Within the ANR Project MODULATE, the 5th and last work package (WP5) is concerned with the study of Seismic Reliability of large-scale infrastructure. The scope of WP5 is to exploit results from previous WPs for developing a rigorous basis for reliability assessment and fragility analysis of large-scale infrastructure.
WP5 aims further at interpreting the above developments for proposing a set of realistic guidelines for quantifying the effects of surface waves on seismic design.
WP5 includes two tasks:
- Vulnerability assessment of structures subjected to surface waves
- Recommendations for seismic risk assessment of large-scale structures subjected to surface waves.
WP5 culminates to novel fragility curves for long-period structures and to practical guidelines for quantifying the effects of surface waves destined to practicing earthquake engineers.
- Exploit results from surrogate and detailed models developed in the previous WPs for a rigorous reliability assessment of large-scale infrastructures
- Propose new vulnerability assessment procedures for structures subjected to surface waves. This is performed in a twofold effort by:
- Creating novel methodologies for the construction of fragility curves that take into account the dispersive nature of surface waves
- Adapting existing Incremental Dynamic Analysis methodologies for record sets, intensity and damage measures relevant to long-period structures and motions enriched with surface waves.
- Exploit the developments within WP5 and the previous WPs for proposing realistic guidelines for the effects of surface waves on applied seismic design
- Analysis of results from previous WPs for the identification of long-period structure configurations that are vulnerable to effect of surface waves
- Development of correlations between the nonlinear structural response (as obtained with surrogate and detailed models) to ground motion excitation
- Implementation of novel methods in the context of Incremental Dynamic Analysis (IDA) methodology for probing the evolution of specific performance criteria in large-scale infrastructures / Comparisons of IDA curves between surface-wave compatible and conventional ground motions.
- Development of novel fragility curves for long-period structures with consideration of surface wave effects.
- Quantification of seismic margins required for the detrimental basin effects and comparison with normative safety factors
- Development of recommendations for modifications to current design methodologies for buildings, tanks and bridges to include the effects of surface waves
- Proposals and recommendations for revision and enrichment of applicable design norms
WP leader: Charisis Chatzigogos (GDS)