Publications de Dimitrios Lignos

Evaluation of overstrength-based interaction checks for columns in steel moment frames

A study is presented to examine the implications of this guidance, which disregards the column interaction check (including both axial force and moment) under overstrength seismic loads. A set of thirteen steel moment frames are designed using multiple rul ...

2025

A Multiaxial Plasticity Model with Softening for Simulating Inelastic Cyclic Local Buckling in Steel Beam Columns Using Fiber Elements

Albano António De Abreu E Presa De Castro E Sousa, Diego Isidoro Heredia Rosa, Dimitrios Lignos

This paper proposes a new effective multiaxial plasticity model to simulate inelastic cyclic buckling in steel frame members. The proposed constitutive formulation is expressed within the framework of rate-independent metal plasticity and replicates the pr ...

American Society of Civil Engineers (ASCE)2025

Hysteretic Behavior of Circular Hollow Section Panel Zones in Beam-to-Column Subassemblies with Large Panel Aspect Ratio

Dimitrios Lignos

This paper aims to comprehend the behavioral aspects of beam-to-column subassemblies with highly dissipative circular hollow section (CHS) panel zones with emphasis on those with large panel aspect ratios (i.e., greater than 1.5) via experiments and contin ...

American Society of Civil Engineers (ASCE)2025

Special Issue: Large‐Scale Testing of Earthquake‐Resistant Structures: Accomplishments and Future Challenges

Dimitrios Lignos

Summary Advanced experimental techniques for dynamic and quasi‐static testing Quantification of system‐level effects via physical experimentation Robust identification of dynamic and mechanical properties of structures via state‐of‐the‐art instrumentation ...

Wiley2025

A Multiaxial Plasticity Model with Softening for Simulating Inelastic Local Buckling in Steel Beam Columns under Monotonic Loading through Fiber Elements

Diego Isidoro Heredia Rosa, Dimitrios Lignos

This paper proposes a novel multiaxial plasticity model for 3-dimensional nonlinear static analysis of steel frame buildings with fiber-based beam-column elements. The proposed constitutive formulation is expressed within the framework of rate-independent ...

2025

STEEL-3dPointClouds: dataset supporting quantification of residual life and reusability of steel beam-columns

Isinsu Katircioglu, Dimitrios Lignos, Guillaume Romain Obozinski, Nenad Bijelic

This paper presents STEEL-3dPointClouds, a dataset of deformed steel beam-columns obtained using high-fidelity physics-based numerical simulations. These simulations trace the inelastic deformations of hot-rolled wide-flange steel beam-columns under differ ...

Springer Science and Business Media LLC2025

Simulating Interactive Buckling in Steel Members Using a Torsional Fiber Element Integrated with a Multiaxial Local Buckling Constitutive Model

Albano António De Abreu E Presa De Castro E Sousa, Diego Isidoro Heredia Rosa, Dimitrios Lignos

American Society of Civil Engineers (ASCE)2025

Proposed Stiffener Spacing Requirements for Intermediate Length Links in Eccentrically Braced Frames

Dimitrios Lignos

This paper assesses the stiffener spacing design requirements according to AISC-341-22 for intermediate length links in eccentrically braced frames (EBFs) through nonlinear continuum finite element simulations of 40 different intermediate length links. In ...

American Society of Civil Engineers (ASCE)2025

Shake table tests on nonlinear steel fuses for the acceleration-control of nonstructural components

Dimitrios Lignos

During recent major earthquakes, modern seismically designed buildings have demonstrated a low risk of collapse and life-safety limit states. However, both direct and indirect economic losses are often primarily due to damage to nonstructural components. T ...

SAGE Publications2025

Sharing data and code facilitates reproducible and impactful research

Dimitrios Lignos

Modern research often involves the collection or analysis of data and the use of specialized computer algorithms. Traditional text articles thus provide only partial documentation of a research study. Readers have limited ability to reproduce or utilize wo ...

2024

Modelling and Experimental Investigation of Ductile Crack Initiation in Welded Connections with Bevelled Backing Bars and Inelastic Panel Zones

Dimitrios Lignos, Andronikos Skiadopoulos

In pre-qualified welded connections, current design and fabrication rules that were formulated after the 1994 Northridge earthquake necessitate high-notch toughness weld requirements and rigorous treatment in the weld backing bar region, including the back ...

Springer Science and Business Media Deutschland GmbH2024

A Novel Fiber Element to Simulate Interactive Local and Lateral Torsional Buckling in Steel Moment Frames

Diego Isidoro Heredia Rosa, Dimitrios Lignos

All rights reserved.Structural collapse in steel frames under extreme hazards (earthquake, blast etc.) can often be attributed to loss of load carrying capacity of the individual members. Dominant failure modes in structural steel members include interacti ...

Structural Stability Research Council2024

Uniaxial material model with softening for simulating the cyclic behavior of steel tubes in concrete-filled steel tube beam-columns

Dimitrios Lignos

Earthquake Engineering & Structural Dynamics published by John Wiley & Sons Ltd.This paper presents a new uniaxial constitutive material formulation with softening for simulating the inelastic behavior of steel rectangular tubes in concrete-filled steel tu ...

2024

Proposed Limits of Stiffener Spacing Requirements for Short and Intermediate Length EBF Steel Links

Dimitrios Lignos

The seismic performance of Eccentrically Braced Frames (EBFs) relies on the inelastic behavior of the respective steel link. Depending on their geometric characteristics, EBF links are categorized as short, intermediate, and long. These should respect perf ...

Springer Science and Business Media Deutschland GmbH2024

Beam-column joint structure

Dimitrios Lignos, Andronikos Skiadopoulos

A beam-column joint structure (1) including: a column (11) and an I-beam (212) with a pair of beam flanges (216) of the I-beam joined directly to joint plates (16) of the column main body via a welded section (218); wherein at the intersect position (P1), ...

2024

Seismic Performance of Steel Moment-Resisting Frames Utilizing Dissipative Embedded Column Base Connections

Dimitrios Lignos, Nenad Bijelic

Experimental and numerical studies on steel wide-flange columns as part of steel moment-resisting frames (MRFs) revealed that their seismic performance can be compromised when seismically compact, yet relatively slender cross sections are adopted. One aspe ...

Springer Science and Business Media Deutschland GmbH2024

Cyclic pushover analysis for seismic response evaluation of a full-scale 10-story steel building tested on the E-Defense shake-table

Dimitrios Lignos

This study presents a reliable and straightforward structural analysis method, cyclic pushover analysis (CPA), coupled with a simplified numerical simulation approach to capture global and local nonlinear seismic responses of the E-Defense 10-story test st ...

2024

Full-Scale Tests to Characterize the Effect of Framing Action and Slab Continuity on the Collapse Capacity of Composite Frames Under Cyclic Loading

Dimitrios Lignos, Hammad El Jisr

This paper presents an experimental study that examined the role of the slab continuity and framing action on the overall hysteretic behavior of a composite-steel moment resisting frame (MRF) up until incipient collapse using advanced instrumentation. The ...

2024

Towards instability-free welded moment connections

Dimitrios Lignos, Andronikos Skiadopoulos

In capacity-designed steel moment resisting frames (MRFs), inelastic deformations are mostly concentrated in the steel beams and the column fixed ends of the first story, while the participation of the panel zones in energy dissipation is limited. In such ...

2023

Digital-Image-Correlation for Simulating Cyclic Local Buckling in Steel Beams

Albano António De Abreu E Presa De Castro E Sousa, Dimitrios Lignos, Selimcan Ozden

Nonlinear continuum finite element (CFE) analyses rely on accurate multiaxial constitutive law formulations along with reliable imperfection patterns for simulating nonlinear geometric instabilities in steel members under mechanical loading. Validations of ...

Wiley2023