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Welcome

Welcome to the web site for Dimitrios Lignos’ research group. Our work focuses on the development of performance-based assessment techniques and use of integrated experimental and analytical methods for the seismic design and evaluation of steel structures. We currently investigate the collapse capacity of conventional and high performance steel structures subjected to extreme earthquake loading. Recent work focuses on the utilization of innovative steel materials for multi-hazard mitigation, the development of rapid earthquake damage assessment techniques of infrastructure facilities, and the effect of welding procedures on heavy build-up members and high strength steel for the seismic and blast design of steel buildings. Of particular interest is the experimental evaluation of steel beam-columns, the evaluation of cumulative damage effects on steel beam-to-column connections and the development of high-fidelity computational models for performance-based evaluation of conventional and high performance steel structures.

Recent News
  • 03/23/2015: Dimitrios Lignos received the Sir William Dawson Scholar Award for Infrastructure Resilience for a five-year term. The William Dawson Scholar award recognizes a scholar developing into an outstanding and original researcher of world-class caliber who is poised to become a leader in his field, similar to that of a CRC Tier 2.

  • 02/26/2015: Dimitrios Lignos gave an invited presentation to University of Michigan Ann Arbor. The title of his presentation was Collapse Risk Assessment of Steel Special Moment Frames Designed with Deep Slender Wide-Flange Steel Columns.

  • 01/30/2015: Dimitrios Lignos, Ahmed Elkady, Omar Ibrahim, Violetta Nikolaidou, Mohammad Motalebi and Nathan Goldstein gave invited presentations as part of the Annual Workshop organized by ADF Group Inc. Steel Fabricators in Montreal, Canada. The presentations covered topics associated with current and future welding procedures for high strength steel and heavy assemblies that utilize jumbo cross sections and thick plates. Experimental findings associated with the behaviour of deep wide flange steel columns in seismic applications and the design and testing of extended beam-to-girder connections and copped beams were also presented.

  • 11/18/2014: Dr. Ramos, Prof. Mosqueda and Prof. Lignos published a new MCEER report related to the hybrid simulation of the seismic response of a steel frame building structure through collapse. The report is available from MCEER for free. You can download a pdf copy of the report from here.

  • 10/01/2014: A new version release (Version 1.2) of the software IIIDAP. is now released. The current version runs in Windows 7 and 8.

  • 09/26/2014: Dimitrios Lignos gave an invited webinar for modeling of steel moment resisting frames in OpenSees as part of the OpenSees Days workshop held in the PEER center at UC Berkeley. A youTube link for this presentation can be found here.

  • 07/30/2014: Dimitrios Lignos, Yusuke Suzuki and Ahmed Elkady participated in the 10th US National Conference on Earthquake Engineering. Papers from the conference are available from the NEES website.

  • 05/28/2014: Dimitrios Lignos received the ASCE Outstanding Reviewer Award 2013 in recognition of outstanding service as a reviewer for the American Society of Civil Engineers (ASCE), Journal of Structural Engineering.

  • Read more…