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X-ORIGINAL-URL:https://www.fst.um.edu.mo
X-WR-CALDESC:Events for Faculty of Science and Technology | University of Macau
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DTSTART:20140101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Macau:20141104T100000
DTEND;TZID=Asia/Macau:20141104T110000
DTSTAMP:20260528T150832
CREATED:20141103T040034Z
LAST-MODIFIED:20251125T032021Z
UID:16357-1415095200-1415098800@www.fst.um.edu.mo
SUMMARY:A multi-scale approach for modeling the mechanical behavior of soils
DESCRIPTION:Speaker\nProf. Pierre-Yves HICHER\nProfessor of the Research Institute in Civil and Mechanical Engineering\nEcole Centrale de Nantes\, France \nAbstract\nIn this seminar\, Prof. Pierre-Yves Hicher will introduce A multi-scale approach for modeling the mechanical behavior of soils. The deformation of a representative volume of the material is generated by mobilizing particle contacts in all orientations. Thus\, the stress–strain relationship can be derived as an average of the mobilization behavior of these local contact planes. The local behavior is assumed to follow a Hertz–Mindlin’s elastic law and a Mohr–Coulomb’s plastic law. Essential features such as continuous displacement field\, inter-particle stiffness\, and fabric tensor are discussed. The predictions of the derived stress–strain model are compared to experimental results for sand under both drained and undrained triaxial loading conditions. The comparisons demonstrate the ability of this model to reproduce accurately the overall mechanical behavior of granular media and to account for the influence of key parameters such as void ratio and mean stress. The study of anisotropic specimens loaded in different directions shows the model capability of considering the influence of inherent anisotropy on the stress–strain response under a drained triaxial loading condition. \nBiography\nProfessor Pierre-Yves Hicher is currently a Professor of exceptional rank at the Research Institute in Civil and Mechanical Engineering\, Ecole Centrale de Nantes\, France. Professor Hicher worked in Ecole Centrale de Paris from 1974 to 1993. During this period\, he received PhD degree at Ecole Centrale de Paris in 1979\, and then promoted to assistant professor in 1981 and associate professor in 1983. He joined Ecole Centrale de Nantes as a full Professor in 1996. \nProfessor Hicher is the President of the Scientific Council of Ecole Centrale de Nantes. He is a member of the executive Council of the PGCE (Civil Engineering and Eco-construction Network)\, Chairman of the Granular Materials Committee of ASCE\, Associate Editor of the Journal of Engineering Mechanics (ASCE)\, Member of the editorial board of the European Journal of Environmental and Civil Engineering\, Expert for the Ministry of High Education and Research (AERES\, ANR\, PES). He is the reviewer for a number of international journals\, including J. Eng. Mechanics ASCE\, Eur. J. of Mechanics\, Int. J. Num. Anal. Methods in Geomechanics\, Geotechnique\, ASTM Geotechnical Testing J.\, Canadian Geot. J.\, Computers and Geotechnics\, European Journal of Environmental and Civil Engineering\, Granular Matter and J Aerospace Eng. Professor Hicher has published more than 60 international journal papers and 8 books. He has supervised more than 50 PhD students in the fields of soil mechanics\, foundation engineering\, granular materials\, constitutive modelling and numerical modeling.
URL:https://www.fst.um.edu.mo/event/a-multi-scale-approach-for-modeling-the-mechanical-behavior-of-soils/
LOCATION:E11-1038
CATEGORIES:cee_events
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BEGIN:VEVENT
DTSTART;TZID=Asia/Macau:20141127T143000
DTEND;TZID=Asia/Macau:20141127T153000
DTSTAMP:20260528T150832
CREATED:20141126T040000Z
LAST-MODIFIED:20251125T032021Z
UID:16360-1417098600-1417102200@www.fst.um.edu.mo
SUMMARY:Design of cold-formed steel back-to-back c-channel built-up columns using modified direct strength method
DESCRIPTION:Speaker\nProf. Hieng Ho LAU\nDeputy Dean and Associate Professor of School of Engineering & Science\nCurtin University Sarawak Campus\, Malaysia \nAbstract\nBack-to-back C-channels built-up compression members are popular in the construction industry particularly for spanning over large space area\, and carrying high loads while maintaining low self-weight. However\, current design standards do not provide comprehensive design guidelines for complex section such as back-to-back C-channels built-up section. There is little literature available for the design calculation of back-to-back C-channels built-up columns. Current design methods\, i.e. the Effective Width Method (EWM) and the Direct Strength Method (DSM) are unable to accommodate such complex section. Thus\, enhancement to these design methods is necessary to improve the design of back-to-back C-channels built-up columns. Therefore\, the Thickness Reduction Method (TReM) is proposed in this research to improve the current design methods for the back-to-back C-channels built-up column. Results from design calculations show that the proposed design method\, TReM\, is able to predict the capacity of the back-to-back C-channels built-up column well. Experimental investigation on the axially loaded cold-formed steel back-to-back C-channels built-up columns was carried out. A total of 66 specimens with two sizes of plain back-to-back C-channels built-up and lengths of 300mm\, 500mm\, 1000mm\, and 2000mm were tested. Compression tests were carried out on stub columns with flat end conditions\, whereas the short\, intermediate and slender columns were tested with pinned-end conditions. Experimental results show that restraint at the mid-length of the plain back-to-back C-channels built-up columns is critical regardless of the number of fasteners along the length of the built-up column. Whereas\, comparison of experimental results with results from design calculation using the proposed design method\, TReM\, shows good correlation. \nBiography\nAssociate Professor Lau Hieng Ho is currently Deputy Dean of School of Engineering & Science Curtin University Sarawak Campus\, Malaysia. Associate Professor Lau is attached to the Department of Civil &Construction Engineering in Curtin University Sarawak Campus and he was Head of the Department of Civil & Construction Engineering. Curtin University Sarawak Campus is the first off-shore university campus set up by Curtin University of Western Australia in partnership with the Sarawak State Government\, Malaysia. \nAssociate Professor Lau received his B.Eng and Ph.D. degrees from Oxford Brookes University\, United Kingdom in 1998\, and 2002 respectively. Prior to joining Curtin University Sarawak Campus back in February 2003\, he worked in the consulting industry. He is also a Professional Engineer (PEng)\, registered with Board of Engineers Malaysia. \nAssociate Professor Lau research interests include cold-formed steel structures\, design of steel structures\, structural stability and connections.
URL:https://www.fst.um.edu.mo/event/design-of-cold-formed-steel-back-to-back-c-channel-built-up-columns-using-modified-direct-strength-method/
LOCATION:E11-1041
CATEGORIES:cee_events
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