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Rozprawy doktorskie na temat „Beam stiffness”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Ahmed, Ishtiaque. "Semi-rigid action in steel frames." Thesis, University of Sheffield, 1992. http://etheses.whiterose.ac.uk/3025/.

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2

Andersson, Patrik. "Finite Element and Dynamic Stiffness Analysis of Concrete Beam-Plate Junctions." Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-198509.

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Measurements and predictions of railway-induced vibrations are becoming a necessity in today’s society where land scarcity causes buildings to be put close to railway traffic. The short distances mean an increased risk of the indoor vibration and noise disturbances experienced by residents. In short, the scope of the project is to investigate the transmission loss and vibration level decrease across various junction geometries. The junctions are modelled in both the Finite Element Method (FEM) and the Dynamic Stiffness Method (DSM). Resonances are avoided when possible by using semi-infinite b

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3

Muthirevula, Neeharika. "Cross-Sectional Stiffness Properties of Complex Drone Wings." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/73988.

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The main purpose of this thesis is to develop a beam element in order to model the wing of a drone, made of composite materials. The proposed model consists of the framework for the structural design and analysis of long slender beam like structures, e.g., wings, wind turbine blades, and helicopter rotor blades, etc. The main feature consists of the addition of the coupling between axial and bending with torsional effects that may arise when using composite materials and the coupling stemming from the inhomogeneity in cross-sections of any arbitrary geometry. This type of modeling approach all

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4

Melandri, Giovanni. "Study of a novel solution to obtain controllable stiffness for beam-like elements." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amslaurea.unibo.it/20196/.

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La presente tesi tratta dello studio di concetti volti all'ottenimento di strutture meccaniche a rigidezza variabile per applicazioni in ambito di ricerca scientifica, in particolare per una futura applicazione in un robot aereo ad ala battente, al fine di studiare l'interazione tra ala elastica ed aria. Vengono riassunti i metodi per ottenere rigidezza variabile ed, in seguito ad una fase di confronto basato su requisiti ed obiettivi di progetto, vengono scelte due soluzioni. Il lavoro mostra che il concetto "sliding segments" funziona bene per una trave composta da un'asta interna ed un tu

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Schniepp, Timothy John. "Design Manual Development for a Hybrid, FRP Double-Web Beam and Characterization of Shear Stiffness in FRP Composite Beams." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/34550.

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Fiber-reinforced polymeric (FRP) composites are being considered for structural members in bridge construction as lighter, more durable alternatives to steel and concrete. Extensive testing and analysis of a pultruded, hybrid double web beam (DWB) developed for use in bridge construction has been conducted at Virginia Tech. A primary purpose of this testing is the development of a structural design guide for the DWB, which includes stiffness and strength data. The design manual also includes design allowables determined through a statistical analysis of test data. Static testing of the beam

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6

K, C. Ashim. "SLAB AND TRANSVERSE BEAM STIFFNESS EFFECT ON THE SEISMIC DESIGN OF MOMENT FRAME STRUCTURE." OpenSIUC, 2021. https://opensiuc.lib.siu.edu/theses/2817.

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Structures experience a dynamic nature of the load, different from ordinary design loads during earthquake excitation. The response of the structure to earthquake loads depends on the properties of its structural as well as non-structural components. The objective of this study is to examine the effect of the slab and transverse beams on the dynamic response of the structure using the seismic design provisions of the latest building design codes. Structural analysis and design (Staad.Pro) software is used in this study to perform seismic analysis of four building models having identical sectio

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7

Espinosa, Diego Alejandro. "Moment-dependent pseudo-rigid-body models for beam deflection and stiffness kinematics and elasticity." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0002943.

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8

Hayes, Michael David. "Structural Analysis of a Pultruded Composite Beam: Shear Stiffness Determination and Strength and Fatigue Life Predictions." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11066.

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This dissertation is focused on understanding the performance of a particular fiber-reinforced polymeric composite structural beam, a 91.4 cm (36 inch) deep pultruded double-web beam (DWB) designed for bridge construction. Part 1 focuses on calculating the Timoshenko shear stiffness of the DWB and understanding what factors may introduce error in the experimental measurement of the quantity for this and other sections. Laminated beam theory and finite element analysis (FEA) were used to estimate the shear stiffness. Several references in the literature have hypothesized an increase in the e

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9

Gupta, Sayan. "Vibration Analysis Of Structures Built Up Of Randomly Inhomogeneous Curved And Straight Beams Using Stochastic Dynamic Stiffness Matrix Method." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/224.

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Uncertainties in load and system properties play a significant role in reliability analysis of vibrating structural systems. The subject of random vibrations has evolved over the last few decades to deal with uncertainties in external loads. A well developed body of literature now exists which documents the status of this subject. Studies on the influence of system property uncertainties on reliability of vibrating structures is, however, of more recent origin. Currently, the problem of dynamic response characterization of systems with parameter uncertainties has emerged as a subject of inte

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10

Gupta, Sayan. "Vibration Analysis Of Structures Built Up Of Randomly Inhomogeneous Curved And Straight Beams Using Stochastic Dynamic Stiffness Matrix Method." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/224.

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Uncertainties in load and system properties play a significant role in reliability analysis of vibrating structural systems. The subject of random vibrations has evolved over the last few decades to deal with uncertainties in external loads. A well developed body of literature now exists which documents the status of this subject. Studies on the influence of system property uncertainties on reliability of vibrating structures is, however, of more recent origin. Currently, the problem of dynamic response characterization of systems with parameter uncertainties has emerged as a subject of inte

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11

Vootukuri, Venkat Ramana Reddy. "COMPARISON OF STRENGTH, DUCTILITY AND STIFFNESS FOR RADIUS CUT AND STRAIGHT CUT OF REDUCED BEAM SECTION." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2536.

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In 1994 there was an earthquake occurred in Northridge, California which caused damage in structures built with Steel Moment Frames (SMF) due to the brittle fractures in the beam and column connections. It has led to the major modifications and improvements in the connection detailing prior to the earthquake occurred in the Northbridge. These changes came up with better materials for welding and introduced the use of cover plate and Reduced Beam Section (RBS). RBS connections are the most widely used connection today and it allows the SMF systems to yield extensively and deform plastically by

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12

Rydström, Sara. "Regularization of Parameter Problems for Dynamic Beam Models." Licentiate thesis, Växjö University, School of Mathematics and Systems Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-7367.

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<p>The field of inverse problems is an area in applied mathematics that is of great importance in several scientific and industrial applications. Since an inverse problem is typically founded on non-linear and ill-posed models it is a very difficult problem to solve. To find a regularized solution it is crucial to have <em>a priori</em> information about the solution. Therefore, general theories are not sufficient considering new applications.</p><p>In this thesis we consider the inverse problem to determine the beam bending stiffness from measurements of the transverse dynamic displacement. O

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13

Yang, Jie. "Structural behaviour of concrete-filled elliptical column to I-beam connections." Thesis, University of Bradford, 2017. http://hdl.handle.net/10454/16022.

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Concrete-filled tubular (CFT) columns have been widely adopted in building structures owing to their superior structural performance, such as enhanced load bearing capacity, compared to hollow tubes. Circular, square and rectangular hollow sections are most commonly used in the past few decades. Elliptical hollow section (EHS) available recently is regarded as a new cross-section for the CFT columns due to its attractive appearance, optional orientation either on major axis or minor axis and improved structural efficiency. The state of the research in terms of elliptical columns, tubular joint

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14

Hu, Ruiqi. "A Variable Stiffness Robotic Arm Design Using Linear Actuated Compliant Parallel Guided Mechanism." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1511796200603533.

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15

Assenso, Antwi Akwasi. "LOCATION AND CONFIGURATION OF REDUCED BEAM SECTION CONNECTION EFFECTS ON STRENGTH, STIFFNESS AND DUCTILITY OF MOMENT STEEL FRAMES." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1532.

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Moment resistant frames are mainly used in resisting lateral loads in buildings. During the 1994 Northridge Earthquake, some of these moment steel frame connections could not undergo inelastic deformation which led to many structural damages. New connection systems were proposed and tested which performed better than the pre-Northridge moment frame connections. Reduced beam section (RBS) connection is one of the most widely used connections after the Northridge Earthquake. Instead of increasing the steel at beam-column, the RBS connection rather removed steel from the flange of the beam. This

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16

Dolieba, Marius. "Sijos, sudarytos iš dviejų medžiagų, stiprumo ir standumo tyrimas." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2007. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2007~D_20070816_163500-44372.

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Šiuo metu medžiagų poreikis gamybai yra labai išaugęs.Todėl inžinieriai stengiasi atrasti vis naujų arba tobulesnių medžiagų. Daugiasluoksnės konstrukcijos įgauna vis didesnę paklausą, dėl savo savikainos ir pritaikymo galimybės.Naudojant šias medžiagas galima gauti norimas masės ir stiprumo konstrukcijas. Daugiasluoksniams konstrukciniams elementams gaminti naudojamos tokios medžiagos kaip:stiklo, boro, plastiko pluoštai ir t.t. Mes išanalizavome 6 metrų sijas iš dviejų medžiagų. Mes analizavome skirtingus skerspjūvius ir skirtingus sluoksnių storius, paskaičiavome skerspjūvių stiprumą ir sta

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17

Poudel, Sanchit. "EFFECTS OF CONCRETE SLAB ON THE DUCTILITY, STRENGTH AND STIFFNESS OF STEEL MOMENT FRAMES WITH REDUCED BEAM SECTION CONNECTIONS." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1798.

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It was not thought that there would be some major flaws in the design of widely used steel moment frames until the Northridge Earthquake hit the California on January 17, 1994. Until then, steel moment frames were practiced as the most ductile system and were used in buildings from few stories to skyscrapers. The heavy devastation from Northridge Earthquake was an alarm for all the people related to the design and construction of such structures and pushed everybody to act fast to find some possible solutions to such never-expected-problems. Following the earthquake, FEMA entered into a cooper

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18

Banks, Alan James. "Effects of rear bumper beam deletion on the perception of steering performance of commercial vehicles." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14405.

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In order to remain competitive in the marketplace, all motor vehicle manufacturers face difficult decisions with regard to balancing cost vs. feature. That is to say that the manufacturer must balance the cost of the product to the customer to remain competitive whilst offering appropriate technology and standard features required by that customer. All motor manufacturers are therefore under pressure to keep costs of nonfeature items to a minimum. One of the cost reductions items prevalent on most vehicles is the deletion of the structural member that attaches the rear bumper, known as the bum

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Banks, Alan J. "Effects of Rear Bumper Beam Deletion on the Perception of Steering Performance of Commercial Vehicles." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14405.

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In order to remain competitive in the marketplace, all motor vehicle manufacturers face difficult decisions with regard to balancing cost vs. feature. That is to say that the manufacturer must balance the cost of the product to the customer to remain competitive whilst offering appropriate technology and standard features required by that customer. All motor manufacturers are therefore under pressure to keep costs of nonfeature items to a minimum. One of the cost reductions items prevalent on most vehicles is the deletion of the structural member that attaches the rear bumper, known as

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20

Tryon, Joshua Edwin. "Simple Models for Estimating the Rotational Stiffness of Steel Column-to-Footing Connections." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/5822.

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Despite the crucial role they play in transferring loads from the superstructure to the foundation, steel column-to-footing connections have received little attention in research. Though shallow embedded connections are typically characterized as pinned, studies have shown that they exhibit significant rotational stiffness. The objective of this thesis is to quantify the rotational stiffness of such connections. A method named the continuum model is developed by which the rotational stiffness of embedded connections may be calculated. Outputs from this model are compared with experimental data

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21

Mensah, Frederick Ayisi. "Comparison of Strength, Stiffness and Ductility of Reduced Beam Section Subjected to Lateral Loads Only and Combined Gravity And Lateral Loads." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2434.

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Lateral loads from Northridge Earthquake in 1994 caused brittle fractures at column-beam connections in rigid frame structures which hitherto were thought to have high ductility to resist such brittle fractures. These brittle fractures were caused by the moment frame connections’ inability to undergo inelastic deformation which eventually resulted in several structural damages. Reduced beam section (RBS) connection was among one of the solutions proposed by researchers following the Northridge Earthquake. In RBS connections, part of the beam flanges or web at a distance from the face of the c

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22

Bower, Owen J. "Analytical Investigation into the Effect of Axial Restraint on the Stiffness and Ductility of Diagonally Reinforced Concrete Coupling Beams." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1211065883.

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23

Noll, Scott A. "Dynamic Interactions Between Multidimensional Viscoelastic Joints and an Elastic Frame Structure." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1364809438.

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24

Ondák, Lukáš. "Alternativní rám Formule Student vyhovující požadavkům mezinárodních pravidel." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231356.

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This master thesis describes design of frame construction of Formula Student car. The objective was to reduce weight and increase the torsional stiffness against to last version of the car. Next objective was to prove advantages of alternative frame. This had been achieved by gradual transformation of standard design of frame to alternative with the usage of FSAE alternative frame rules. The weight was reduced by 20% and torsional stiffness was increased by 34% thanks to FEM simulation and sophisticated changes of alternative frame design.

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25

Крутась, Ю. С., та Д. С. Микиша. "Влияние жесткости дополнительной опоры в статически неопределимой балке при ударной нагрузке". Thesis, Сумский государственный университет, 2014. http://essuir.sumdu.edu.ua/handle/123456789/40237.

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Рассматривается статически неопределимая консольная балка, конец которой опирается на пружину с заданной жесткостью. Для раскрытия ее статической неопределимости используется метод сил, когда за основную систему принимается балка, левый конец который заделан, а правый свободен.

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26

Herman, Tomáš. "Identifikace klopné tuhosti nápravy automobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378016.

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This diploma thesis deals with roll stiffness of twist beam axle. There are described experi-mental and analytic methods of measuring, its applications and comparison on a particular type of axle. There is also construction plan of system usable for this measuring.

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27

Yazgan, Ufuk. "A Methodology For Determination Of Performance Based Design Parameters." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/4/1120682/index.pdf.

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Establishment of relationships for predicting the lateral drift demands of near-fault ground motions is one of the major challenges in earthquake engineering. Excessive lateral drifts caused by earthquake ground motions are the major causes of structural damage observed in structures. In this study, some of the fundamental characteristics of near-fault ground motions are examined. Response characteristics of elastic frame structures to near-fault ground motions are investigated. An approximate method for estimating the elastic ground story and interstory drifts for regular frame type structure

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28

Souza, Abner Soares de. "Comportamento de elementos pré-moldados de concreto com ligações semi-rígidas." Universidade Federal de São Carlos, 2006. https://repositorio.ufscar.br/handle/ufscar/4606.

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Made available in DSpace on 2016-06-02T20:09:04Z (GMT). No. of bitstreams: 1 DissASS.pdf: 3030488 bytes, checksum: a4d23b016b1767d42942fdad295c0fe1 (MD5) Previous issue date: 2006-09-01<br>Universidade Federal de Minas Gerais<br>The behaviour of reinforced concrete precast beams is strongly influenced by the flexural stiffness of its beam-column connections, wherein there is interdependence between the nonlinearity of the moment-curvature relationship along the beam and the non-linearity of the moment-rotation relationship of the beam-column connections. In most of the existing researches on

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29

Geara, Fadi. "Contribution à l'étude de la torsion des poutres en voiles minces et des poutres à profil dissymétrique." Châtenay-Malabry, Ecole centrale de Paris, 1998. http://www.theses.fr/1998ECAP0598.

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Cette recherche est une contribution à l'étude de la torsion des poutres en voiles minces ouverts et des poutres à sections transversales non symétriques. En effet, dans le cas des poutres en voiles minces ouverts, on a développé la statique de la torsion suivant la théorie de Vlassov, c'est-à-dire en tenant compte du gauchissement qui accompagne en général la torsion, et ses effets sur les éléments de structure. Notre travail commence par la résolution de l'équation différentielle de la torsion gênée pour diverses conditions aux limites et différents chargements. Des exemples numériques ont c

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30

Catoia, Bruna. "Comportamento de vigas protendidas pré-moldadas com ligações semi-rígidas." Universidade Federal de São Carlos, 2007. https://repositorio.ufscar.br/handle/ufscar/4612.

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Made available in DSpace on 2016-06-02T20:09:05Z (GMT). No. of bitstreams: 1 DissBC.pdf: 11069989 bytes, checksum: b3c92f78ccad794ee5c2bb5f907f4814 (MD5) Previous issue date: 2007-02-28<br>Universidade Federal de Minas Gerais<br>The behaviour of prestressed precast beams is directly affected by the rotational stiffness of the end connections. Although the prestressed beam presents a linear behaviour in service, the effective behaviour of the precast beam depends on the interaction of the beam with the behaviour of its connections. The majority of the experimental investigations on semi-rigid

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31

Yoo, Jiyoun. "Modeling Compressive Stress Distributions at the Interface between a Pallet Deck and Distribution Packaging." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/39939.

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Three components, a pallet, packaging, and material handling equipment, of the unit load portion of the supply chain are physically and mechanically interacting during product storage and shipping. Understanding the interactions between two primary components, a pallet and packaging, in a unit load is a key step towards supply chain cost reduction and workplace safety improvement. Designing a unit load without considering physical and mechanical interactions, between those two components, can result in human injury or death caused from a unsafe workplace environment and increased supply chain

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32

Pereira, Daniel Henrique Fidelis. "Análise do comportamento estrutural de ligações em aço entre viga de seção I e pilar de seção tubular circular." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-11122013-101943/.

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Esta pesquisa consiste de uma investigação acerca do comportamento estrutural de ligações entre viga de seção I e pilar de seção tubular circular em situações de pilar de canto e de pilar solicitado por quatro vigas simultaneamente (pilar central). A associação entre a viga de seção I e o pilar de seção tubular circular remete à análise de ligações com comportamento complexo. A partir da análise numérica, via Método dos Elementos Finitos com os softwares ANSYS® e TrueGrid® foi avaliado o comportamento momento-rotação e parâmetros como resistência, rigidez inicial e ductilidade das ligações. Fo

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33

Araújo, Tássio Jorge Figueiredo de. "Estudo da ligação viga-pilar em sistema estrutural de concreto considerando a variação da semi-rigidez por meio de parâmetros geométricos da ligação." Universidade Federal de Alagoas, 2013. http://www.repositorio.ufal.br/handle/riufal/3500.

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This work presents a study to quantify the influence of geometrical and stiffness parameters on the behavior of beam-column concrete connections. Therefore, linear elastic models are designed by using three-dimensional finite elements in the commercial software Abaqus. These models serve as a reference for the optimization of geometrical and rigidity parameters of reticulated models, which are commonly used in structural projects. The results confirm some tendencies of influence by parameters already reported in the literature, such as variations in stiffness caused by eccentricity and width v

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34

Kataoka, Marcela Novischi. "Estudo da continuidade em ligações laje-viga-pilar em estruturas pré-moldadas de concreto." Universidade Federal de São Carlos, 2007. https://repositorio.ufscar.br/handle/ufscar/4610.

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Made available in DSpace on 2016-06-02T20:09:05Z (GMT). No. of bitstreams: 1 DissMNK.pdf: 4268420 bytes, checksum: 50c2feaa3b1252323d08d023d64588ae (MD5) Previous issue date: 2007-02-26<br>Universidade Federal de Minas Gerais<br>The present research deals with the study of continuity in slab-beam-column connections in precast concrete structures, wherein an experimental investigation about the contribution of longitudinal reinforced bars, passing on the side of the column in the top of the slab, on the connector flexural stiffness. For this study, a beam-to-column connection was selected

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35

Basim, Weaam, Khader Nour Abdul, and Vijan Rehsid. "Beteende hos laminerade glasbalkar med och utan sprickor." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-97934.

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Det blir allt vanligare att använda laminerat glas som ett konstruktionsmaterial. Men glas är ett känsligt och genomskinligt material som kan ge en obehaglig känsla om det spricker. Särskilt om det handlar sig om en glaskonstruktion som ska hålla en stor del av en byggnad. En glaskonstruktion bör upplevas trygg att vistas i. Idag är det svårt att ersätta bärande konstruktionsdelar med glas i Sverige eftersom det inte finns några särskilda dimensioneringsregler för glas. I det här examensarbetet genomförs en undersökning om hur laminerat glas böjer sig när det utsätts för belastning och varier

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36

Balázs, Ivan. "Klopení tenkostěnných ocelových nosníků s vazbami vybočení z roviny ohybu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-371784.

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The doctoral thesis focuses on problem of stability of steel thin-walled beams with lateral and torsional restraints along the spans. Theoretical background of lateral-torsional buckling of an ideal beam with and without restraints preventing out-of-plane buckling is briefly described. In the following chapters the problem of stabilization of steel thin-walled beams by planar members is dealt with. The state of the art in this field is summarized and some open questions are identified. The research in this field could bring new findings about actual behavior of these structural systems. The ra

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Black, Thomas Andrew. "Spectral Element Analysis of Bars, Beams, and Levy Plates." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/33260.

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This thesis is primarily concerned with the development and coding of a Levy-type spectral plate element to analyze the harmonic response of simply supported plates in the mid to high frequency range. The development includes the governing PDE, displacement field, shape function, and dynamic stiffness matrix. A two DOF spectral Love bar element and both a four DOF spectral Euler-Bernoulli and a four DOF spectral Timoshenko beam element are also developed to gain insight into the performance of spectral elements. A cantilever beam example is used to show how incorporating eigenfunctions

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Black, T. Andrew. "Spectral Element Analysis of Bars, Beams, and Levy Plates." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/33260.

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This thesis is primarily concerned with the development and coding of a Levy-type spectral plate element to analyze the harmonic response of simply supported plates in the mid to high frequency range. The development includes the governing PDE, displacement field, shape function, and dynamic stiffness matrix. A two DOF spectral Love bar element and both a four DOF spectral Euler-Bernoulli and a four DOF spectral Timoshenko beam element are also developed to gain insight into the performance of spectral elements. A cantilever beam example is used to show how incorporating eigenfunctions

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Harrison, Christopher. "The detection of delaminations in vibrating composite beams." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.323574.

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Xiao, Jane. "Effects of Corrugations on Stiffness Properties of Composite Beams for Structural Applications." DigitalCommons@CalPoly, 2019. https://digitalcommons.calpoly.edu/theses/2049.

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Composites have high strength-to-weight ratios, which is particularly desired for applications with weight restrictions. Common composite materials such as carbon fiber reinforced plastic (CF) and fiber glass reinforced plastic (FG) were used in this research. While composite materials possess high stiffness and strength properties, the stiffness of composite laminates may be maximized by changing the geometry. By adding corrugations, the flexural stiffness is increased in one direction compared to the stiffness of a flat part with the same amount of material. Thus, stiffness increases without

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Santos, Júlia Borges dos. "Análise da influência da rigidez das ligações viga-pilar no comportamento estrutural de edifícios de múltiplos pavimentos em concreto armado." Universidade Federal de Uberlândia, 2016. https://repositorio.ufu.br/handle/123456789/14230.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Conventional structural analysis of buildings in reinforced concrete is performed considering beam-column connections as rigid. However, experimental results prove the existence of relative rotations in beam-column connections of reinforced concrete structures, showing the partial transfer of bending moment. In this study the influence of the stiffness of beam-column connections on the structural behavior of multi-storey buildings in reinforced concrete was investigated. On a first stage, the value of the rotation restriction of co

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Gioux, Gaël 1974. "Effect of properties of metallic foams on stiffness and strength of sandwich beams." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/85270.

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Boggs, Thomas P. "Determination of axial load and support stiffness of continuous beams by vibration analysis." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-11102009-020304/.

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Mirza, Muhammad Bilal. "COMPARISON OF STRENGTH, DUCTILITY AND STIFFNES OF REDUCED BEAM SECTION AND WELDED FLANGE PLATE CONNECTION." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1547.

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The earthquake of Northridge, CA in 1994 caused damages in steel moment frame buildings due to the brittle fractures in beam to column connections. This led to the modifications and improvements in the connection detailing used prior to the Northbridge earthquake. These improvements included use of better welding material and process, use of cover plates (such as Welded Flange Plate connections (WFP)), Reduced Beam Section (RBS) etc. RBS and WFP connections are the two most widely used connection configuration today. Both RBS and WFP connections allow the steel moment frame systems to extens

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Amany, Aya Nicole Marie. "Characterization of shear and bending stiffness for optimizing shape and material of lightweight beams." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112553.

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Optimized slender and short-thick beams are used in building, aircraft and machine structures to increase performance at a lower material cost. A previous work proposes an optimum shape, material and size selection model to design lightweight slender beams under pure bending. In short-thick beams, the transverse shear effects are no longer negligible and impact the choice of the optimum shape. This work extends such an optimum selection model to consider both slender and short-thick beams, by formulating the total beam stiffness design requirement as a combination of shear and bending stiffnes

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Schottler, Robert. "Java Applets for Analysis of Trusses, Beams and Frames." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/9966.

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Java applets are developed to assist in the learning of basic structural analysis concepts. In order for these programs to be easily available over the Internet, they are written in the object-oriented Java programming language. The Java programs known as applets are embedded in HTML documents. The HTML documents, part of a series of instructional units, present the topics demonstrated by the applets. The applets include truss and frame determinacy applets; a three-hinged arch bridge applet; determinate and indeterminate truss analysis applets; determinate and indeterminate frame analysis appl

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Eyre, Kyle J. "Moisture absorption and stiffness degradation of carbon fiber reinforced polymer composite specimens exposed to accelerated environmental aging conditions." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1313919681&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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Tigeli, Mojabeng. "Effects of structural repair and strengthening on stiffness and ultimate capacity of corrosion-damaged RC beams." Master's thesis, University of Cape Town, 2010. http://hdl.handle.net/11427/4997.

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Includes abstract.<br>Includes bibliographical references (leaves 91-96).<br>Over the years, the need for repair of reinforced concrete (RC) structures has increased significantly, both for old and new structures. The main cause of structural damage in RC structures is corrosion of reinforcement. Therefore there is a need to understand the effects of corrosion damage on the structural properties of RC members such as stiffness and ultimate capacity in order to develop improved and effective repair strategies that will minimise the risk of further damage and structural failure both in the short

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Hu, Ye. "Lateral Torsional Buckling of Wooden Beams with Mid-Span Lateral Bracing." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35076.

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An analytical and numerical investigation is conducted for the lateral torsional buckling analysis of wooden beam with a mid-span lateral brace subjected to symmetrically distributed loading. Two models are developed; one for the case of a rigid brace and another one for the case of a flexible brace. The analytical solutions are based on the principle of stationary potential energy and a Fourier expansion of the buckling displacement fields and bending moments. The validity of both models are verified against 3D finite element analyses in ABAQUS. Where applicable, verifications were also condu

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Babamohammadi, Sajjad. "Mechanical Assessment of Fiber Reinforced Composite Hollow Circular Beams." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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This thesis presents a study on fiber reinforced hollow beams. The theoretical background is based on published works and some extensions to the present researches. For some, simple, cases exact solutions are made available, however hollow composite beams have to be studied using 3D modeling in order to capture their actual anisotropic behavior. At first, we start to investigate if we have enough information to successfully design a structure using FRP materials. Then after studying some published works in this field, we understood that there is a lack of some important details. We tried to

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