Date, time & venue
2022-04-21;5:00pm to 6:00pm;Zoom (online)
Steel is a high-strength construction material with good toughness used extensively in modern structures, which is environmentally friendly due to its high recyclable content and recycling rate, suitable for sustainable urban development with pollution greatly reduced by use of electric arc furnaces in recent years. With the benefits of using steel, modern steel structures usually have unusual and futuristic geometries, presenting certain structural design challenges. Modern structural design relies heavily on the ubiquity and power of computer software to perform rigorous numerical simulations of structures under design loads. For steel structures, this design method, namely the direct analysis method based on the concept of nonlinear simulation of structural response in large deflection and inelastic range, has been included in prevalent design specifications, such as AISC-2016, Eurocode-3, GB50017-2017 and Hong Kong Steel Code 2011, for numerous steel structures with sufficient proof of its robustness and reliability. The essential component of this method is the numerical algorithms to simulate the structural system with complex nonlinear characteristics. Over the last decade, new steel materials and new structural forms have been gradually adopted in modern steel structures, and therefore, the traditional numerical algorithms are sometimes inapplicable and they hinder the development of new efficient structural systems. With the unprecedented need to develop the design method for modern steel structures, the presenter has been researching advanced numerical algorithms for over a decade and has developed several innovative numerical algorithms for modern structural design based on the concept of direct analysis method. This talk will discuss the challenges in the design of modern steel structures, the scientific research developments, the innovative design, the software implementations, and the practical applications. Future development of innovative direct analysis to cover new structural forms will be charted, which includes stability check of structures under fire and earthquake.
About the Speaker:
Dr Liu Siwei is an assistant professor in CEE at PolyU. His research mainly focuses on computational structural engineering and advanced design of modern steel structures. He received a Grand Award in Research in 2020 from HKIE, a Commendation Award in Research in 2018 from HKIE and anotherGrand Award in Research in 2016 from joint structural division of HKIE and IStructE in UK. He has co-developed structural analysis and design software, including RCD2016 and NIDA10. He developed a tapered element analysis method for the successful design of the MGM Macau resort’s single-layer dome, which is, according to Guinness Records, the world’s longest single-layer dome. His work is both practical and academically advanced, and he has worked as a principal member in specialist teams for leading structural consultants, government departments and contractors in Hong Kong.
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