Dissertations / Theses: 'Structural Member'

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Lyon, Jesse W. "Second-order structural analysis with one element per member /." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd2837.pdf.

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Lyon, Jesse William. "Second-Order Structural Analysis with One Element per Member." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1756.

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In this thesis, formulas for the local tangent stiffness matrix of a plane frame member are derived by differentiating the member resistance vector in the displaced position. This approach facilitates an analysis using only one element per member. The formulas are checked by finite difference. The derivation leads to the familiar elastic and geometric stiffness matrices used by other authors plus an additional higher order geometric stiffness matrix. Contributions of each of the three sub-matrices to the tangent stiffness matrix are studied on both the member and structure levels through two numerical examples. These same examples are analyzed three different ways for comparison. First, the examples are analyzed using the method presented in this thesis. Second, they are analyzed with the finite element modeling software ABAQUS/CAE using only one element per member. Third, they are analyzed with ABAQUS using 200 elements per member. Comparisons are made assuming the ABAQUS analysis which uses 200 elements per member is the most accurate. The element presented in this thesis performs much better than the ABAQUS analysis which uses one element per member, with maximum errors of 1.0% and 40.8% respectively, for a cantilever column example. The maximum error for the two story frame example using the ABAQUS analysis with one element per member is 42.8%, while the results from the analysis using the element presented in this thesis are within 1.5%. Using the element presented in this thesis with only one element per member gives good and computationally efficient results for second-order analysis.

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Hewetson, C. G. "Object - oriented steel member design framework /." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/249.

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Kelly, Robert. "The influence of member orientation on hollow section joint strength." Thesis, University of Nottingham, 1998. http://eprints.nottingham.ac.uk/13287/.

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The influence of the member orientation on the strength of joints formed with square hollow sections is examined. The bird beak joint system is a relatively new truss arrangement for square hollow sections, where the chord and the brace have each been rotated by 45° about their own centreline axes. Based on previous experimental testing it has been suggested that this joint system leads to a stronger joint arrangement. Finite element analysis has been used to study the strength and behaviour of such bird beak joints and to compare them to similar joints in CHS and the traditional RHS configuration to test this claim. A comprehensive study has been undertaken for bird beak X -joints and T -joints and comparisons are made with similar traditional joints in RHS and CHS as the parameters of the width ratio ß, the chord slenderness ratio 2y and the chord length ratio a are varied. Displaced shape and contoured stress plots are included to aid understanding of the failure mechanisms. The finite element work on K -joints allows comparisons of the strength and stiffness of bird beak K -joints with those formed in the traditional RHS configuration as the boundary conditions (at the ends of the members), the brace angle and loading conditions are varied. A limited amount of experimental work has been carried out in the laboratories at Nottingham University, with some assistance from the author, involving the physical testing of bird beak joints so that the finite element models can be validated. This work is reported and examined critically. The conclusions focus on the claims that the bird beak joints are stronger and how they differ from the traditional form of joints. Equations are presented to extend the design information available for a practical parameter range.

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Scott, Joseph E. "Column Buckling Analysis of Wood Stud Members due to Reduced Stiffness over Partial Member Length." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1543325743355501.

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Uthaiah, Revathy Chottekalapanda. "Biochemical, structural and cellular studies on IIGP1, a member of the p47 family of GTPases." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=968745164.

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Lacy, Susan E. "A structural and functional analysis of cyclin interactions with the retinoblastoma protein family member P130." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0020/NQ30099.pdf.

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Henkel, William Joseph. "A Structural Equation of Leader-Member Exchange, Employee-Supervisor Relationship, Performance Appraisal, and Career Development." ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/4292.

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Some employees perceive that supervisors do not accurately reflect employees' performance or effectively differentiate among employees' performances during performance appraisals (PAs). Other employees believe the performance feedback they receive is not valuable for supporting their career development (CD). Employing leader-member exchange (LMX) theory and the distributive and interactional justice dimensions of organizational justice theory as the theoretical framework, this correlational study examined the relationships among LMX and employee-supervisor relationships (ESRs) and the relationships' influence on employees' CD through the mediating effect of employees' perceived efficacy of the PA process. Participants consisted of 44 defense contractor employees in the United States who completed a combination of 4 validated survey instruments (LMX-7, Interactional Justice, Appraisal System Satisfaction, Perceived Career Opportunity) and 1 demographic instrument. Results from the structural equation model, using partial least squares analysis, indicated significant (p < .001) positive relationships between the independent variables of LMX and ESR, the dependent mediating variable PA, and the dependent variable CD. The results indicated that a positive relationship between LMX and ESR will influence employees' CD through the mediating effect of employees' PAs. The implications for positive social change include the potential to improve communications between employees and supervisors, increase organizational performance by increasing employees' job satisfaction, potential benefiting career development for improving employees' families' quality of life, and contributions to the communities.

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Nishitani, Yuichi. "Structural studies of N-acetylglucosamine-phosphate mutase, a member of the α-D-phosphohexomutase superfamily." 京都大学 (Kyoto University), 2008. http://hdl.handle.net/2433/136914.

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Noseworthy, Dianne. "Depositional evolution and structural synthesis of the B marker (limestone) member, Whiterose formation, Jeanne d'Arc, offshore Newfoundland /." Internet access available to MUN users only, 2003. http://collections.mun.ca/u?/theses,61788.

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Hoell, Robert Craig. "Determinants of Union Member Attitudes Towards Employee Involvement Programs." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30741.

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This study investigates the role social information and personal dispositions play in the development of attitudes of unionized employees towards employee involvement programs. A theoretical model was developed in order to understand how social information and dispositions form union member attitudes towards employee involvement programs. This was designed from models of employee involvement and attitude formation. Data were collected from employees at electrical power generation facilities. Measures of organizational and union commitment, locus of control, participativeness, social information provided by the company, social information provided by the union, and employee involvement attitudes were gathered through a survey distributed at the facilities. General affect and satisfaction towards four types of employee involvement programs union members are most likely to encounter were measured. Specific hypotheses were developed in order to test and analyze parts of the theoretical model. While the results were at times contrary to the hypothesized relationships within the model, the data fit with the theorized model well enough to provide support for it. This model effectively demonstrated how employee involvement attitudes are formed from such data, and the relationships between the variables measured.
Ph. D.

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Sahin, Serkan. "A Comparative Study Of Aisc-360 And Eurocode 3 Strength Limit States." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610894/index.pdf.

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Nowadays
design, fabrication and erection of steel structures can be taken place at different locations as a result of rapid globalization
owners may require the use of widely accepted steel design codes. Therefore, engineers are faced with the challenge of being competent with several design specifications for a particular material type. AISC-360 and EC3 are widely accepted steel structure design specifications that utilize limit state principles with some similarities and differences in application. Hereby a study has been undertaken to put together the nominal strength expressions presented in both AISC-360 and EC3 codes in a single document, to identify the similarities and the differences in calculated strengths and to facilitate rapid learning of either of the specifications with prior knowledge of the other. Because of the wide scope of specifications, only fundamental failure modes are considered in this thesis. Resistance equations are directly compared with each other wherever possible. For cases where the treatment of specifications is entirely different, representative members were considered for comparison purposes.

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Ahmadi, Soma, and Oscar Bauer. "Predicting quality in leader-member exchange relations : The role of Impersonal Trust in predicting LMX-quality." Thesis, Linnéuniversitetet, Institutionen för organisation och entreprenörskap (OE), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-105879.

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The aim of this study is to test if the impersonal trust sub-constructs serve aspredictors of quality in LMX-relations. By performing structural equation modelingwith empirical data, a model was developed that optimally predicts quality in LMXrelations. A cross-sectional survey was designed in order to gather data fromemployees in Kalmar municipality (N=574) and was analyzed by Analysis ofMoment Structures (AMOS). The result suggests that the sub-construct of HRMpractices predicts quality in LMX-relations while simultaneously being regressed bythe sub-construct management of business and people and organizing theoperational activities. Additionally, the result indicates that the sub-constructmanagement of business and people correlate with other sub-constructssustainability, fair play and communication. This study indicates the importance ofHRM-practices, managerial capability and the organizing the operational activitiesin order to predict quality in LMX-relations by increasing the impersonal trust.

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Ostendorp, Markus. "Improved Methodology for Limit States Finite Element Analysis of Lattice Type Structures using Nonlinear Post-Buckling Member Performance." PDXScholar, 1992. https://pdxscholar.library.pdx.edu/open_access_etds/1179.

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In an attempt to achieve more efficient designs, the technological frontier is pushed further and further. Every year science probes for a better understanding of natural phenomena, discovering new and improved methods to perform the same task more efficiently and with better results. One of the new technologies is the nonlinear analysis of structural systems using inelastic post-buckling member performance. Inelastic post-buckling member performance is defined as the constitutive relationship between axial load and displacement after the ultimate member capacity has been exceeded. A nonlinear analysis is able to predict the failure behavior of a structural system under ultimate loads more accurately than the traditionally used linear elastic analysis. Consequently, designs can be improved and become more efficient, which reduces the realization cost of a project. An improved nonlinear analysis solution algorithm has been developed, that allows the analyst to perform a nonlinear analysis using post-buckling member performances faster than previously possible. Furthermore, the original post-buckling member performance database was expanded using results obtained from physical member compression tests. Based on the experimental results, new post-buckling member performance model curves were developed to be used together with the improved nonlinear solution algorithm. In addition, a program was developed that allows the analyst to perform a valid nonlinear analysis using a finite element program (LIMIT). The program combines a numerical pre-processor, and input and output data evaluation modules based on human expertise together with the LIMIT analysis package. Extensive on-line help facilities together with graphical pre- and post-processors were also integrated into the program. The resulting analysis package essentially combines all of the necessary components required to perform a nonlinear analysis using post-buckling member performances into one complete analysis package.

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Beighley-Kofoed, Melissa A. "Studies of the Distinguishing Features of NADPH:2-Ketopropyl-Coenzyme M Oxidoreductase/Carboxylase, an Atypical Member of the Disulfide/ Oxidoreductase Family of Enzymes." DigitalCommons@USU, 2011. https://digitalcommons.usu.edu/etd/1012.

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The metabolism of propylene in Xanthobacter autotrophicus occurs via epoxypropane formation and subsequent metabolism by a three-step, four-enzyme pathway, utilizing the atypical cofactor Coenzyme M (CoM) to form acetoacetate. The last step in the epoxide carboxylase pathway is catalyzed by a distinctive member of the disulfide oxidoreductase (DSOR) family of enzymes, NADPH:2-ketopropyl CoM oxidoreductase/carboxylase (2-KPCC). 2-KPCC catalyzes the unorthodox cleavage of a thioether bond and successive carboxylation of the substrate. The focus of the research presented in this dissertation aims to elucidate the details of 2-KPCC that allow it to perform chemistry unconventional for typical DSOR members. Sitedirected mutagenesis was used to mutate specific active site residues and to examine the catalytic properties of 2-KPCC upon these changes. Mutation of His137, the proximal histidine that directly coordinates the water molecule, eliminated essentially all redox-dependent activity of the enzyme while mutation of His84, the distal histidine that coordinates the water molecule through His137, diminished redoxdependent enzymatic activity to approximately 25% that of the wild type enzyme, confirming the respective roles of the histidine residues in stabilizing the enolate intermediate formed upon catalysis. Neither mutation of either histidine residue, nor mutation of either redox active cysteine residue had any negative effect on the rate of the redox-independent reaction catalyzed by 2-KPCC, the decarboxylation of acetoacetate. Mutation of Met140 resulted in an enzyme with drastically altered kinetic parameters and suggests Met140 plays a role in shielding the substrate from undesired electrostatic interactions with the surroundings. The inhibitory properties of the structural CoM analogs, 2- bromoethanesulfonate (BES) and 3-bromopropanesulfonate (BPS), were examined and exploited to provide further detail on the active site microenvironment of 2- KPCC. Modification by BES results in a charge transfer complex between the thiolate of Cys87 and the oxidized flavin. The spectral features of this charge transfer complex have allowed the determination of the pKa of the Cys87 to be significantly higher than the flavin thiol in other DSOR enzymes. BPS has been shown to be a competitive inhibitor of 2-KPCC with an inhibition constant over two orders of magnitude lower than for that of BES.

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Williams, R. M. "Structural and biochemical characterisation of the regulatory principles of twitchin kinase, a member of the titin-like family of muscle kinases." Thesis, University of Liverpool, 2016. http://livrepository.liverpool.ac.uk/3006993/.

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Firat, Fatih Kursat. "Development Of Load And Resistance Factors For Reinforced Concrete Structures In Turkey." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608888/index.pdf.

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In this dissertation, a study is conducted to develop a probability based load and resistance factor design criterion for structural members considering the local conditions of Turkey. The Advanced First Order Second Moment (AFOSM) procedure is utilized as the probabilistic method of analysis. Various sources of uncertainties associated with concrete compressive strength, yielding and ultimate strength of reinforcing steel bars and the dimensions of beams, columns and shear walls are analyzed and quantified. The resistance statistics for different failure modes of different types of reinforced concrete structural members are computed by using the resistance parameters within the framework of reliability analysis. Structural load effects of dead, live, wind, snow and earthquake loads are analyzed considering the uncertainties in these loads. For different load combinations, the safety levels corresponding to the current design practice are evaluated in terms of the reliability indexes for reinforced concrete beam, column and shear wall design in flexure and shear, and also column design in combined action of flexure and axial load. Depending on this evaluation and the reliability index values reported from other countries, target reliability indexes are selected for different load combinations and different failure modes of structural members. Finally, a new set of load and resistance factors corresponding to selected target reliabilities and levels of uncertainties are proposed for each different failure modes of the structural members considered in this study, separately.

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Isildak, Murat. "Use Of Helical Wire Core Truss Members In Space Structures." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610553/index.pdf.

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In an effort to achieve lighter and more economical space structures, a new patented steel composite member has been suggested and used in the construction of some steel roof structures. This special element has a sandwich construction composed of some strips of steel plates placed longitudinally along a helical wire core. The function of the helical core is to transfer the shear between the flange plates and increase the sectional inertia of the resulting composite member by keeping the flange plates at a desired distance from each other. Because of the lack of research, design engineers usually treat such elements as a solid member as if it has a full shear transfer between the flanges. However, a detailed analysis shows that this is not a valid assumption and leads to very unsafe results. In this context, the purpose of this study is to investigate the behavior of such members under axial compression and determine their effective sectional flexural rigidity by taking into account the shear deformations. This study applies an analytical investigation to a specific form of such elements with four flange plates placed symmetrically around a helical wire core. Five independent parameters of such a member are selected for this purpose. These are the spiral core and core wire diameters, the pitch of the spiral core, and the flange plate dimensions. Elements with varying combinations of the selected parameters are first analyzed in detail by finite element method, and some design charts are generated for the determination of the effective sectional properties to be used in the structural analysis and the buckling loads. For this purpose, an alternative closed-form approximate analytical solution is also suggested.

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Yang, Yang. "Stress intensity factors of circumferential semi-elliptical internal surface cracks of tubular member subjected to axial tensile loading." Thesis, University of Macau, 2010. http://umaclib3.umac.mo/record=b2182941.

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Vavassori, Stefano. "Structural and functional characterization of human ERp44 : a closer look at a member of PDI family regulating protein quality control in the early secretory pathway." Thesis, Open University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522107.

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Kneedy, Jason Lynn. "Stratigraphic and Structural Analysis of Coals in the Ferron Sandstone Member of the Mancos Shale and Fruitland Formation: Relationship to Coal Reservoir Permeability and Coalbed Methane Production." DigitalCommons@USU, 2005. https://digitalcommons.usu.edu/etd/6042.

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Coal reservoir quality in the Ferron Sandstone Member of the Mancos Shale, and in the Fruitland Formation is dependent on coal cleat characteristics. Coal reservoir permeability increases as a result of high cleat density. From careful outcrop examination, we were able to identify several factors that increase cleat density. Vitrain coal typically has the highest fracture density as a result of having well-developed face cleats and conchoidal fractures. Clarain coal contains face and butt cleats. Cleat density in clarain is also controlled by mechanical layer thickness. As mechanical layer thickness decreases, cleat density increases. Durain and fusain coals typically contain no welldeveloped cleat system, although their presence can affect mechanical layer thickness in adjacent coals, as they may form bounding units. Cleat density increases in the damage zone of faults and in the hinge-line of folds. Cleat-controlled reservoir permeability has beneficially affected methane production in one portion of the Drunkards Wash Gas Field, Utah, and appears to have negatively influenced methane production in the coalbed methane field.

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Trevino, April Anahi. "Fluvial Architecture and Reservoir Modeling Along the Strike Direction of the Trail Member of the Ericson Sandstone, Mesaverde Group in Southwest Wyoming." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8110.

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The Trail Member of the upper Cretaceous Ericson Sandstone, part of the Mesaverde Group, is exposed along hundreds of square kilometers through Wyoming along the flanks of several Laramide structural uplifts. This presents a unique opportunity to study the detailed architecture based on bed-scale heterogeneity and better assess the reservoir potential of these strata in outcrop exposure on a regional-scale, and to then relate these observations to producing fields nearby. The fluvial-dominated Trail Member formed as sediments traveled from the active Sevier thrust belt to the Cretaceous Interior Seaway, forming a basinward progradational clastic wedge along a relatively high gradient. The high energy, tectonically active setting led to preservation of sand-rich, often compositionally immature fluvial strata. Though there is an abundance of sand-rich strata in the Trail Member, production from this interval has been unpredictable in current and past fields such as the Trail Unit of southwestern Wyoming.Twelve detailed stratigraphic columns were described at three sites along the eastern flank of the Rock Springs Uplift to show facies heterogeneity beyond what is often available through wells, 69 hand samples were collected for determination of porosity and permeability, and photogrammetric characterization was performed at the three sites. Average porosity decreases along strike from north to south along with net-to-gross. The vertical changes in fluvial architecture within the Trail Member reflect changes in available accommodation. While thickness of the Trail Member is highly variable, ranging between 79 to 108 meters across the study area, there is an overall trend of thickening to the south. Although the character of the Trail strata changes appreciably along strike direction, this interval is consistently rich in sand, and grain size does not change drastically along the length of observed outcrops. This study demonstrated that spatial variability in the thickness, local accommodation, porosity, and net-to-gross of the Trail Member, as well as temporal variability in the amount and character of reservoir sands and channel stacking patterns play an important role in the unpredictability of this reservoir. This study will enable reservoir modeling and aid in future exploration projects within the Trail Member and other comparable systems with similar fluvial architecture and internal heterogeneity.

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Ali, Ahmad Ahmad. "Functional and structural insights into the periplasmic detection domain of GacS HK (GacSp) responsible for biofilm formation in Pseudomonas aeruginosa (Pa) and The study of a family 39 glycoside hydrolase member from Bacteroides cellulolisitycus wh2." Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4049.

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Pseudomonas aeruginosa (Pa) est une bactérie multi-résistante responsable de plus de 10% des infections nosocomiales en Europe. Pa réagit aux signaux environnementaux en activant un système de régulation complexe qui permet à la bactérie d’adopter une mode de vie planctonique (infection aigue) ou sessile (infection chronique caractérisée par la formation des biofilms). Le système à deux composants GacS/GacA joue un rôle central dans la permutation entre ces deux modes. Pendant une infection chronique, GacS HK forme des homodimeres permettant l’activation de la formation du biofilm. Nos travaux ont confirmé le rôle du domaine périplasmique de GacS HK (GacSp) dans la détection du signal et l’activation de la voie GacS/GacA. Malgré l’instabilité de GacSp, J’ai résolu la structure 3D de ce domaine par la spectroscopie RMN. GacSp adopte un repliement PDC qui caractérise un grand nombre de domaines senseurs connus pour fixer une large gamme de ligands. L’étude de la structure m’a permis de proposer un site de fixation du ligand. Les résultats présentés dans cette thèse montrent l’importance de GacSp et propose une nouvelle piste pour les études thérapeutiques visant à éradiquer le biofilm.La deuxième partie de ma thèse présente la structure cristalline du glycoside hydrolase 39 du B. cellulosilyticus WH2 présente dans le côlon (GH39wh2). GH39wh2 partage la même architecture avec les autres membres de la famille 39, cependant, elle possède un site actif plus large et plus exposé. Les analyses structurales et bioinformatiques ont permis d’attribuer GH39wh2 à un nouveau sous-groupe caractérisé par une fonction endoglycosidase inconnue
Pseudomonas aeruginosa (Pa) is a Multidrug-Resistant bacterium responsible for more than 10% of nosocomial infections in Europe. Interestingly, Pa can switch its lifestyle between planktonic (acute infection) and sessile lifestyle (biofilm-type chronic infection) through different regulatory pathways, in which GacS/GacA Two Component System (TCS) plays a central decisive role. An active homodimer form of GacS Histidine Kinase (HK) leads to biofilm formation, while the inhibition of GacS by the hybrid HK RetS via cytoplasmic hetero-dimerization promotes acute infection. During my thesis, we unveiled for the first time the sensing role of the periplasmic detection domain of GacS HK (GacSp). I further solved the 3D structure of GacSp using NMR spectroscopy revealing its PDC-like fold, which characterizes a large number of detection domains known to bind a wide range of ligands. The structural analyses of the new GacSp structure suggest a conserved ligand-binding pocket. All together, my results present structural and functional understanding of GacSp role, which form the basis to consider this domain as a new target for anti-biofilm therapy.In the second part of my thesis, I report a 2.5Å resolution crystal structure of a family 39 glycoside hydrolase member (GH39wh2) from the human gut bacteria B. cellulosilyticus WH2. GH39wh2 shares a similar architecture as found in other related GH39 members but unveils an atypical shallow solvent-exposed groove. Complementary biochemical and bioinformatics analyses assign GH39wh2 to a new GH39 subgroup harboring a yet unknown endoglycosidase activity

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Donovan, Michael James. "Structural characterisation and analysis of two plant lectins : Scilla campanulata fetuin-binding protein (2.8AÌŠ), a novel two-domain member of the monocot mannose-binding superfamily & the legume lectin Lens culinaris in multiple crystal forms and in co." Thesis, Liverpool John Moores University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439054.

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Kim, Yoon Duk. "Behavior and design of metal building frames using general prismatic and web-tapered steel I-section members." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33965.

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Metal building frames are typically designed using welded prismatic and web-tapered members with doubly-symmetric and/or singly-symmetric cross sections. Until recently, the base U.S. provisions for design of frames with web-tapered members were provided in the AISC ASD (1989) and LRFD (1999) Specifications. Unfortunately, these previous AISC provisions address only a small range of practical designs. As a result, metal building manufacturers have tended to develop their own methods for design of the wide range of nonprismatic member geometries and configurations encountered in practice. This research develops new design procedures for design of frames using general prismatic members and web-tapered members. An equivalent prismatic member concept utilized in prior research and the prior AISC provisions is generalized to accommodate the broad range of member types and configurations commonly used in metal building industry. Furthermore, the new design procedures incorporate many of the improvements achieved in the AISC (2005&2010) Specifications to metal building frame design. These improvements include a new stability design method, the direct analysis method, more complete considerations of different column buckling limit states (flexural, torsional and flexural-torsional buckling), and improved axial load and flexural resistance provisions. This research develops practical design-based procedures for simplified calculation of the elastic buckling resistances of prismatic and web-tapered members to facilitate the application of the proposed design methods. In addition, this research performs a relatively comprehensive assessment of beam lateral torsional buckling (LTB) behavior and strength of prismatic and web-tapered members using refined virtual test simulation. It is demonstrated that web-tapered members behave in a comparable fashion to prismatic members. Based on the virtual simulation study, recommendations for potential improvement of the AISC LTB resistance equations are provided. Lastly, the strength behavior of several representative metal building frames is studied in detail using the same virtual test simulation capabilities developed and applied for the assessment of the beam LTB resistances.

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Gardner, Christopher Andrew. "Ductility capacity of HPS70W net-section tensile members /." Diss., ON-CAMPUS Access For University of Minnesota, Twin Cities Click on "Connect to Digital Dissertations", 2001. http://www.lib.umn.edu/articles/proquest.phtml.

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Jiang, Chenguang. "Structural investigation of gelsolin superfamily members." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/40996.

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We expressed three recombinant proteins in E. coli and purified them for analysis. Human gelsolin fragment G2-G3 retains the ability of intact gelsolin to bind to and co-sediment with filamentous actin. Tryptophan fluorescence intensity from G2-G3 is Ca²⁺-sensitive, increasing with Ca²⁺ concentration in two steps, suggesting that the binding of Ca²⁺ at two sites induces a structural change that reduces the solvent exposure of tryptophan side chains. Iodide quenching studies of tryptophan fluorescence from the fragment indicate reduced effectiveness of the quencher when G2-G3 is in the presence of excess free Ca²⁺, consistent with the above conclusion. Screening of crystallization conditions for G2-G3 on its own and in complexes with actin yielded only small crystals of G2-G3 that did not diffract X-rays sufficiently well to yield structural information. Human CapG possesses three domains, C1-C3, that closely resemble the three N-terminal domains of gelsolin. We show CapG to exhibit both actin filament nucleation and severing activities in light scattering and total internal reflection fluorescence assays. Crystallization screens yielded crystals of CapG suitable for X-ray diffraction analysis, which resulted in a 1.5 Å resolution model for the C2-C3 fragment of CapG. The structure reveals a very different packing of C2-C3 in comparison to that observed previously in a mutant, CapG-sev, that had been engineered to resemble gelsolin G1 in portions of C1 and in the linking peptide between C1 and C2 [Zhang et al. (2006) EMBO J 25, 4458-4467]. We conclude that these structures represent analogues of the two different activated forms of the N-terminal half of gelsolin bound to actin [Wang (2008) Ph.D. thesis, UBC]. Finally, human villin-6M consists of villin domains V4-V6 without headpiece, which closely resemble gelsolin G4-G6. Screening of crystallization conditions produced crystals from which X-ray diffraction data generated a 1.9 Å resolution model for villin domain V6. Although grown by a different procedure, the crystals yielded a structure for V6 that is identical to that reported previously [Wang et al.,2009].

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Dancila, Dragos Stefan. "Energy-dissipating tensile composite members with progressive failure." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/12474.

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Li, Guzhao. "Bracing design requirements for inelastic members." Access restricted to users with UT Austin EID, 2002. http://www.lib.utexas.edu/etd/r/d/2002/guzhaol022/guzhaol022.pdf#page=4.

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Masse, Bruno. "Analysis of structural timber joints made with glass fibre/epoxy." Thesis, Coventry University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273732.

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Steffen, Robert Elliot. "Behavior and design of fiber-reinforced polymeric composite equal-leg single angle struts." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/19318.

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Abdel-Rahman, Nabil Mahmoud. "Cold-formed steel compression members with perforations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ30065.pdf.

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33

Warren, Alexander V. R. "Empirical shear assessment of reinforced concrete bridge members." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25876.

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34

Scott, R. H. "Tension stiffening effects in reinforced concrete members." Thesis, Durham University, 1985. http://etheses.dur.ac.uk/6803/.

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This thesis is in two parts which are related by the common theme of tension stiffening. Part I develops the concept of a stress-strain envelope to model the behaviour of the concrete in tension below the neutral axis of a reinforced concrete beam. This is substantiated by an analysis of the data from fourteen test beams. The envelope concept is then applied to the calculation of the moment-curvature relationships for these beams, which are also compared with the test results .Part II presents an experimental investigation of the longitudinal reinforcement strain distributions in reinforced concrete tension members. Test results for fourteen specimens having various cross-sections and reinforcement types are presented, with the reinforcement strains being measured by strain gauging the reinforcement internally. The comprehensive analysis of the test results includes specific design recommendations concerning bond stresses at working loads. Suggestions are made for further work.

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35

Rogers, John B. C. "Guided waves in thin-walled structural members." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0006/MQ41767.pdf.

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Tripi, Joseph Matthew 1975. "The applicability of advanced composite structural members." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80178.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1999.
Includes bibliographical references (leaves 62-63).
by Joseph Matthew Tripi.
M.Eng.

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37

Mohammed, Tesfaye A. "Reinforced Concrete Structural Members Under Impact Loading." University of Toledo / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1321650443.

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38

Oyawa, Walter Odhiambo. "STRUCTURAL RESPONSE OF FILLED STEEL COMPOSITE MEMBERS." Kyoto University, 2000. http://hdl.handle.net/2433/180943.

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Howells, Hugh Alan. "Collapse behaviour of space trusses with thin-walled members." Thesis, University of Surrey, 1985. http://epubs.surrey.ac.uk/1038/.

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40

Prihatmaji, Yulianto Purwono. "Investigation of "Joglo" Structure Damaged by Earthquake and Development of Technical Conservation Method for Damaged Structural Members." Kyoto University, 2013. http://hdl.handle.net/2433/175057.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(農学)
甲第17628号
農博第1990号
新制||農||1010(附属図書館)
学位論文||H25||N4749(農学部図書室)
30394
京都大学大学院農学研究科森林科学専攻
(主査)教授小松幸平, 准教授梅村研二, 教授中野隆人
学位規則第4条第1項該当

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41

Aoude, Hassan. "Structural behaviour of steel fibre reinforced concrete members." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=18676.

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A series of full-scale axial compression tests was conducted on RC and SFRC columns. The specimens, which were detailed with varying amounts of transverse reinforcement, were cast using a self-consolidating concrete (SCC) mix that contained various quantities of fibres. The results demonstrate that the addition of fibres leads to improvements in load carrying capacity and post-peak response. The results also show that the addition of steel fibres can partially substitute for the transverse reinforcement in RC columns, thereby improving constructability while achieving significant confinement. Analytical models for the prediction of the load-strain response of SFRC columns are presented and validated with the experimental results. The tensile behaviour of SFRC members reinforced with a single reinforcing bar was also studied. The results indicate that the addition of fibres leads to improvements in tension stiffening and crack control. A procedure for predicting the response of tension members, accounting for the presence of fibres, is presented. Experimental investigations were carried out on a series of RC and SFRC beams. The effects of steel fibres on shear capacity, failure mechanism and crack control are studied. The results show that the addition of steel fibres leads to improvements in load carrying capacity and can lead to a more ductile failure. A simple procedure that can be used to predict the ultimate shear capacity of SFRC beams is introduced and validated using results from other researchers.
Une série d'essais a été réalisée sur des poteaux de taille réelle soumis à des charges axiales. Les échantillons, qui avaient des quantités variables d'armature transversale, ont été construits en utilisant un béton auto-plaçant qui contenait une quantité variable de fibres métalliques. Les résultants de cette étude expérimentale démontrent que la présence des fibres influence positivement la capacité portante des poteaux. De plus, les résultats montrent que l'utilisation d'un béton renforcé de fibres métalliques (BFM) peut s'avérer une solution appropriée pour assurer une ductilité adéquate aux poteaux. L'auteur propose des modèles analytiques pour prédire le comportement de poteaux chargés uniaxialement. Le comportement sous tension d'éléments en BFM armés d'une seule barre a été étudié. Les résultats montrent que la présence de fibres améliore la résistance en tension. Une procédure pour la prédiction de la réponse des éléments soumis sous tension, prenant en compte la présence de fibres métalliques, est présentée. Des recherches expérimentales furent entreprises afin d'étudier le comportement de poutres sans étriers. L'influence de la présence de fibres sur le développement de fissures ainsi que les mécanismes de ductilité et de rupture est discutée. Les résultats montrent que l'ajout de fibres améliore la capacité portante et la ductilité des poutres. Une procédure est suggérée afin de déterminer la capacité portante de poutres construits avec BFM.

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42

Zhu, Jihua. "Behaviour and design of aluminum alloy structural members." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B37201888.

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Zhu, Jihua, and 朱繼華. "Behaviour and design of aluminum alloy structural members." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B37201888.

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44

Chon, Sok-Hyon 1974. "Structural applications and feasibility of prestressed steel members." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/84296.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2001.
Includes bibliographical references (leaves 46-47).
by Sok-Hyon Chon (a.k.a. Ken Tuttle)
M.Eng.

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45

McFall, Bruce Daniel. "An Adaptive Method of Joining Composite Structural Members." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1405435976.

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46

Corner, Quinten. "Torsional buckling and instability of steel structural members." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/5056.

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Law, Kwan Ho. "Instabilities in structural steel elliptical hollow section members." Thesis, Imperial College London, 2010. http://hdl.handle.net/10044/1/6205.

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Elliptical hollow sections (EHS) have been recently added to the family of hollow steel sections available to the construction industry. Their merits include different flexural rigidities about the two principal axes offering efficient bending resistance about the major axis and an aesthetically pleasant appearance. A number of recent practical applications have emerged, which are outlined in this thesis. Previous research on elliptical hollow sections has mainly focused on the cross-section level with a set of design rules for cross-section classification and shear resistance being proposed. The current study reviews the existing cross-section classification limits for both circular and elliptical tubular sections and investigates member instability of EHS in bending (lateral torsional buckling) and under combined axial compression and bending. Reliability analyses to establish a set of reliable design rules for elliptical hollow sections in the Eurocodes and other international structural design codes have been also performed. The key components of this research include laboratory testing, numerical modelling, and development of statistically verified design guidance. A series of experimental studies were undertaken to investigate the buckling response of elliptical hollow section members in bending and under combined axial load and bending. In total, 8 beams, 6 columns and 27 beam-columns were tested; the test results were then used to calibrate finite element models. Parametric studies were performed utilizing the validated numerical models. Based on the experimental and numerical findings, reliability analyses were undertaken to verify design rules for elliptical hollow sections. It is envisaged that these design rules will be incorporated into future revisions of Eurocode 3.

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48

Cooper, Tracy Lee. "Exploring a Disaster Management Network in the Caribbean: Structure, Member Relations, Member Roles, and Leadership Styles." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/77273.

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This study examined the dynamics of an inter-organizational national disaster management organization (NDO) in the Caribbean. It sought to provide a better understanding of network structure, functions, and member relations, which provided a foundation for understanding member roles and leadership styles. This dissertation's primary research question was: How do members participate in the national disaster management network in the Caribbean? In personal interviews, network members identified the NDO as a semi-open network system, incorporating both hierarchical and collaborative characteristics. This analysis argued the network constitutes a dynamic system that shifts its governance structure to adapt to circumstances confronted during the disaster management cycle. This study also found network structure affects member positions and those views reciprocally affect how the NDO is organized. One participant clearly claimed a central network position and served as "network broker," while several other members formed two high density groups within the NDO. Network members played a range of formal and informal roles in the collaboration, including coach and coordinator. The central NDO member played several primary roles: fundraiser, change agent, manager, and informer. This analysis also suggested leadership styles shaped the network's hybrid governance structure: some members employed a directive or delegative style, while others relied upon a participatory approach. This mix of styles underscored the importance of shared leadership in a disaster context. The Saint Lucia government has endeavored to engage citizens in disaster management planning through an extensive NDO committee structure. This study yielded insights into that decentralized decision-making structure and process. The NDO, as a public policy network, has served as a "new governance" form of government action. At the national level, non-governmental organizations have used the structure to work to frame disaster management issues, while citizens active at the grassroots levels have participated in the nation's disaster preparedness and response planning processes. This new governance mechanism may be deemed participatory but not yet representative democracy. Overall, however, Saint Lucia's networked and engaged approach to disaster response and mitigation has encouraged deeper mutual awareness of shared challenges among government units, participating third sector organizations, for-profit entities, and the nation's citizens.
Ph. D.

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49

Afshan, Sheida. "Structural behaviour of cold-formed stainless steel tubular members." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/23660.

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This thesis examines the behaviour of cold-formed stainless steel tubular structural members, with an emphasis on ferritic stainless steels. Owing to the high comparative expense of stainless steel relative to traditional carbon steel, this study aims to identify and develop means of utilising the material more efficiently. A comprehensive material test programme was carried out as part of an extensive study into the prediction of strength enhancements in cold-formed structural sections that arise during production. Material tests on a total of 51 flat coupons and 28 corner coupons, extracted from a total of 18 cross-sections formed from a wide range of materials, were performed. A new, simple and universal predictive model for harnessing the cold-formed induced strength enhancements was developed which offers, on average, 19% and 36% strength enhancements for the cross-section flat faces and corner regions, respectively, relative to the strength of the unformed material. Ferritic stainless steels, having no or very low nickel content, offer a more viable alternative for structural applications to the more commonly used austenitic stainless steels, reducing both the level and variability of the initial material cost. There is currently limited information available on the structural performance of this type of stainless steel. Therefore, to overcome this limitation, a series of material, cross-section and member tests have been performed on two ferritic grades - EN 1.4003 and EN 1.4509. The experimental results were used to assess the applicability of the current codified design provisions to ferritic stainless steel structural components. Moreover, the elevated temperature performance of ferritic stainless steels, covering the material response and the flexural buckling behaviour, was investigated through analysis of experimental and numerical results, leading to proposals for suitable design recommendations. Finally, simplifications and refinements to the recently developed continuous strength method (CSM) were made. Comparison of the predicted capacities with over 140 collected test results on stainless steel stub columns and cross-sections in bending shows that the CSM offers improved accuracy and reduced scatter relative to the current design methods. The reliability of the approach has been demonstrated by statistical analyses, enabling its use in structural design standards.

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Indiyono, Paulus. "Hydrodynamic loading due to appurtenances on offshore structural members." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.307828.

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Dissertations / Theses on the topic 'Structural Member'

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