Luigi di Sarno (University of Liverpool, UK)
Dr. Luigi Di Sarno is Senior Lecturer in Structural Design in the School of Engineering at the University of Liverpool, UK, and he has been Visiting Professor at the Mid-America Earthquake Center, headquartered at University of Illinois, Urbana-Champaign, USA, since 2002. He is Honorary Member Staff at the College of Engineering, University of Bristol, UK, since 2011. Other visiting appointments include Imperial College of London, UK, University of Bogazici, Turkey, University of Toronto, Canada, University of California at Los Angeles, USA and INTEC, Dominican Republic. He is recognized as a global leader in the field of earthquake engineering and structural retrofitting of existing structures. He is the Founder and Research Leader of the multi-disciplinary group Resilient and Sustainable Infrastructures (RSI) headquartered at the University of Liverpool, UK. His research interests include: (i) seismic analysis, design and retrofitting of critical structures and infrastructures, especially with base isolation and supplemental damping, (ii) analysis and design of tall buildings subjected to extreme loads and (iii) advanced experimental testing and numerical simulation. He currently is PI and Co-I of multi-million EU-funded research projects dealing with the seismic design, assessment and retrofitting of buildings (FUTURE, HITFRAMES), non-structural components (SEREME, RELUIS), advanced hybrid tests for seismic soil-structure interaction (COSMO, SHATTENFEE), seismic response of natural gas pipelines (EXCHANGE RISK) and resilience of petrochemical plants (XP-RESILIENCE).
Dr. Di Sarno has authored more than 250 research publications, including refereed journals, conference papers, research reports, book chapters and field investigation reports. He has co-authored with A.S. Elnashai the two editions of the book: Fundamentals of Earthquake Engineering, edited by Wiley & Sons.
Dr. Di Sarno acts as a technical reviewer of several international journals dealing with structural analysis and design, seismic assessment and vulnerability. He is part of the editorial board of international journals dealing with structural engineering.
Seismic Vulnerability Assessment of Steel Petrochemical Steel Pipe-racks: Current Practice and Research Needs
The investigation of the seismic vulnerability of petrochemical plant steel structures should be commensurable to their importance given the high necessity for human life safety and financial robustness. To date, it is demonstrated in the existing literature that still many grey areas of knowledge exist upon the appropriate application of code provisions on non-building structures design. The selection of seismic design parameters such as system performance factors or important classes are still vague aspects, in contrast with those for common building structures, either because of the paucity of information of seismic codes or due to the structural peculiarities relevant to the industrial structures resulting in the difficulty of defining ‘all-encompassing’ design parameters. This presentation provides a comprehensive discussion of such design parameters, highlighting the current code-based practice and emphasizing the research needs. To do so, a case-study that pertains to a realistic steel pipe rack is considered. The elastic and inelastic (static and dynamic) response of the pipe rack is analysed with advanced numerical simulations. It is demonstrated that the common nonlinear static analysis (pushover analysis) cannot be used to assess the response of the rack and the behaviour factor selection from current standards could be unjustifiable. Also, common engineering demand parameters, e.g. interstorey drift ratio, need further assessment vis-à-vis the response of nonstructural components of which the current design method does not comply with modern methods.