Relevant bibliographies by topics / Bridal creeper

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Bridal creeper'

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

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Journal articles on the topic "Bridal creeper"

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Turner, Peter J., John K. Scott, and Helen Spafford. "Bridal Creeper (Asparagus asparagoides)–Invaded Sites with Elevated Levels of Available Soil Nutrients: Barrier to Restoration?" Invasive Plant Science and Management 4, no. 2 (April 2011): 212–22. http://dx.doi.org/10.1614/ipsm-d-10-00032.1.

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AbstractBridal creeper has become a serious environmental weed in southern Australia. Historically the invaded areas had low soil nutrient levels. However, our field surveys indicate that soils in bridal creeper–invaded areas have higher phosphorus and iron levels than soils in nearby native reference areas regardless of the proximity to agriculture or other disturbances. A glasshouse experiment was undertaken to determine the influence of increased nutrients on plants that co-occur with bridal creeper in order to (1) assess the impact of changed soil conditions and (2) predict the response of dominant species following the biological control of bridal creeper. The relative growth rate (RGR) of bridal creeper, two native shrubs (narrow-leaved thomasia [Thomasia angustifolia] and bluebell creeper [Billardiera heterophylla]), and an invasive exotic grass (annual veldt grass [Ehrharta longiflora]) were determined in three soil types: soil collected within a bridal creeper stand, soil collected from a nearby reference area, and a potting mix with nutrient levels higher than that recorded in the field. The plant species were chosen due to their association with bridal creeper. For example, the native species narrow-leaved thomasia was identified in a previous survey as the most abundant shrub at the invaded site where the soil was collected. The two other species, bluebell creeper and annual veldt grass, were identified from a previous seedbank trial as being abundant (in the seedbank) and able to readily germinate in invaded areas. When grown in either the bridal creeper–invaded soil or reference soil, bluebell creeper had significantly lower RGRs than narrow-leaved thomasia and annual veldt grass. However, as all these species showed increases in RGRs between reference soil and bridal creeper soil, this study indicates that for at least these three species the impact of increased nutrients may not be a barrier to the recovery of invaded areas following the control of bridal creeper.
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Harman, H. M., N. W. Waipara, C. J. Winks, L. A. Smith, P. G. Peterson, and J. P. Wilkie. "Natural enemies of bridal creeper Asparagus asparagoides in New Zealand." New Zealand Plant Protection 61 (August 1, 2008): 362–67. http://dx.doi.org/10.30843/nzpp.2008.61.6884.

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Bridal creeper is a weed of natural and productive areas in the northern North Island of New Zealand A classical biocontrol programme was initiated in 20052007 with a survey of invertebrate fauna and pathogens associated with the weed in New Zealand Although bridal creeper was attacked by a wide range of generalist invertebrates their overall damage affected
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Waipara, N. W., E. H. C. McKenzie, H. M. Harman, C. J. Winks, and D. Park. "First record of bridal creeper rust,Puccinia myrsiphylli, a classical biocontrol agent of the environmental weed bridal creeper,Asparagus asparagoides, in New Zealand." Australasian Plant Disease Notes 1, no. 1 (2006): 23. http://dx.doi.org/10.1071/dn06010.

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Morin, Louise, and Penelope B. Edwards. "Selection of biological control agents for bridal creeper: a retrospective review." Australian Journal of Entomology 45, no. 4 (November 2006): 287–91. http://dx.doi.org/10.1111/j.1440-6055.2006.00552.x.

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Harman, H. M., N. W. Waipara, C. J. Winks, L. A. Smith, P. G. Peterson, A. Jones, and J. Stanley. "Distribution of bridal creeper rust (Puccinia myrsiphyllii) In New Zealand." New Zealand Plant Protection 60 (August 1, 2007): 320. http://dx.doi.org/10.30843/nzpp.2007.60.4667.

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Jusaitis, Manfred. "Herbicidal control of bridal creeper (Asparagus asparagoides) in an ecologically sensitive environment." Pacific Conservation Biology 24, no. 1 (2018): 3. http://dx.doi.org/10.1071/pc17010.

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Asparagus asparagoides (bridal creeper) is a highly invasive noxious environmental weed in southern Australia. It poses a severe threat to biodiversity and conservation in temperate natural ecosystems. Pterostylis arenicola, a threatened terrestrial orchid endemic to South Australia, is directly imperilled by this weed in most of its remnant populations. The coincident growth phenologies of orchid and weed make for an ecologically sensitive environment when considering methods of weed control or eradication. To minimise impact on the orchid and its ecosystem, this paper examines the efficacy of herbicide application for A. asparagoides control using the weed wiping technique, comparing it to the conventional spray application method. The most prolonged control of A. asparagoides was achieved after a single wipe-application of 1.5 g a.i. (active ingredient) L−1 metsulfuron methyl, either alone or in combination with 120 g a.i. L−1 glyphosate, both treatments giving significantly better weed control five years after treatment than comparable spray applications. An investigation of the effect of glyphosate on cultures of the mycorrhizal fungus isolated from P. arenicola indicated a significant decline in mycelial growth with increasing herbicide concentration over the range 0.5–3.0 kg a.i. ha−1. These results provide further incentive for the use of ecologically sensitive herbicide application techniques, such as weed wiping, in areas of high conservation concern.
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Stansbury, C. D. "Dispersal of the environmental weed Bridal Creeper, Asparagus asparagoides, by Silvereyes, Zosterops lateralis, in south-western Australia." Emu - Austral Ornithology 101, no. 1 (March 2001): 39–45. http://dx.doi.org/10.1071/mu00069.

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Willis, Anthony J., Rachel McKay, John A. Vranjic, Marion J. Kilby, and Richard H. Groves. "Comparative seed ecology of the endangered shrub,Pimelea spicataand a threatening weed, Bridal Creeper: Smoke, heat and other fire-related germination cues." Ecological Management & Restoration 4, no. 1 (April 2003): 55–65. http://dx.doi.org/10.1046/j.1442-8903.2003.00131.x.

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TURNER, PETER J., JOHN K. SCOTT, and HELEN SPAFFORD. "The ecological barriers to the recovery of bridal creeper (Asparagus asparagoides(L.) Druce) infested sites: Impacts on vegetation and the potential increase in other exotic species." Austral Ecology 33, no. 6 (September 2008): 713–22. http://dx.doi.org/10.1111/j.1442-9993.2008.01839.x.

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Stansbury, C. D., and J. K. Scott. "The history, distribution and rate of spread of the invasive alien plant, bridal creeper, Asparagus asparagoides (L.) Wight, as determined from a questionnaire survey of landholders in south-western Australia." Diversity Distributions 5, no. 3 (May 1999): 105–16. http://dx.doi.org/10.1046/j.1472-4642.1999.00030.x.

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Dissertations / Theses on the topic "Bridal creeper"

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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 systematic sampling strategy was adopted and data collected for a variety of landscape and vegetative variables including cover and abundance of A. asparagoides and the data were presented in a Geographic Information System (GIS). Preliminary results show that the distribution of A. asparagoides within a remnant vegetation patch is not random. It appears to have entered the reserve from two boundaries, spreading toward the centre, which to date remains sparsely colonised despite the capacity of this weed to spread rapidly over long distances by birds. A number of other outcomes are noted. Asparagus asparagoides establishment is prevented in pasture where sheep and cattle graze, and paddocks subjected to tillage practices. The exclusion of grazing in fenced off vegetation in pastures demonstrates rapid weed establishment and colonisation several hundred metres from main infestation. Field observation and visual inspection of temporal progress of invasion (using above ground weed density with tuber appearance to infer age) appear to suggest that invasion into remnant is associated with the track network. This age/density assumption is strengthened when spatial distribution is examined using a data set where low-density values for A. asparagoides are removed and compared with a data set using all A. asparagoides density values. The mapping of A. asparagoides in fenced off farm remnants suggests that velocity of spread at 191m/yr is a considerable underestimate. Subsequent analysis shows that the spatial distribution of A. asparagoides is not completely spatially random while intensity surface analysis highlights regions of low and high intensity located near track network. Mapping a density surface within GIS provided confirmatory evidence for the establishment of satellite clusters along the track network. The change in the intensity surface observed using the two data sets (lowdensity values and all density values) is also consistent with an expanding invasion occurring between two time periods. Spatial point pattern analysis using K-function statistics shows that xxii the clustering observed using GIS appears to be occurring at two scales or distances (130m- 160m and 195m-205m). The association between tracks and the invasion process observed in the initial stages of the study is examined. There is a change in density as a function of distance from a track where the density of A. asparagoides appears to reduce the further away from the track a site is and this relationship holds regardless of track width. The final stages of the study look at the development of a predictive model. Visual exploration of the data through mapping in a GIS and field observation made during data collection provide the starting point for the development of logistic models to estimate the probability of A. asparagoides presence. Finally the best overall logistic model is applied to a second independent site to determine the general applicability of the model. A number of variables that impact on the presence of A. asparagoides, particularly during the initial stages of the invasion process, are identified. While all the identified variables and the overall model are statistically significant, the model is found to correctly predict presence/absence in only 67% of cases overall. The model however could be expected to correctly predict the presence of A. asparagoides in 74% of cases and has a false positive rate of 40%. The model is applied at a second independent site and found to have an overall percent correct rate of 80% and correctly predicted A. asparagoides presence in 94% of cases. The variables identified as influential in the early stage of invasion are relatively easy to acquire by simple field survey that does not require specialist skills. When considering the model as a tool for the management of remnant vegetation communities, high false positive rates may lead to limited resources being spent on searching sites where there is no weed. However, a high false negative rate would have a larger impact on the management of the weed since the undetected infestations would form sources for new propagules. The model performs well from this point of view in that it provided low false negative rates at both sites. The value of the predictive model is its ability to provide managers with information regarding specific areas to target for weed eradication and management can use the model to assess the effectiveness of any control measures by going back to obtain new cover density data, then using the model to examine the changes over time. The model also provides a starting point for the development of a generic model of A. asparagoides invasion at sites outside of Phillip Island and could also provide the starting point for developing models that could be used for other bird-dispersed fleshy-fruited weed species.
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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.
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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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 Varina-Enon Bridge is a post-tensioned concrete box-girder bridge in Richmond Virginia. Cracks in the bridge prompted an investigation into the magnitude of prestress loss experienced by the structure. To estimate prestress loss, a computer model of the structure was created. In addition, data from sensors previously installed on the bridge were used to back calculate prestress loss. It was found that the estimation of losses from the field closely matched those estimated at the construction of the bridge. Additionally, more updated loss models estimated similar, or slightly smaller values for prestress loss.
Master of Science
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 Varina-Enon Bridge is a post-tensioned concrete box-girder bridge in Richmond Virginia. Cracks in the bridge prompted an investigation into the magnitude of prestress loss experienced by the structure. To estimate prestress loss, a computer model of the structure was created. In addition, data from sensors previously installed on the bridge were used to back calculate prestress loss. It was found that the estimation of losses from the field closely matched those estimated at the construction of the bridge. Additionally, more updated loss models estimated similar, or slightly smaller values for prestress loss.
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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 modified 79 in. Bulb Tee beams with a design compressive strength of 9,000 psi were periodically measured to determine camber growth. Most available models for concrete creep and shrinkage were used to calculate creep and shrinkage strain. The modulus of elasticity equation of each model was used to predict modulus of elasticity of the studied mix. The Shams and Kahn compressive strength and modulus of elasticity equations were modified in order to approximate measured modulus of elasticity. The creep, shrinkage, and modulus of elasticity equations were used as inputs to an incremental time step method. The time-dependent change in beam curvature calculated by the time step method was used to calculate theoretical camber using the Moment-Area method. Predicted camber, using inputs from each considered model, was then compared with measured camber to determine the most accurate camber prediction models. Season of casting was also examined to determine what, if any, affect ambient temperature has on camber growth. For the studied beams, the Shams and Kahn Model for creep, shrinkage, and modulus of elasticity, used as inputs for an incremental time step analysis, were found to most accurately predict camber values. Lower concrete compressive strength was observed for test cylinders from beams cast in summer versus beams cast in winter. Differences in beam deflection based on season of casting showed mixed results.
Master of Science
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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 test data in order to quantify results and determine the best model to use for the mixes examined during this research project. Data analysis revealed that the AASHTO time dependent effects (shrinkage and creep) models outperformed the other models used in this research project. Other material property data including compressive strength, splitting tensile strength, Young's modulus of elasticity, and unrestrained shrinkage was also collected to compare against a common bridge deck topping mix to ensure that the mixes used in this research project are suitable for use in the field. A parametric study utilizing the Age Adjusted Effective Modulus (AAEM) method was performed which showed that the most important factor in reducing tensile stresses was to decrease the amount of shrinkage experienced by the concrete bridge deck topping mixture. Three concrete mixtures, one included saturated lightweight aggregates (SLWA), one including ground granulated blast furnace slag (GGBFS), and one incorporating both were tested. Preliminary results show that the inclusions of SLWA into a concrete mixture reduced shrinkage by 25% and overall tensile stress by 38%.
Master of Science
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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 remaining service life, accurately quantifying prestress losses is important. Two approaches are used to predict long-term prestress losses on the Varina-Enon Bridge. The first approach involves a finite element computer model of the bridge which run a timedependent staged-construction analysis to obtain predicted prestress losses using the CEB-FIP '90 code expressions for creep and shrinkage. The second approach involves the compilation of data from instrumentation mounted in the bridge to back calculate the effective prestress force. The analysis using the computer model predicted the prestress losses as 44.6 ksi in Span 5, 47.9 ksi in Span 6, 45.3 ksi in Span 9, and 45.9 ksi in Span 11. The prestress losses estimated from field data were 50.0 ksi in Span 5, 48.0 ksi in Span 6, 46.7 ksi in Span 9, and 49.1 ksi in Span 11. It can be seen that relative to the results of field data estimations, the finite element analyses underestimated prestress loss, but given the degree of uncertainty in each form of estimation, the results are considered to fit well.
Master of Science
In order to apply a precompression force to concrete structures, post-tensioned concrete employs stressed steel strands. To construct lighter, stiffer structures, this popular building technology can be used. The steel strands undergo a reduction in force known as prestress losses over time. To make good decisions about the remaining life of a structure, the precise calculation of the prestress losses is very important. The Varina-Enon Bridge is a post-tensioned concrete box-girder bridge in Richmond Virginia. In July of 2012, observation of flexural cracks in the bridge by the inspectors promoted a study regarding long-term prestress losses in the structure. Two techniques are used to predict long-term prestress losses for this bridge. A computer model of the bridge is used in the first method to calculate losses using the design code. In order to measure prestress losses, the second technique used data from sensors mounted on the bridge. It was found that the estimation of losses closely matched those predicted at the time of the bridge construction and the computer model results. Based on this the final conclusion is made that the prestress loss in the Varina-Enon Bridge is not significantly more than expected.
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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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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 utilizes a time-dependent staged-construction analysis in a finite element model of the full structure to obtain predicted prestress losses using the CEB-FIP '90 code expressions for creep and shrinkage. The second method involves collecting data from instrumentation installed in the bridge that is used to back-calculate the effective prestress force. The prestress losses predicted by the finite element model were 44.9 ksi in Span 5, 47.8 ksi in Span 6, and 45.3 ksi in Span 9. The prestress losses estimated from field data were 50.0 ksi in Span 5, 48.0 ksi in Span 6, and 46.7 ksi in Span 9. The field data estimates were consistently greater than the finite element model predictions, but the discrepancies are relatively small. Therefore, the methods used to estimate the effective prestress from field data are validated. In addition, long-term prestress losses in the Varina-Enon Bridge are not significantly greater than expected.
Master of Science
Post-tensioned concrete uses stressed steel strands to apply a precompression force to concrete structures. This popular building technology can be used to create lighter, stiffer structures. Over time, the steel strands experience a reduction in force known as prestress losses. Accurately quantifying prestress losses is critical for understanding and maintaining a structure during its remaining service life. The Varina-Enon Bridge is a cable-stayed, prestressed box girder bridge located in Richmond, Virginia. Inspectors noticed cracking in July of 2012 that prompted concerns regarding long-term prestress losses in the structure. Prestress losses were estimated using two methods. The first method utilized a computer model of the full bridge. The second method used data from sensors installed on the bridge to back calculate prestress losses. It was found that the prestress losses estimated from field data were slightly greater than, but closely aligned with, the computer model results. Therefore, it was concluded that the Varina-Enon Bridge has not experienced significantly more prestress losses than expected.
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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 elimination of the thermal bridges between interior and exterior boundaries. The main motivation for choosing the topic of thesis was to find materials derived from recycled or secondary raw materials that would be suitable for manufacturing composite applicable for structural details in the envelope of the building and for insulating in humid environment. An economic and environmental aspect plays an important role in the choice of material. The main theme of the thesis is the laboratory manufacturing of a composite with a thermoplastic matrix derived from recycled plastic materials and waste foam as a phase. Has been developed a unique Waste-based Particle Polymer Composite (WPPC) made from recycled foam and polypropylene. However, before WPPC can be reliably used by construction designers, physical properties of WPPC must be accurately identified. Therefore, it was designed laboratory manufacturing system and sample testing system, it was studied thermal, mechanical, thermomechanical and moisture absorptivity of WPPC. Application of finished composite material with satisfying thermal insulation properties to structural details to eliminate the thermal bridge, was the next step. These are details of the unloaded, prefabricated balconies, windows, atics, as well as basement constructions and the heel of the central load-bearing wall, the terrain flooring and the staircase wall
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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 reinforced polymer (CFRP) tendons and to develop guidelines for CFRP in post-tensioned bridge applications, including segmental bridges and pier caps. An experimental investigation and a numerical simulation were conducted to compare the performance of a scaled segmental bridge model, post-tensioned with two types of carbon fiber strands and steel strands. The model was tested at different prestress levels and at different loading configurations. While the study confirms feasibility of both types of carbon fiber strands for segmental bridge applications, and their similar serviceability behavior, strands with higher elastic modulus could improve structural performance and minimize displacements beyond service loads. As the second component of the project, a side-by-side comparison of two types of carbon fiber strands against steel strands was conducted in a scaled pier cap model. Two different strand arrangements were used for post-tensioning, with eight and six strands, respectively representing an over-design and a slight under-design relative to the factored demand. The model was tested under service and factored loads. The investigation confirmed the feasibility of using carbon fiber strands in unbonded post-tensioning of pier caps. Considering both serviceability and overload conditions, the general performance of the pier cap model was deemed acceptable using either type of carbon fiber strands and quite comparable to that of steel strands. In another component of this research, creep stress tests were conducted with carbon fiber composite cable (CFCC). The anchorages for all the specimens were prepared using a commercially available expansive grout. Specimens withstood 95% of the guaranteed capacity provided by the manufacturer for a period of five months, without any sign of rupture.
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Books on the topic "Bridal creeper"

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Rosa, Michael A. Improving predictions for camber in precast, prestressed concrete bridge girders. [Olympia, Wash.]: Washington State Dept. of Transportation, 2007.

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Sepúlveda, Jovanny. Estrategia y gestión organizacional. CUA - Medellin, 2020. http://dx.doi.org/10.52441/ciadcon202004.

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Aspectos como la globalización, la competitividad y la digitalización de procesos, hacen que las organizaciones se transformen y busquen más y mejores alternativas para sobrevivir, es así como las instituciones educativas, con el objetivo de ser pertinentes a las necesidades del entorno, le apuestan a la investigación como una herramienta de gestión que identifica y fortalece acciones desde la fundamentación y la comprensión de ámbitos internacionales para contextualizarlos a las necesidades nacionales y locales. La Corporación Universitaria Americana con la firme convicción de aportar a la sociedad desde la investigación, presenta el libro denominado Estrategia y gestión organizacional para que se comprendan algunas realidades académicas y empresariales y se brinde desde aquí el inicio de una exploración que perdure en la comunidad. Se considera que, desde la integración de instituciones educativas, grupos de investigación, docentes, estudiantes y empresarios, es la mejor apuesta para fusionar saberes y experiencias que construyan sociedad en un mundo que cada día es más exigente y requiere mejores atenciones. Los líderes de los proyectos investigativos que se articulan a este libro han venido comprendiendo la importancia de profundizar en aspectos locales, nacionales e internacionales que le aporten a las organizaciones y les permitan identificar las fortalezas o debilidades para construir propuestas de valor que apoyen en la gestión de cualquiera de las áreas. Por ello, las temáticas que se exponen en cada uno de los capítulos obedecen a un producto organizado y juicioso de investigadores expertos e integrantes de semilleros que empiezan a ver en la investigación una alternativa para el crecimiento y apoyo a dificultades reales de la sociedad. La naturaleza de las temáticas evidencia una necesidad que, con el planteamiento desarrollado, finalmente muestra una apuesta para que tanto académicos, como empresarios se apoyen en este libro para identificar la contextualización y propuesta de valor y quizá puedan replicar diferentes abordajes que sean de impacto a las organizaciones y a la comunidad en general. En los últimos años la investigación ha ganado importancia en los escenarios académicos, por lo que el apoyo desde la gestión administrativa y académica de las instituciones educativas para los docentes investigadores y estudiantes que integran los semilleros se hace más notoria, ya no solamente se investiga para conocer o profundizar más en determinado tema, sino que también se hace para trascender e impactar las organizaciones que integran la economía de un país. Los productos investigativos que se presentan a continuación brindan una estructura teórica desde el planteamiento problemático, y así mismo demuestran desde la metodología planteada la ruta que permitió un desarrollo importante y unos resultados que esperan aportar a empresas y a sectores claramente definidos. Aspectos como la planeación, organización, innovación y emprendimiento son la constante en este libro y se espera que puedan ser comprendidos en el contexto en el que se desarrollaron y que generen una luz para quienes desean indagar estas temáticas en otros entornos. Los diferentes grupos de investigación asociados a esta obra han construido alternativas para difundir propuestas investigativas que generen un importante reconocimiento a las instituciones educativas y a la sinergia que debe existir con el sector empresarial, sin embargo, una de las principales apuestas que se pretende abordar en los años venideros, será seguir construyendo academia de la mano de todos los sectores económicos y proponer ideas que brinden una mayor solución a las necesidades organizacionales. Es así que pensar en la consecución de temáticas como la adaptación organizacional como ventaja competitiva, herramientas digitales como alternativa de gestión, posicionamiento a partir del entendimiento del entorno, emprendimiento con sabor a café de Colombia, la satisfacción como estrategia educativa, valoración de emprendimientos hechos realidad, evaluación de políticas públicas y medioambientales, retos organizacionales en el contexto actual, la innovación y la competitividad que se plantean en este libro será una oportunidad importante para que desde la academia se continúe explorando y conociendo más información fundamentada y organizada para que las empresas tomen como punto de partida la conceptualización y la apliquen de una manera estructurada, seguramente el resultado será la comprensión, la unión y el creer en los procesos investigativos como generadores de valor para un mejor desarrollo empresarial. El libro Estrategia y gestión organizacional se desarrolla en quince capítulos y está organizado de manera que involucra aspectos de apoyo empresarial desde lo técnico y práctico que permiten brindar una línea en la sostenibilidad organizacional de manera holística y articulada a los diferentes grupos de interés que intervienen en la sociedad.
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Book chapters on the topic "Bridal creeper"

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Dujmović, Darko, Boris Androić, and Ivan Lukačević. "Determination of Creep and Shrinkage Values on an Example Composite Highway Bridge." In Composite Structures According to Eurocode 4, 15–26. D-69451 Weinheim, Germany: Wiley-VCH Verlag GmbH, 2015. http://dx.doi.org/10.1002/9783433604908.ch2.

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Xia, He, Nan Zhang, and Weiwei Guo. "Dynamic Analysis of Train-Bridge System Under Beam Deformation Induced by Concrete Creep and Temperature Effect." In Dynamic Interaction of Train-Bridge Systems in High-Speed Railways, 537–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54871-4_10.

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"Slip and creep performance for metallized connection faying surfaces used in steel bridge construction." In Sustainable Bridge Structures, 91–100. CRC Press, 2015. http://dx.doi.org/10.1201/b18775-5.

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Zeineddine, M., W. Raphael, and A. Chateauneuf. "Basic creep study and formulation of a new model." In Bridge Maintenance, Safety, Management, Resilience and Sustainability, 4027–31. CRC Press, 2012. http://dx.doi.org/10.1201/b12352-599.

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Yamato, H., O. Andrade, K. Torii, and T. Tarui. "Mechanisms of fracture of steel bars in ASR-affected bridge piers." In Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, 1139–45. Taylor & Francis, 2008. http://dx.doi.org/10.1201/9780203882955.ch152.

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Jiang, W., and D. Lu. "Time-dependent reliability analysis of CFST arches for in-plane stability considering concrete creep." In Bridge Maintenance, Safety, Management and Life Extension, 237–42. CRC Press, 2014. http://dx.doi.org/10.1201/b17063-30.

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Lounis, Z., D. Cusson, and L. Daigle. "Extending service life of high performance concrete bridge decks with internal curing." In Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, 1441–47. Taylor & Francis, 2008. http://dx.doi.org/10.1201/9780203882955.ch190.

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Salib, S. "Utilizing construction stages to control bridge movement due to creep and shrinkage." In Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, 1317–20. Taylor & Francis, 2008. http://dx.doi.org/10.1201/9780203882955.ch173.

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Noda, Y., Y. Kitano, K. Osawa, and I. Takahashi. "Study on re-deterioration of patch repair on a salt-damaged concrete bridge." In Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, 1123–29. Taylor & Francis, 2008. http://dx.doi.org/10.1201/9780203882955.ch150.

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Vráblík, L., J. Losko, and V. Kristek. "Numerical simulations of prestress loss due to creep and shrinkage in singular regions of concrete members." In Bridge Maintenance, Safety, Management, Resilience and Sustainability, 3948–53. CRC Press, 2012. http://dx.doi.org/10.1201/b12352-588.

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Conference papers on the topic "Bridal creeper"

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Hołowaty, J., and D. Jurkowski. "Creep of Concrete in Bridge Standards." In 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479346.092.

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Bažant, Z. P., M. H. Hubler, R. Wendner, and Q. Yu. "Progress in Creep and Shrinkage Prediction Engendered by Alarming Bridge Observations and Expansion of Laboratory Database." In Ninth International Conference on Creep, Shrinkage, and Durability Mechanics (CONCREEP-9). Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784413111.001.

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Haohui, Xin, Liu Yuqing, Zheng Shuangjie, and Ma Biao. "Creep and Shrinkage Analysis of Composite Truss Bridge with Double Decks." In 10th Pacific Structural Steel Conference (PSSC 2013). Singapore: Research Publishing Services, 2013. http://dx.doi.org/10.3850/978-981-07-7137-9_022.

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Jiang A-lan and Yao Chang-jian. "Research on high-speed railway PC continuous girder bridge creep and shrinkage." In 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5776457.

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Jia, Buyu, and Quansheng Yan. "Analysis of creep effects for a cable-stayed bridge with composite girder." In Fourth International Conference on Experimental Mechanics, edited by Chenggen Quan, Kemao Qian, Anand K. Asundi, and Fook S. Chau. SPIE, 2009. http://dx.doi.org/10.1117/12.851646.

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Lei, Jun-Qing, Hang Xu, and Li-Qun Zou. "Comparative Analysis of Various Kinds Concrete Creep Prediction Models." In 2011 Joint Rail Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/jrc2011-56010.

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The ratio of bridges to High-speed Railway line in China is very high. The influence of concrete creep to bridge structure is very high, so it is necessary to study creep of concrete in depth. In this thesis, experimental data of four important regions in China are collected, and the curves of concrete creep are analyzed. While, by comparing the domestic and foreign curves of Concrete Creep Prediction Models, the difference between them could be found. In addition, the theory of long-term deformation of concrete obtained by short-time experiment, which is proposed by Professor Bazant is used. According to experimental data, the creep curves are fittd by regression method. Finally, the comparison between common prediction models and Bazants’ theory is carried out, it can be found that the regression value is closed to the measured value.
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Suza, Dominik, Johann Kollegger, and Harald S. Müller. "Influence of changing environment conditions on the development of shrinkage strain and the expansion coefficient of large concrete specimens." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.1954.

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<p>The standard creep and shrinkage strain measurements of concrete are usually conducted in a laboratory with constant temperature and humidity with a low variation. The creep and shrinkage measurements are conducted over a few months with the expectation that small concrete specimens can sufficiently describe the evolution of the rheology effects on a large multi-span bridge in the course of its operating life.</p><p>The monitoring of real bridge structures shows the actual progression of the deflections and concrete strains. Unfortunately the evaluation and interpretation of the measured values is complicated. The idea of the scientific Creep &amp; Shrinkage project was to combine the two described situations (laboratory experiments and monitoring of real bridge structures) creating an experimental setup which would benefit from the advantages of both approaches.</p><p>In order to achieve conformity of the measured test results with those of theoretical models (MC 2010, EC) it was necessary to upgrade the current models to include the effects of changing temperature and humidity. Within this paper the upgrade of the current standard models to include changing environment conditions will be elaborated, in addition to an explanation of the method used to separate shrinkage strains from the temperature strains from the measured data. The measured concrete expansion coefficients will also be discussed.</p>
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Kaeck, Walter E., Frederick C. Rhyner, and James Warner. "Engineering and Design for Deep Foundation Creep and Grouting at the Thames River Bridge." In Proceedings of the Fourth International Conference on Grouting and Deep Mixing. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412350.0045.

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Bao, Longsheng, Guang Li, Ling Yu, and Guangshan Zhu. "Impact Analysis of Concrete Shrinkage and Creep on a Prestressed Concrete Box Girder Bridge." In Fifth International Conference on Transportation Engineering. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479384.141.

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Hedegaard, Brock D., Catherine E. W. French, and Carol K. Shield. "Modeling and Prediction of Time-Dependent Deformations of the I-35W St. Anthony Falls Bridge." In 10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures. Reston, VA: American Society of Civil Engineers, 2015. http://dx.doi.org/10.1061/9780784479346.090.

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