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Dissertations / Theses on the topic 'Bridal creeper'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Siderov, Kris, and kris siderov@rmit edu au. "An investigation of the invasion dynamics of Asparagus asparagoides at the habitat level using spatial analytical techniques." RMIT University. Mathematical and Geospatial Sciences, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20061010.095929.

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This thesis reports on research that examines the early stage invasion process of Asparagus asparagoides (L.) W. Wight (bridal creeper), primarily a bird-dispersed weed, in a remnant vegetation patch. The study site is on Phillip Island, approximately 100 kilometres south east of Melbourne, Victoria. Asparagus asparagoides invasion of the remnant vegetation reserve is a relatively recent phenomenon. Landscape elements that affect bird dispersal and vegetation types that affect seedling establishment may be important factors that limit or enhance the spread of A. asparagoides. A s
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2

Garas, Yanni Victor Youssef. "Multi-scale investigation of tensile creep of ultra-high performance concrete for bridge applications." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31689.

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Thesis (Ph.D)--Civil and Environmental Engineering, Georgia Institute of Technology, 2010.<br>Committee Co-Chair: Kimberly Kurtis; Committee Co-Chair: Lawrence Kahn; Committee Member: Arun Gokhale; Committee Member: James Lai; Committee Member: T. Russell Gentry. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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3

Lindley, Seth Michael. "Investigation of the Time-Dependent Longitudinal Flexural Behavior of the Varina-Enon Bridge." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/92799.

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Post-tensioned concrete is a building technology which provides a compressive force to concrete via steel tendons. This combination of steel and concrete allows for the construction of lighter and stiffer structures. Post-tensioned concrete is widely utilized throughout the United States highway system and bridge construction. Over time, the force in the prestressing strands is reduced by delayed strains in the concrete. The accurate estimation of this prestress loss is vital for making good decisions about the remaining capacity of a structure and the infrastructure system at large. The Va
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4

Hinkle, Stephen Dock. "Investigation of Time-Dependent Deflection in Long Span, High Strength, Prestressed Concrete Bridge Beams." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34740.

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Accurate camber prediction in prestressed concrete bridge beams is important to all parties involved in bridge design and construction. Many current prestress loss prediction methods, necessary for proper camber calculation, were developed many years ago and are predicated on assumptions that may no longer be valid as higher strength concrete, wider beam spacing, and longer span lengths become more commonplace. This throws into question which models are appropriate for use in camber calculation by the bridge engineers and contractors of today. Twenty-seven high-strength concrete mo
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5

Nelson, Douglas A. "Investigation of Concrete Mixtures to Reduce Differential Shrinkage Cracking in Composite Bridges." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/24425.

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The objective of the research presented in this thesis was to develop a concrete bridge deck topping mixture that resists the effects of differential shrinkage by decreasing shrinkage and increasing creep. . In addition, the amount of tensile creep that concrete experiences under long-term tensile stresses were quantified and compared to compressive creep values in order to gain a better understanding of how concrete behaves under tension. Test results show that the amount of tensile creep exceeded compressive creep by a factor of 2-5. Various shrinkage and creep models were compared against
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6

Dahiya, Ankuj. "Long-Term Monitoring and Evaluation of the Varina-Enon Bridge." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/102891.

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To make sound decisions about the remaining life of a structure, the precise calculation of the prestress losses is very important. In post-tensioned structures, the prestress losses due to creep and shrinkage can cause serviceability issues and can reduce flexural capacity. The Varina-Enon Bridge is a cable-stayed, precast, segmental, post-tensioned box girder bridge located in Richmond, Virginia. Observation of flexural cracks in the bridge by inspectors promoted a study regarding long-term prestress losses in the structure. For understanding and sustaining the structure throughout its remai
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7

Kasera, Sudarshan Chakradhari. "Simulation of the effect of deck cracking due to creep and shrinkage in single span precast/prestressed concrete bridges." University of Cincinnati / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1416233864.

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8

Brodsky, Rachel Amanda. "Effective Prestress Evaluation of the Varina-Enon Bridge Using a Long-Term Monitoring System and Finite Element Model." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99398.

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The Varina-Enon Bridge is a cable-stayed, precast, segmental, post-tensioned box girder bridge located in Richmond, Virginia. Inspectors noticed flexural cracking in July of 2012 that prompted concerns regarding long-term prestress losses in the structure. Prestress losses could impact the future performance, serviceability, and flexural strength of the bridge. Accurately quantifying prestress losses is critical for understanding and maintaining the structure during its remaining service life. Long-term prestress losses are estimated in the Varina-Enon Bridge using two methods. The first util
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9

Dostálová, Darina. "Částicové kompozity v konstrukčních detailech obvodových plášťů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-390260.

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Due to a European energy concept for reducing energy consumption and also the concept of sustainable development, there is a growing demand for reduced energy consumption during the operation of the building and hence increasing demands on the thermal and mechanical properties of the building envelope. For this reason, it is necessary to look for materials that could meet both thermal and mechanical properties, as well as mechanical resistance and loadability, especially for the application for the foundations of the house, the base of the house and for application to structural details for el
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10

Yang, Xiong. "Use of Fiber Reinforced Polymer Composite Cable for Post-tensioning Application." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2259.

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Corrosion of steel tendons is a major problem for post-tensioned concrete, especially because corrosion of the steel strands is often hard to detect inside grouted ducts. Non-metallic tendons can serve as an alternative material to steel for post-tensioning applications. Carbon fiber reinforced polymer (CFRP), given its higher strength and elastic modulus, as well as excellent durability and fatigue strength, is the most practical option for post-tensioning applications. The primary objective of this research project was to assess the feasibility of the use of innovative carbon fiber reinforce
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11

Catai, Evandro. "Análise dos efeitos da retração e fluência em vigas mistas." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-25042006-083551/.

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Foram realizados estudos das ações e suas combinações, que possam ocorrer nas pontes; também foram apresentados as principais características das pontes em vigas mistas e os tabuleiros utilizados, os conectores de cisalhamento que são utilizados na ligação aço/concreto e os efeitos da retração e fluência das vigas mistas. No estudo desses efeitos realizou-se uma análise elástica; a seção transversal foi considerada idealizada e as tensões atuantes na seção mista foram obtidas através do método das tensões admissíveis. Este procedimento foi baseado por Djuric (1963) posteriormente por Mason (19
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12

Nani, Pavel. "Most nad potokem Bystrice." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227167.

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The subject of my diploma thesis is a detailed static calculation of the post-tensioned concrete road bridge across Bystrica creek near Banska Bystrica in Slovakia. The bridge is element of turning ramp a motorway R1. The spatial curvature continuous bridge has 9 fields. It was made a spatial curvature computational model of the bridge for a structural analysis. The model was comparison with a straight computational model of the bridge. It is made comparison effect of the construction bridge in stages on the size of the internal forces too. The load-bearing structure was checked according to C
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13

Gallardo, Méndez José Manuel. "Model of strain-related prestress losses in pretensioned simply supported bridge girders." Thesis, 2014. http://hdl.handle.net/2152/24900.

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Prestressed concrete construction relies on the application of compressive stresses to concrete elements. The prestressing force is typically applied through the tensioning of strands that react against the concrete and induce compression in the concrete. Loss of prestress is the decrease of this pre-applied stress. The conservative estimation of the prestress losses is imperative to prevent undesired cracking of the prestressed element under service loads. A large fraction of the prestress losses is a consequence of concrete deformations. This fraction of the losses can be identified as stra
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14

Shih, Cing-Lan, and 石靖嵐. "The Effect of Shrinkage and Creep in The Connection of New and Old Bridge." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/90968350675578301735.

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碩士<br>國立交通大學<br>土木工程系所<br>94<br>In this thesis , the stresses in connected slab , which is occurred by the differential shrinkage and creep, was investigated between new constructed and old bridge. A finite element model is established by Diana, a commercial finite element program, to explore the effect of stress in the connection slab for different environment and time after new bridge was built .The results of FE-analysis show that the shear stress is maximum at two end of the joint .Delaying the time to joint the new and old bridge and joint it at higher humidity and lower temperature will
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15

Pesek, Phillip Wayne. "Temperature, stress, and strength development of early-age bridge deck concrete." Thesis, 2011. http://hdl.handle.net/2152/ETD-UT-2011-08-4270.

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In bridge deck concrete, early-age cracking can lead to substantial serviceability and structural integrity issues over the lifespan of the bridge. An understanding of the temperature, stress, and strength development of concrete can aid determining the early-age cracking susceptibility. This project, funded by the Texas Department of Transportation, evaluated these properties for various bridge deck materials and mixture proportions. The research presented in this thesis involved a laboratory testing program that used a combination of semi-adiabatic calorimetry, rigid cracking frame, fre
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16

Yousefpoursadatmahalleh, Hossein. "Short-term and time-dependent stresses in precast network arches." Thesis, 2015. http://hdl.handle.net/2152/31351.

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Due to their structural efficiency and architectural elegance, concrete arches have long been used in bridge applications. However, the construction of concrete arches requires significant temporary supporting structures, which prevent their widespread use in modern bridges. A relatively new form of arch bridges is the network arch, in which a dense arrangement of inclined hangers is used. Network arches are subjected to considerably smaller bending moments and deflections than traditional arches and are therefore suitable for modern, accelerated construction methods in which the arches are fa
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