study introduces an elasto-plastic topology optimization approach tailored for structural systems subjected to cyclic loading. By incorporating material nonlinearity, the method provides a robust framework for designing structures that withstand repetitive loading efficiently, avoiding excessive material use. This optimization approach integrates the effects of cyclic loading to enhance structural resilience while minimizing mean compliance. The proposed method is particularly applicable for optimizing structural components in steel frameworks where material efficiency and load-bearing capacity are critical. By emphasizing the elasto-plastic behavior of materials, this study aims to offer a practical tool for engineers seeking resilient structural designs that balance strength and sustainability. Potential applications extend to structural elements in earthquake-resistant buildings, where managing material use is essential for both environmental and economic impact.

Open Access: Yes

DOI: 10.7712/120125.12661.25046

FATIGUE TOPOLOGY OPTIMIZATION UNDER CYCLIC LOADING FOR INNOVATIVE STRUCTURAL DESIGN

Majid Movahedi Rad Muayad Habashneh Géza Herczeg Gábor Erika Majid Movahedi Rad

Publication Name: Compdyn Proceedings

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: 3389-3400

Description:

This study proposes a fatigue topology optimization approach for structural systems subjected to cyclic loading. Recognizing the impact of repeated loading on material endurance, the method incorporates fatigue considerations into the optimization process to enhance the durability and sustainability of load-bearing structures. By factoring in cyclic loading effects, this approach aims to reduce excessive material use while improving structural resilience, aligning with objectives for efficient and sustainable design. The proposed method is particularly useful in optimizing structural components in steel frameworks, where fatigue resistance and material efficiency are critical under dynamic loads. Emphasizing a balance between strength and durability, this study offers a practical tool for engineers aiming to design resilient structures that can endure cyclic stress without unnecessary material consumption. Furthermore, this framework is envisioned as a valuable solution for cyclic load environments, supporting more sustainable and resource-efficient engineering practices.

Open Access: Yes

DOI: 10.7712/120125.12660.25045

GENETIC ALGORITHM-BASED OPTIMIZATION OF BOLTED T-STUB CONNECTION UNDER DYNAMIC LOADING USING FINITE ELEMENT ANALYSIS

Ákos Wolf Majid Movahedi Rad Péter Grubits Majid Movahedi Rad

Publication Name: Compdyn Proceedings

Publication Date: 2025-01-01

Volume: Unknown

Issue: Unknown

Page Range: 3413-3423

Description:

The equivalent T-stub technique is widely utilized as a design solution for steel bolted connections, which are otherwise complex to analyze. However, traditional standard-based methods often lack the precision required for accurate analysis, particularly when accounting for dynamic effects, such as those caused by earthquakes, leading to designs that may not be sustainable. This research addresses this issue by introducing a framework aimed at optimizing the bolt layout in a selected T-stub connection to maximize structural performance under cyclic loading, thereby enhancing sustainability. The finite element method (FEM) was employed to account for nonlinear characteristics, including the elastic-plastic behavior of steel, large deformations, and contact nonlinearities, ensuring precise analysis. The developed T-stub model was validated against experimental tests to reflect real-world behavior, utilizing ABAQUS finite element software. Optimization was conducted using a genetic algorithm (GA) implemented in the PYTHON programming language, linked to the simulation process. The results demonstrate the effectiveness of the proposed framework in significantly enhancing the structural performance of the steel T-stub connection under cyclic loading conditions without requiring additional material, thereby contributing to a more sustainable design.

Open Access: Yes

DOI: 10.7712/120125.12662.25059

Overstrength assessment of innovative metallic I-shaped damper

Ali Ghamari Majid Movahedi Rad Seong Hoon Jeong Majid Movahedi Rad

Publication Name: Steel and Composite Structures

Publication Date: 2026-03-25

Volume: 58

Issue: 6

Page Range: 719-737

Description:

This study investigates the overstrength factor (Ω of an innovative-shaped metallic shear damper designed for enhancing seismic resilience in concentrically braced frames (CBFs . To evaluate the influence of geometric variables-including web/flange thickness, damper height, and slenderness ratios (λw, λf, λℎ-a parametric study was conducted using 100 finite element models validated against experimental tests. The results demonstrate that all considered-shaped dampers exhibit Ω values exceeding 1.5, surpassing the A SC recommendations for shear links. t was found that while increasing web plate thickness significantly improves ultimate strength (up to 2.35 times, it tends to reduce Ω . Conversely, increasing flange thickness enhances both ultimate strength and Ω, challenging current guidelines that often neglect flange contributions. Specifically, within the flange slenderness range of 10 ≤ λf ≤ 15, the reduction rate of structural parameters is most significant. To ensure balanced seismic performance and economic efficiency, this study proposes designing dampers with a web slenderness ratio of λw ≤ 33 and a strength ratio of Ψ > 5.0. These findings offer uuantitative insights for refining design guidelines to accurately reflect the damper’s overstrength capacity.

Open Access: Yes

DOI: 10.12989/scs.2026.58.6.719