Keynote Lectures

Prof. Dan M. Frangopol
Prof. Dan M. Frangopol (Lehigh University, USA)

Brief Biography

Dr. Frangopol is the inaugural holder of the Fazlur R. Khan Endowed Chair of Structural Engineering and Architecture at Lehigh University. Before joining Lehigh University in 2006, he was Professor of Civil Engineering at the University of Colorado at Boulder, where he is now Professor Emeritus. He is recognized as a leader in the field of life-cycle engineering of civil and marine structures. His main research interests are in the application of probabilistic concepts and methods to civil and marine engineering including structural reliability, probability-based design and optimization of buildings, bridges and naval ships, structural health monitoring, life-cycle performance maintenance, management and cost of structures and infrastructures under uncertainty, risk-based assessment and decision-making, infrastructure sustainability and resilience to disasters, and stochastic mechanics.

Dr. Frangopol is the Founding President of the International Associations for Bridge Maintenance and Safety (IABMAS) and Life-Cycle Civil Engineering (IALCCE). He has authored/co-authored over 350 articles in archival journals including 9 prize winning papers. He is the Founding Editor of Structure and Infrastructure Engineering and of the Book Series Structures and Infrastructures. Dr. Frangopol is the recipient of several medals, awards, and prizes, from ASCE, IABSE, IASSAR, and other professional organizations, such as the OPAL Award, Newmark Medal, Ang Award, T.Y. Lin Medal, Khan Medal, and Croes Medal (twice), to name a few. He holds 4 honorary doctorates and 12 honorary professorships from major universities. He is a foreign member of the Academia Europaea and the Royal Academy of Belgium, an Honorary Member of the Romanian Academy of Technical Sciences, and a Distinguished Member of ASCE.

Risk, Resilience and Sustainability of Structures: Towards a Life-Cycle Cost Probabilistic Approach


There is increasing recognition that moving towards a life-cycle cost analysis (LCCA) approach under uncertainty holds the potential for reduced total lifetime cost and improved performance of structures during their lifetime. While significant progress has been made in developing concepts and methods for LCCA of new and existing structures, much work is still needed to move towards more widespread adoption of these concepts and methods. This keynote paper provides an overview of LCCA approach associated with risk, resilience and sustainability of structures in a probabilistic system optimization context, presents applications to steel structures, and discusses some of the remaining challenges in implementing LCCA in the decision-making process.
Prof. Roberto T. Le
Prof. Roberto T. Leon (Virginia Tech, USA)

Brief Biography

Dr. Roberto T. Leon is the David H. Burrows Professor of Engineering in the Via Department of Civil Engineering at Virginia Tech. Dr. Leon earned his BSCE from the University of Massachusetts at Amherst, his MSCE from Stanford University, and his Ph.D. from the University of Texas at Austin.

Over a 25 year career in experimental structural engineering, his research interests have centered on dynamic behavior and design of composite and hybrid steel-concrete structures, composite action in beam-slab systems, bond of reinforcement under cyclic loads, testing of full-scale and model structures in the laboratory, and field instrumentation of structures.

Dr. Leon has been/is extensively involved in technical committees, including the Building Seismic Safety Council Provisions Update Committee (BSSC/PUC), the American Institute of Steel Construction (AISC) TC-5 Composite Design, TC-9 Seismic Design, the Committee on Specification, and American Concrete Institute Committees 408 (Bond and Development length) and 352 (Beam-Column Joints). He is a registered professional engineer in Minnesota, the co-author of a book on composite construction, a non-technical book on bridges and tunnels, and is the author and co-author of over 130 articles in refereed journals.

Composite Construction: Challenges and Future Developments


Over the last 50 years, composite construction has become an accepted practice throughout the world, with extensive use in horizontal floor diaphragms and vertical lateral resisting elements such as composite columns and walls. This paper will discuss the background to changes to composite design in the USA for the AISC 360-16 and 341-16 specifications and its impact on design. The paper will then outline research needs and potential new uses of composite construction in the near fuure.
Prof. Guo-Qiang Li
Prof. Guo-Qiang Li (Tongji University, China)

Brief Biography

Guo-Qiang Li is currently a professor of structural engineering at the College of Civil Engineering in Tongji University, the director of Research Centro of Education Ministry of China for Steel Construction and the director of National Research Centro of China for Pre-fabrication Construction. He is also a vice-chairman of Chinese Society of Steel Construction and a vice-chairman of Chinese Association of Construction Standardization. In addition, He is a fellow of Institution of Structural Engineers in UK, an Honorary Fellow of Hong Kong Institute of Steel Construction.

Professor Li's research has been mainly in the area of hazard mitigation including earthquake-resistance, fire-resistance and blast-resistance for steel structures. He has been the principal investigator for more than 30 research projects funded respectively by Chinese Science and Technology Ministry, Construction Ministry, Education Ministry, Natural Science Foundation and Shanghai Government. He has published 13 technical books and more than 600 journal papers in Chinese and English relevant to his research topics.

Behavior of bolt bearing on high strength steel plate


High strength steel has been increasingly used in high-rise buildings, bridges and long span spatial structures. The bolted connection is one of the most common joining methods for steel members. In bearing-type bolted connections, the bearing resistance is developed accompanied with significant plastic deformation around the bolt hole due to high stresses and stress concentration. However, the ductility of steel decreases with the increasing of the yield strength. Since the current design codes are established on the experimental results of normal strength steel with a favorable ductility, the applicability of existing codes to high strength steels needs to be checked. This paper presents an experimental research on bearing-type bolted connections, including single-bolt connections, two-bolt connections (positioned perpendicular and parallel to the load direction) and three-bolt connections (positioned perpendicular to the load direction). The effect of steel grade on the ultimate strength and local deformation capacity of bolted connections using high strength steels was evaluated. A regression analysis was performed based on the test data and those from the literature so that a more general method was proposed to predict the bolt bearing resistance on normal strength and high strength steel plate. In addition, a numerical model was developed to simulate the bearing behavior and the failure modes of the bolted connections using high strength steel.
Prof. Kenichi Kawaguchi
Prof. Ken'ichi Kawaguchi (University of Tokyo, JAPAN)

Brief Biography

Dr.Ken'ichi Kawaguchi is a professor in the Institute of Industrial Science, the University of Tokyo.

He started his academic carrier in the study on numerical analysis of kinematically indeterminate structures. He also handles structural design of buildings and practical developments of structural devices. He has developed the tension truss system and constructed a dome in 1991. He also designed a world first typical tensegrity structure, White Rhino in 2001 and new faculty building for department of engineering in the University of Tokyo in 2006. He has also proposed and developed two new types of seismic base-isolation systems, one of which has been already put in the commercial and several houses were constructed with the system. He has kept warning the dangerous failure of ceilings in large public spaces since Kobe earthquake in 1995 and the warning became true in the Japan earthquake 2011. Then his proposal of using lighter ceiling material, such as textile membrane, instead of heavy plasterboards, has been quickly and widely getting popularity.

Since 2004 he has been a member of Executive Council of the IASS, the International Association for Shell and Spatial Structures. He is currently serving as one of the vice presidents of IASS since 2012.

Development of Prestressed Lightweight Steel Frames: Tensegrity skeletons and tension truss system


The author has been working on the development of lightweight structures, especially, prestressed steel frame structures including Tensegrity skeletons. The paper will briefly review the three examples of prestressed steel frame structures designed by the author, i.e. a tension truss dome and two membrane roofs supported by tensegrity skeletons. For prestress introduction, no hydraulic nor mechanical jacks were used. Only human manual power and operation was employed for the sensitive control of prestress introduction.