High Fidelity Modeling Resilience Enhancement and Smart Sensing of Critical Infrastructures Exposed to Multihazard
Wednesday, August 5, 2020
Submitted by: Professor Chao Sun, Ph.D., A.M. ASCE, Louisiana State University
Critical civil infrastructures (residential buildings, bridges, offshore wind turbines, oil/gas rigs, pipelines, power transmission/distribution systems, etc.) nowadays face serious issues of aging and are more frequently impacted by earthquake and windstorm induced multi-hazards including earthquakes, tsunamis, winds, storm surge/waves, flooding, and so on. The recent hurricanes (e.g., Hurricanes Harvey, Mike, Irma and Dorian) have caused tremendous structural damage to critical infrastructures and cost tens of billions of dollars. The combined loading effects and structural nonlinearity render the structural dynamic characteristics more complex than usual, which will inevitably undermine the structural performance, damage the structural integrity and cause huge loss of properties and lives. Unfortunately, characterization of the combined wind-wave-surge loading (especially the transient and variable nature) and the comprehensive failure mechanism of the critical infrastructures exposed to the combined loading, which is the foundation of building resilient infrastructures and communities, is not well understood currently.
To achieve multi-hazard resilient infrastructures and communities, researchers at the Complex Dynamics and Smart Sensing (CDSS) lab at Louisiana State University focus their research effort on:
- advancing the fundamental understanding of combined wind-wave-surge loading, and the complex behavior and failure mechanism of critical
- physical vulnerability assessment of individual and community-level infrastructures,
- resilience enhancement of critical infrastructures exposed to earthquake and windstorm induced multi-hazard,
- smart sensing and damage diagnosis/prognosis of critical infrastructures to achieve secure operation and optimized management/maintenance.
Figure 1 illustrates the overall long-term research goals and methodologies of the CDSS lab at Louisiana State University (LSU). Some completed and ongoing research projects are described as follows.