Publications by Dimitrios Lignos

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Infrastructure (asset) risk management is essential for a resilient environment. Several industries are concerned to improve their building asset preparedness subject to seismic hazard. To this end, the development of software tools that quantify and asses ...

This paper quantifies the collapse risk and earthquake-induced losses for a wide range of archetype buildings with special concentrically braced frames (SCBFs). The collapse risk and expected economic losses associated with repair, demolition and collapse ...

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 ...

A warping-inclusive kinematic coupling method to be used in finite-element analysis of members featuring wide-flange cross sections is proposed in this paper. This coupling method is used in mixed-dimension macromodels that combine continuum and beam-colum ...

Local and member instability modes in structural steel members are influenced by initial geometric imperfections and residual stresses among other parameters. The robustness of stability-related design provisions and finite element modeling procedures of s ...

This paper presents the experimental results of two welded unreinforced flange-welded web (WUF-W) beam-to-column connections that defy the current design paradigm of prequalified welded connections. The proposed WUF-W connections feature customized beveled ...

Embedded Column Base (ECB) connections in seismically resistant steel moment frames are commonly designed to be stronger than the connected column, to protect them from inelastic actions. This relies on estimation of demands induced by the column and the s ...

Earthquake-induced collapse risk assessment of steel frame buildings requires the use of simulation models that can realistically replicate dynamic instability of frame buildings. Such models for steel columns should consider the coupling between the axial ...

Capacity-designed steel moment-resisting frames (MRFs) dissipate the seismic action through inelastic flexural yielding of protected zones located at the beam ends and the first story column bottom end. During low-probability of occurrence seismic events, ...

This paper intends to provide quantitative seismic response characteristics of steel moment resisting frames (MRFs) with inelastic beam-to-column panel zone joints. Two modeling approaches are proposed for this purpose along with a methodology to consider ...

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 ...

Rapid structural damage assessment methodologies are essential to properly allocate emergency response and minimize business interruption due to downtime in the aftermath of earthquakes. Within this context, data-driven algorithms supported by sensing capa ...

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 ...

Prequalified beam-to-column connections in steel moment resisting frames usually concentrate inelastic deformations in the steel beam ends. As such, nonlinear geo-metric instabilities (i.e., local buckling) may occur in these regions at modest lateral drif ...

Seismic performance assessment of new and existing steel structures based on nonlinear static (pushover) analysis necessitates the use of engineering‐oriented models that trace the nonlinear response of structural steel elements under static and cyclic loa ...

Tensile test data for structural steels are ubiquitous. Yet, the information monotonic loading provides with respect to the material's characteristics is limited. Notably, features of inelastic response to cyclic loading, such as the Bauschinger eect, can ...

A series of seismic tests were conducted on a 1½-bay by 1½-story special steel moment-resisting frame subassembly from the onset of damage through incipient collapse. These tests were conducted using hybrid simulation with substructuring as a mean to demon ...

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 ...

Hybrid simulations were conducted to evaluate the system-level seismic response of a 4-story steel moment frame building and its gravity framing system through various levels of ground motion shaking. The experimental substructure examined in detail corres ...

Dimitrios Lignos

Chat with Graph Search

EaRL: Toolbox for Earthquake Risk and Loss Assessment of Building Assets

Earthquake-Induced Collapse Risk and Loss Assessment of Steel Concentrically Braced Frames

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

Warping-Inclusive Kinematic Coupling in Mixed-Dimension Macro Models for Steel Wide Flange Beam Columns

Experimental Evaluation and Modeling of Residual Stress Distributions for Hot-Rolled Wide Flange Steel Members

Full-Scale Experiments of Cyclically Loaded Welded Moment Connections with Highly Dissipative Panel Zones and Simplified Weld Details

Seismic design of non-dissipative embedded column base connections

Fiber-based model for earthquake-induced collapse simulation of steel frame buildings

Concepts to minimize earthquake-induced column axial shortening in steel moment-resisting frames

Seismic demands of steel moment resisting frames with inelastic beam-to-column web panel zones

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

Assessment of structural damage detection methods for steel structures using full-scale experimental data and nonlinear analysis

Sharing data and code facilitates reproducible and impactful research

Geometric tolerances of welded connections with inelastic panel zones

Steel column stability and implications in the seismic assessment of steel structures according to Eurocode 8 Part 3

Cyclic metal plasticity model parameters with limited information: a constrained optimization approach

Earthquake-Induced Collapse Risk and Loss Assessment of Steel Concentrically Braced Frames

Seismic performance of a steel moment frame subassembly tested from the onset of damage through collapse

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

Experimental investigation of steel building gravity framing systems under strong earthquake shaking