Publications
598 results found
Nethercot DA, Stylianidis P, Izzuddin BA, et al., 2009, Enhancing the robustness of steel and composite buildings, Pages: 105-122
Methods intended for use in the design of steel and composite building frames covering the provision of adequate robustness so as to guard against progressive collapse are in the process of moving from prescriptive to quantitative. An approach that recognises all the important complex physical phenomena, employs a realistic criterion of failure and is capable of being implemented at a variety of levels has been devised at Imperial College London. Recent further development of this method has streamlined the necessary analyses, thereby making it possible to conduct parametric studies that provide insights into the link between changes to the structure and quantitative measures of resistance to progressive collapse. This approach is used herein to examine a number of different arrangements, from which key features of behaviour are identified. It has therefore been possible to isolate those structural modifications with the greatest potential for improving robustness and, moreover, to associate quantitative measures of that improvement with each scheme. Results for a series of arrangements, including several proposals put forward by Industry as methods of improving robustness based on the simple notion of increased tying capacity, are examined herein and general principles for improvement identified.
Salih EL, Gardner L, Nethercot DA, 2009, Bearing failure of bolted connections in stainless steel, Pages: 592-601
Using previously developed and validated finite element (FE) models of bolted connections in austenitic and ferritic stainless steel, an investigation into the bearing behaviour of stainless steel bolted connections has been carried out. The investigation showed that the deformation behaviour of stainless steel connections is different from that of carbon steel connections, with stainless steel exhibiting pronounced strain hardening. Both the bearing resistance and the locations of fracture initiation obtained from the numerical models match those observed during experimental studies of carbon steel and stainless steel connections. A parametric study to investigate the key parameters has been performed and the results utilised as the basis for design provisions for bearing failure in stainless steel bolted connections.
Del Savio AA, Nethercot DA, Vellasco PCGS, et al., 2009, Generalised component-based model for beam-to-column connections including axial versus moment interaction, JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol: 65, Pages: 1876-1895, ISSN: 0143-974X
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- Citations: 56
Queiroz FD, Queiroz G, Nethercot DA, 2009, Two-dimensional FE model for evaluation of composite beams, I: Formulation and validation, JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol: 65, Pages: 1055-1062, ISSN: 0143-974X
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- Citations: 18
Queiroz FD, Queiroz G, Nethercot DA, 2009, Two-dimensional FE model for evaluation of composite beams, II: Parametric study, JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol: 65, Pages: 1063-1074, ISSN: 0143-974X
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- Citations: 2
Stylianidis PM, Nethercot DA, Izzuddin BA, et al., 2009, Progressive Collapse: Failure Criteria Used in Engineering Analysis, ASCE Structures Congress’09: Don’t Mess with Structural Engineers
Izzuddin BA, Nethercot DA, 2009, Design-Oriented Approaches for Progressive Collapse Assessment: Load-Factor vs Ductility-Centred Methods, ASCE Structures Congress’09: Don’t Mess with Structural Engineers
Nethercot DA, Salih EL, Gardner L, 2009, BEHAVIOUR AND DESIGN OF STAINLESS STEEL BOLTED CONNECTIONS, 3rd International Forum on Advances in Structural Engineering, Publisher: CHINA ARCHITECTURE & BUILDING PRESS, Pages: 1-18
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- Citations: 2
Salih EL, Gardner L, Nethercot DA, 2009, Numerical study of bolted connections in stainless steel, 9th International Conference on Steel-Concrete Composite and Hybrid Structures, Publisher: RES PUBL SERV, Pages: 625-632
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- Citations: 1
Nethercot DA, Haidarali MR, 2009, EDGE STIFFENING FOR COLD FORMED MEMBERS, 9th International Conference on Steel-Concrete Composite and Hybrid Structures, Publisher: RES PUBL SERV, Pages: 3-13
Vlassis AG, Izzuddin BA, Elghazouli AY, et al., 2009, Progressive collapse of multi-storey buildings due to failed floor impact, Engineering Structures, Vol: 31, Pages: 1522-1534, ISSN: 0141-0296
Stylianidis P, Nethercot DA, 2009, Connection Modelling for Progressive Collapse Analysis, 9th International Conference on Steel-Concrete Composite and Hybrid Structures, Publisher: RES PUBL SERV, Pages: 575-580
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- Citations: 2
Ashraf M, Gardner L, Nethercot DA, 2008, Resistance of stainless steel CHS columns based on cross-section deformation capacity, Journal of Constructional Steel Research, Vol: 64, Pages: 962-970, ISSN: 0143-974X
A conceptually new structural design approach has recently been proposed by the authors to predict the resistance of stainless steel members subjected to various types of loading with cross-sections formed from thin flat plates including angles, channels, lipped channels, I-sections and rectangular hollow sections (RHS). The proposed method does not follow the traditional cross-section classification approach, which primarily relies on the assumption of a bilinear, elastic–perfectly-plastic material model. Instead, deformation capacity of a cross-section is determined directly from the local buckling characteristics of the constituent plate elements. This is then used to obtain the corresponding local buckling stress utilising an appropriate material model. This basic concept is extended herein to predict compression resistance of stainless steel columns with circular hollow sections (CHS). Available test and finite element (FE) results have been used to develop the basic design equation to predict the compression resistance of cross-sections and to propose column curves to determine flexural buckling resistances. The predicted resistances have been compared to those obtained using the current Eurocode; the predictions are significantly more accurate and more consistent than those given by the existing Eurocode.
Nethercot DA, 2008, Special issue: Imperial College Centenary - Foreword, JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol: 64, Pages: 927-927, ISSN: 0143-974X
Nethercot DA, 2008, Reliability, responsibility and reality in structural engineering, PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-STRUCTURES AND BUILDINGS, Vol: 161, Pages: 215-218, ISSN: 0965-0911
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- Citations: 6
Di Sarno L, Elnashai AS, Nethercot DA, 2008, Seismic response of stainless steel braced frames, International Colloquium on Stability and Ductility of Steel Structure, Publisher: ELSEVIER SCI LTD, Pages: 914-925, ISSN: 0143-974X
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- Citations: 29
Vlassis AG, Izzuddin BA, Elghazouli AY, et al., 2008, Progressive collapse of multi-storey buildings due to sudden column loss—Part II: Application, Engineering Structures, Vol: 30, Pages: 1424-1438
Izzuddin BA, Vlassis AG, Elghazouli AY, et al., 2008, Progressive collapse of multi-storey buildings due to sudden column loss — Part I: Simplified assessment framework, Engineering Structures, Vol: 30, Pages: 1308-1318
Ahmed B, Li TQ, Nethercot DA, 2008, Deflection of semi-rigidly connected beams, International Conference on Structures and Granular Solids - From Scientific Principles to Engineering Applications, Publisher: CRC PRESS-TAYLOR & FRANCIS GROUP, Pages: 293-303
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- Citations: 1
Izzuddin BA, Vlassis AG, Elghazouli AY, et al., 2007, Assessment of progressive collapse in multi-storey buildings, Structures and Buildings, Proceedings of the Institution of Civil Engineers, Vol: 160, Pages: 197-205
Ashraf M, Nethercot DA, Ahmed B, 2007, Sway of semi-rigid steel frames, part 2: Irregular frames, ENGINEERING STRUCTURES, Vol: 29, Pages: 1854-1863, ISSN: 0141-0296
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- Citations: 2
Queiroz FD, Vellasco PCGS, Nethercot DA, 2007, Finite element modelling of composite beams with full and partial shear connection, JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol: 63, Pages: 505-521, ISSN: 0143-974X
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- Citations: 119
Yassin AYM, Nethercot DA, 2007, Cross-sectional properties of complex composite beams, ENGINEERING STRUCTURES, Vol: 29, Pages: 195-212, ISSN: 0141-0296
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- Citations: 4
Nethercot DA, Izzuddin BA, Elghazouli AY, et al., 2007, Aligning Progressive Collapse with Conventional Structural Design, 5th International Conference on Advances in Steel Structures (ICASS’07)
Ashraf M, Gardner L, Nethercot DA, 2006, Finite element modelling of structural stainless steel cross-sections, Thin-Walled Structures, Vol: 44, Pages: 1048-1062, ISSN: 0263-8231
Stainless steel's characteristic nonlinear, rounded stress–strain behaviour requires accurate recognition in numerical modelling. Its response to cold-working is far more pronounced than that of ordinary carbon steel and hence appropriate modelling of the cold-worked corner regions is very important. Despite the importance of geometrical imperfections, their measurement is not a very common practice and assumed models are generally adopted in numerical investigations—often without proper verification. This paper investigates all important aspects for modelling stainless steel cross-sections through carefully designed parametric studies. Different cross-section types have been considered and the numerically obtained load–deformation responses have been compared with selected experimental results; the findings form the basis for specific guidelines. These proposals have been verified by application to all available stainless steel stub column tests obtained from different sources. The predicted numerical results have shown excellent agreement with those obtained experimentally.
Di Sarno L, Elnashai AS, Nethercot DA, 2006, Seismic retrofitting of framed structures with stainless steel, JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol: 62, Pages: 93-104, ISSN: 0143-974X
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- Citations: 35
Ashraf M, Gardner L, Nethercot DA, 2006, Compression strength of stainless steel cross-sections, Journal of Constructional Steel Research, Vol: 62, Pages: 105-115, ISSN: 0143-974X
A conceptually new approach which recognises the continuous nature of the stress–strain characteristic of stainless steel has recently been developed by the authors for the prediction of the strength of compressed plate elements in stainless steel members. This method does not use the classification system found in modern codes dealing with the structural design of carbon steel members. The original development was limited to plate elements supported on both longitudinal edges; the basic concept is expanded herein to cover a wider range of cases. The resulting design procedure forms part of a general treatment of stainless steel structural members that predicts resistances significantly in excess of those obtained from currently available design methods. These resistances are found to accord well with the observed strength of sections obtained in laboratory tests.
Nethercot DA, 2006, Improved Design of Stainless Steel Structural Members, London, ICMS 2006 - Steel: A new and traditional material for building, Publisher: Taylor and Francis, Pages: 45-54
Vlassis AG, Izzuddin BA, Elghazouli AY, et al., 2006, Design oriented approach for progressive collapse assessment of steel framed buildings, Structural Engineering International, Vol: 16, Pages: 129-136, ISSN: 1016-8664
Nethercot DA, 2006, Resolving complex behavioral issues in composite construction by appropriate numerical modelling, XI International Conference on metal structures, June 21-23, 2006, Rzeszow, Poland
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