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Digital-Image-Correlation for Simulating Cyclic Local Buckling in Steel Beams
Related publications (36)
A Softening Constitutive Law and Gradient-Inelastic Fiber-Based Element for 3-Dimensional Frame Simulations Under Seismic Excitations
Steel frame structures are essential components of modern infrastructure. Understanding their behavior under seismic loading is critical for ensuring public safety and minimizing damage that occurs during earthquakes. To accurately predict the response of ...
EPFL2024Design of a Flexure-Based Flywheel for the Storage of Angular Momentum and Kinetic Energy
Simon Nessim Henein, Florent Cosandier, Hubert Pierre-Marie Benoît Schneegans, Patrick Robert Flückiger
The flywheel is a widespread mechanical component used for the storage of kinetic energy and angular momentum. It typically consists of cylindrical inertia rotating about its axis on rolling bearings, which involves undesired friction, lubrication, and wea ...
2024Geometric tolerances of welded connections with inelastic panel zones
Dimitrios Lignos, Andronikos Skiadopoulos, Ce Wen
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 ...
Ernst & Sohn2023Full Scale Experiments of a Composite Steel Moment Resisting Frame: Behavioral Insights and Implications on Seismic Design
Dimitrios Lignos, Hammad El Jisr
This paper discusses the cyclic performance of a heavily instrumented 2-bay full-scale composite-steel moment resisting frame (CMRF) sub-system from the onset of structural damage up until incipient collapse. The CMRF featured stiffened end plate bolted co ...
EEME2023The new Chapter 9 of Eurocode 8 Part 3 for Seismic Assessment of Existing Steel Structures
The seismic assessment of existing steel structures necessitates the development of practice- oriented engineering models for use in nonlinear static and dynamic analysis procedures. These models should encompass the full range of the anticipated nonlinear ...
2023Full-Scale Experiments of Cyclically Loaded Welded Moment Connections with Highly Dissipative Panel Zones and Simplified Weld Details
Dimitrios Lignos, Andronikos Skiadopoulos
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 ...
2023Energy dissipation in fiber-polymer composites adhesive joints under cyclic loading
Sustainable development has emerged as a paramount consideration in various fields of industry, including construction, to preserve the environment and its finite resources. Lightweight structures, such as fiber-polymer composite structures, address both s ...
EPFL2023Full-scale testing of European steel beams with reduced beam section under reversed cyclic loading
Dimitrios Lignos, Hiroyuki Inamasu
Steel beams with reduced beam section (RBS) are often used as part of prequalified connections in seismic regions. However, RBS connections are not as common in Europe. Reasons relate to easiness in fabrication, which requires on-site welding, and the seis ...
Springer Nature2022Seismic stability of steel moment resisting frames with inelastic panel zones
Dimitrios Lignos, Andronikos Skiadopoulos
This paper summarizes preliminary findings of nonlinear simulations aiming to quantify the seismic demands of codecompliant steel MRFs with variable panel zone targeted shear distortions, 𝛾!. The probability of beam fractures is explicitly considered in th ...
Earthquake Engineering Research Institute2022Assessment of Resistance Models According to SIA 263 & Eurocode 3 Provisions for Lateral Torsional Buckling of I-Shaped Hot-Rolled Members
In the European and Swiss steel construction standards, the stability verification of steel beams against Lateral Torsional Buckling (LTB) is considered with a decrease in bending resistance, reflected in reduction factors drown from buckling curves. In th ...
2022