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Object-oriented steel connection design frameworkWillemse, G. E. (Grant Erin) 12 1900 (has links)
Thesis (MScEng)--University of Stellenbosch, 2004. / ENGLISH ABSTRACT: Connections are a vitally important part of any structural framework. Thisstatement may seem
obvious, yet it is surprisinghow often insufficient attention is given to the design of this essential
aspect of steelwork projects.
This thesis concentrates on developing a specification for designing steel connections with the
main emphasis on the practical and economical design of typical connections. The design
methods of the specification are developed according to the new South African design code
which is currently in draft form, namely SANS10162:Code of Practice for the Structural Use of Steel:
Part 1: Limit States Design of hot-rolled steelwork - 2002.
An object-oriented framework and associated graphical user interface for designing the
connections are developed and implemented. The primary objectives of the implemented
framework are:
• Being generic in the sensethat it allows for easy addition of additional connection types,
• To implement the design paradigm of the South African code, without fixing specific
parameter values programmatically in the implementation and
• To build on an existing architecture that allows for structural analysis,structural steel member
design and distributed collaboration in the design process. / AFRIKAANSE OPSOMMING: Verbindings vorm In uiters belangrike deel van enige staal struktuur. Alhoewel hierdie stelling dalk
vanselfsprekend mag wees, is dit egter verbasend hoe selde voldoende aandag aan die ontwerp
van hierdie essensiëleaspek van staalwerk projekte gegee word.
Hierdie tesis konsentreer op die ontwikkeling van In spesifikasievir die ontwerp van staal verbindings
met die oog op praktiese en ekonomiese ontwerp van tipiese verbindings. Hierdie
ontwerpmetodes isgebasseer op die nuwe Suid Afrikaanse ontwerpkode wat tans in proef-vorm is,
naamlik SANS 10162: Gebruikskode vir Stoa/bouwerk: Dee/I: Grenstoestandontwerp vir
warmgewa/ste staa/werk - 2002.
In Objek orienteerde raamwerk en In geassosieerde grafiese gebruikerskoppelvlak word ontwikkel
en geimplimenteer. Die primêre mikpunte van hierdie geimplimenteerde raamwerk is:
• Om generies te wees in die sin dat dit die byvoeging van addisionele verbinding tipes
toelaat,
• Om die paradigma van die Suid Afrikaanse kode te implimenteer sonder om enige waardes
van spesifieke parameters programmaties vas te lê, en
• Om dit op In bestaande argitektuur te bou wat strukturele analise, strukturele ontwerp en
verspreide samewerking in die ontwerpproses toelaat.
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Behaviour of cold-formed-steel-framed walls and floors in standard fire resistance tests /Alfawakhiri, Farid, January 1900 (has links)
Thesis (Ph. D.)--Carleton University, 2002. / Includes bibliographical references (p. 263-286). Also available in electronic format on the Internet.
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Investigation of retrofit techniques for seismic resistant steel moment connections /Civjan, Scott Adam, January 1998 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 1998. / Vita. Includes bibliographical references (leaves 476-484). Available also in a digital version from Dissertation Abstracts.
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Shear wall tests and finite element analysis of cold-formed steel structural membersVora, Hitesh. Yu, Cheng, January 2008 (has links)
Thesis (M.S.)--University of North Texas, Dec., 2008. / Title from title page display. Includes bibliographical references.
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Critical evaluation of seismic design criteria for steel buildingsLefki, Lkhider January 1987 (has links)
No description available.
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Performance of snug tight bolts in moment end-plate connectionsKline, Donald Paul 09 May 2009 (has links)
An experimental investigation was conducted to study the behavior of snug tight ASTM A325 bolts in moment end-plate connections for use in single story buildings. Wind loading was deemed to be the critical loading on snug tight bolt, moment end-plate connections. A test loading sequence was established based on a statistical analysis of the 50-year wind loading on low rise buildings. Eleven specimens, representing six end-plate configurations, were tested under cyclic loading covering expected wind loads in the range of 33 to 100 percent of the connection design (allowable stress design) moment. Following the cyclic loading, the specimens were statically loaded to failure, and the experimental strengths were compared with predicted strengths for connections with fully tightened A325 bolts. Additionally, the effect of snug tight bolts on connection stiffness are considered. Finally, recommendations for the use of snug tight bolts in moment end-plate connections were provided. / Master of Science
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The effect of moment-rotation joint behaviour on the displacements of portal framesAlbertyn, Heindrich Louw 12 1900 (has links)
Thesis (MScEng)--Stellenbosch University, 2011. / ENGLISH ABSTRACT: Higher grade steels are being rolled in South Africa by suppliers and results in structural members having an
increased axial and bending moment capacity due to an increased yield stress. Structural elements used in
designs are stronger and therefore lighter sections with sufficient axial and bending moment capacity are used.
Displacements of structural elements are calculated using the stiffness and Young’s modulus of a profile. These
values are not affected by the increased yield stress in higher steel grades and therefore have a negative effect
on the displacements of the structure. The potential of these higher grade structural elements are not utilized
through serviceability limit state criteria, since the displacement determination does not account for the increased
capacities of higher grade steels, but only stiffness and elasticity of the members.
Structural analysis of portal frames does not account for the real behaviour of steel connections and column
bases. It is assumed that connections and bases are either fully rigid or perfectly pinned. This assumption
is used in the analysis and design of the structure. Although it is assumed that connections and bases are either
rigid or pinned, the real behaviour is in between these two extremes. Rigid connections exhibit a certain flexibility
under loading whereas pinned bases provide a certain restraint under loading. The real behaviour of connections
and bases are referred to as the moment-rotation behaviour of the connection. For a certain applied moment to
the connection or base, the connection exhibits a certain rotation.
The focus of this study is placed on the accuracy and feasibility of modelling the real behaviour of connections
and bases in a structural analysis of a portal frame. A connection stiffness is determined from the
connection’s moment-rotation behaviour, and is assigned to a rotational spring of zero length in a structural
analysis. An experimental investigation was conducted to obtain the real displacement data of a portal frame
subject to loads for two different support conditions, i.e. a perfect hinge and grouted-support. A perfect hinge
support was used to isolate the moment-rotation response of the ridge and eaves connection. The experimental
results were used to compared to the results obtained from a structural analysis to determine the accuracy of the
numerical results.
A real design case was investigated with load combinations imposed on the frame in accordance with
SANS 10160:2011. Three methods of modelling connections and bases in an analysis were considered. Firstly
modelling connections as rigid and bases as pinned, secondly modelling connections as linear rotational springs and
bases as pinned. Lastly was to model connections as linear rotational springs and bases as non-linear rotational
springs. The outcome of the research was that more accurate displacements of a portal frame could be obtained
by modelling the real behaviour of rigid connections as rotational springs, but this is not the case with grouted
column bases. It is thus not feasible to model the real behaviour of connections and bases in a structural analysis
as the current method of modelling connections as rigid and bases as pinned provides reliable and accurate
displacement results. / AFRIKAANSE OPSOMMING: Hoë graad staal word tans in Suid Afrika gerol deur verskaffers en lei daartoe dat strukturele elemente oor ’n
groter aksiale- en buigmomentkapasiteit het as gevolg van ’n groter vloeispanning. Strukturele elemente in
ontwerpe is sterker en gevolglik het ligter elemente die benodigde aksiale- en buigmoment-kapasiteit. Verplasings
van strukturele elemente word bepaal vanaf die styfheid en Young modulus van die element. Hierdie waardes word
nie beïnvloed deur die groter vloeispanning van hoë graad staal nie, en het dus ’n negatiewe uitwerking op die
verplasings van die struktuur. Die potensiaal van die gebruik van hoë graad staal word nie benut in die geval van
voldoening aan diensbaarheids kriterium nie, aangesien verplasings bepaal word vanaf die styfheid en elastisiteit
van die elemente, en nie vloeispanning nie.
Strukturele analise van portaalrame neem nie die ware gedrag van konneksies en kolomvoetstukke in ag
nie. Die aanname word gemaak in analises en ontwerpe dat konneksies en voetstukke óf rigied óf geskarnierd is.
Hierdie is slegs ’n aanname en in die werklikheid lê die ware gedrag van konneksies en voetstukke tussen hierdie
grense. Rigiede konneksies toon ’n sekere buigbaarheid tydens belasting en geskarnierde voetstukke toon ’n sekere
beperking teen rotasies. Die ware gedrag van konneksies en voetstukke word gedefinieer as moment-rotasie
gedrag. Vir ’n spesifieke aangewende moment, ondergaan die konneksie of voetstuk ’n sekere rotasie.
Hierdie studie fokus op die akkuraatheid en uitvoerbaarheid van die modellering van die ware gedrag van
konneksies en voetstukke in ’n strukturele analise van portaalrame. Die styfheid van ’n konneksie word bepaal
vanaf sy unieke moment-rotasie gedrag, en word ingevoer as ’n styfheid van ’n rotasieveer in ’n strukturele analise.
’n Eksperimentele ondersoek was gedoen om verplasingswaardes van ’n portaalraam onder belastings te bepaal.
Twee ondersteunings is ondersoek in die eksperimentele program, naamlik ’n geskarnierde ondersteuning asook ’n
breivul ondersteuning. Die gebruik van die geskarnierde ondersteuning isoleer die moment-rotasie gedrag van die
nok en dakrand konneksies. Die eksperimentele resultate was gebruik om die akkuraatheid van die resultate vanaf
die strukturele analise te ondersoek.
Laastens was ’n ontwerpsprobleem ondersoek deur laskombinasies, soos bepaal volgens die riglyne van
SANS 10160:2011, op ’n portaalraam aan te wend. Drie gevalle van modellering van konneksies in ’n strukturele
analise is ondersoek. Eerstens om konneksies as rigied en voetstukke as geskarnierd te beskou. Tweedens was die
konneksies as linieêre rotasievere gemodelleer en voetstukke as geskarnierd te beskou. Laastens was om konneksies
as linieêre rotasievere te modeleer en voetstukke as nie-linieêre rotasievere. Die navorsing het getoon dat meer
akkurate verplasings van portaalrame bepaal kan word deur rigiede konneksies te modelleer as rotasievere, maar
dit is nie die geval met breivul ondersteunings nie. Die gevolg is dat die uitvoerbaarheid van die modellering van
konneksies en voetstukke as rotasievere nie effektief is nie, aangesien die huidige metode van die modellering van
konneksies as rigied en voetstukke as geskarnierd akkurate en betroubare resultate lewer.
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A critical evaluation of concrete and steel frame buildings in Hong Kong with regard to waste minimizationShiu, Kwai-king, Joe., 蕭桂瓊. January 2005 (has links)
published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management
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Merkezi ve dışmerkezi güçlendirilmiş çelik uzay çerçevelerin sismik performansı /Çelik, İlyas Devran. Ay, Zeki. January 2008 (has links) (PDF)
Tez (Yüksek Lisans) - Süleyman Demirel Üniversitesi, Fen Bilimleri Enstitüsü, İnşaat Mühendisliği Anabilim Dalı, 2008. / Bibliyografya var.
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Development of a system architecture and applications for an integrated computer software system for the analysis and design of steel structures.Raby, Douglas Allan, January 1999 (has links)
Thesis (M. Eng.)--Carleton University, 1999. / Also available in electronic format on the Internet.
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