Prof. Ali Cheshmehzangi
University of Nottingham Ningbo ，China
Head of Department of Architecture and Built Environment, Professor of Architecture and Urban Design
Professor Ali Cheshmehzangi is Head of the Department of Architecture and Built Environment and Director of the Centre for Sustainable Energy Technologies (CSET), at The University of Nottingham Ningbo China (UNNC). He is a Full Professor in Architecture and Urban Design at UNNC and a Specially Appointed Professor at Hiroshima University, Japan. He has published 90+ journal papers and seven books. His two recent books are published in 2020, titled ‘Identity of Cities and City of Identities’ (April 2020), and ‘The City in Need’ (June 2020). He has just completed his new co-authored book on ‘Sustainable Urbanism in China’, which is due to publication in April/May 2021. He is also completing his newest book on ‘Urban Memory in City Transitions’, which is finishing by the end of January 2021.
Urban Design Practices and Achieving Sustainable Urbanism Principles
Extracted from our two earlier publisher books on ‘Sustainable Urban Development in the Age of Climate Change’ (Oct 2018) and ‘Designing Cooler Cities’ (Nov 2017) and our forthcoming book on ‘Sustainable Urbanism in China’ (Apr/May 2021), this talk focuses on specific urban design practices in achieving sustainable urbanism principles. The arguments are based on sustainable practices that we should consider in facing climate change impacts on cities. This talk first explores the role of contemporary urban designer, and then addresses challenges that cities are facing or will be facing as a result of climate change impacts. A range of suggestions are given to point out the role of urban design and highlight how – as a discipline - it should fit in to this new age of climate change impacts. This talk specifically addresses how urban design practices achieve sustainable urbanism principles. Visions brought forward from this session will look into considerations that are hoped for augmented mitigation strategies rather than climate change adaptation measures. The main intention is to highlight the importance of sustainable urbanism in the future stages of urbanisation and urban development across the globe.
Prof. Chiew Yee Meng
Nanyang Technological University,Singapore
Sediment transport; scour; turbulence; hydraulic/coastal/offshore engineering
Dr. Chiew Yee Meng, who currently is a Professor in the School of Civil and Environmental Engineering at Nanyang Technological University (NTU), has forty years of research and consulting experience in the field of sediment transport, scour and erosion, turbulence, hydraulics and coastal/offshore engineering. He particularly is interested in scour at hydraulic structures such as bridge piers, submarine pipelines, monopiles, ship propellers, culverts, bridge abutments, jets, etc. and how such erosion affects the integrity of the surrounding structures and sediment bed. His research interests also include how turbulence affects fluvial and coastal hydraulics and their overall engineering impact and the effect of seepage on the turbulence characteristics in both open channel and closed-conduit flows. Dr Chiew has close to two hundred archival publications and serves as an Associate Editor of Journal of Hydraulic Engineering, ASCE and International Journal for Sediment Research (IJSRC). Throughout his career, Dr Chiew has acted as a specialist consultant to numerous international and local companies as well as governmental organizations, offering his expert advice to solve challenging engineering projects.
Submarine Pipeline Scour
Besides being an extremely complex and intriguing physical system that involves sediment-fluid-structure interactions, submarine pipeline scour leading to structural failure can cause dire environmental impact on the surrounding aquatic ecosystem as well as triggering significant economy loss to the related industry. Despite having recognized such a threat for decades, many industries that involved using subsea pipelines, particularly those in the oil and gas industries, continue to rely on very simplistic solutions based on laboratory studies conducted with 2-dimensional model pipelines many decades ago for their design. It is only in the past 30-40 years that more concerted efforts have been devoted to systematic and intensive researches, involving experimental and numerical studies from around the world in this subject. Such studies initially involved works associated with a 2-dimensional pipeline scour before venturing into the 3-dimensional domain both experimentally and numerically. In the most recent works, researches have been extended to investigating vibration effects on both 2D and 3D pipeline, including scour that forms at the touchdown point of a steel catenary riser. Notwithstanding such rigorous works in recent years, a full understanding of this complex physical system remains hitherto elusive. Consequently, the risks involved with the formation of scour holes leading to pipeline failure remain. The present talk summarizes recent research findings from around the world, focusing on vibration effects on scour at the touchdown point of a steel catenary riser. The study reveals that the profile and dimension of the scour hole around the vibrating riser is significantly different from that observed in either a 2D or 3D submarine pipeline. Thoughts on future research in this area also will be highlighted in the talk.
Xi’an Shiyou University，China
Strength Theory and Its Application, Dynamic Response of Structure Under Impact Load
Ying Cui, associate professor, doctor of civil engineering (post), who graduated from the school of civil engineering, Chang'an University. He is currently the director of the department of civil engineering and the head of the undergraduate major of civil engineering in Shiyou university. He is a visiting scholar of Manchester University in the UK. He is mainly engaged in civil engineering and mechanics related professional teaching and research work. His research field is the evaluation of blast resistance of structural members. Moreover, he also does some researches in the aspects of mechanical strength theory and its application.
Research on Damage Assessment of Concrete-Filled Steel Tubular Column Subjected to Near-Field Blast Loading
Concrete-filled steel tubular (CFST) columns are widely used in engineering structures, and they have many different cross-section types. Among these, normal solid sections and concrete-filled double-skin steel tubular sections are often used. In this study, experimental analysis and a numerical simulation method were integrated to evaluate the responses and assess the damage of two concrete-filled steel tubular (CFST) columns with different cross sections subjected to near-field blast loading. Using pressure–impulse damage theory and the validated numerical simulations, two pressure–impulse damage evaluation curves for NSS and CFDST columns were established separately by analysing the experimental and simulation data. Furthermore, the mathematical formulae for the two different column types were established to generate pressure–impulse diagrams. With the established formulae, the damage of the CFST columns with these two cross-section types can be evaluated. Damage to other similar CFST columns with different cross-section types due to near-field blast loading can also be evaluated by this method.