doi:10.3850/978-981-08-6218-3_key-3
Advanced Analysis of Hybrid Frame Structures by Refined Plastic-Hinge Approach
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Professor Siu Lai Chan Department of Civil and Structural Engineering The Hong Kong Polytechnic University Hong Kong, China. ceslchan@polyu.edu.hk |
Biography
Siu-Lai Chan is a Professor in the Department of Civil and Structural Engineering at The Hong Kong Polytechnic University.
His research interests include the stability analysis and design of steel structures, nonlinear finite element analysis, glass and slender skeletal structures, steel, bamboo and aluminum scaffolding and pre-tensioning steel structures.
Sui Lai has published more than 250 papers in journals, books, conferences and keynote/invited papers in major steel conferences overseas. His book — Non-linear static and cyclic analysis of steel frames with semi-rigid connections (Elsevier, 2000, p336), summarises his work in the area before 2000.
Sui-Lai is a principal consultant of the Code of Practice for the Structural Uses of Steel (published by the Buildings Department). He developed a computer-based and practical design method bypassing the prescriptive use of effective length, charts and tables in Code. Since 1998, the “simulation-based” design method has been utilised in a number of practical steel structures in the region and was used in the 2008 and 2009 HKIE award winning projects in Hong Kong and Macau. In conjunction with Tongji University in China, Prof. Chan was given the Class I award by The Ministry of Education in Mainland China for work in nonlinear analysis and design of high rise buildings in 2009.
Abstract
Hybrid frames composed of steel, concrete and composite members are widely used to-date due to their structural efficiency, especially in high-rise buildings. The design of this form of structures is inconvenient as it needs several separate design codes for steel, concrete and composite elements. This paper proposes a nonlinear design method which only requires section capacity check without the use of different codes for the hybrid frame structures. By using the pointwise-equilibrium-polynomial (PEP) element allowing for initial imperfection in conjunction with a robust nonlinear incremental-iterative procedure, the second-order effects of individual members and the structural system can be modeled. The sectional fibre approach is used to determine the section capacity of arbitrary shape reinforced concrete or composite member subjected to axial force and biaxial bending. To fulfil the requirement of seismic design, progressive collapse analysis and advanced analysis, the refined plastic-hinge approach is utilized to model the plastic behaviour with strain-hardening effect. Once the initial and full yield surfaces are determined, the gradual yielding is simulated. Two examples are employed to demonstrate the validity and accuracy of the proposed method.
