Gotowe bibliografie tematyczne / Anchorage

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Gotowa bibliografia na temat „Anchorage”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 2 listopada 2024

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Artykuły w czasopismach na temat "Anchorage"

Huang, Fei Xin, Hai Bo Jiang, Chun Gen Wei, Shi Wu Ouyang i Xiang Long. "The Finite Element Analysis of the End Anchorage under Larger Prestressing Load in Rehabilitation Engineering". Advanced Materials Research 97-101 (marzec 2010): 4395–98. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.4395.

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Anchorages are the most important structure in the bridge’s rehabilitation engineering under external prestressing load, whose stress distribution is complex, it is necessary to carry out a detailed and careful structure analysis of anchorages. The inspection and strengthening design of an extra-large Bridge in Dongpu of Guangzhou City was taken for the background in the paper, the longitudinal stress, transverse stress and vertical stress of the end anchorage were given before and after adding concrete block, through finite element analysis of the end anchorage under larger prestressing load and the results of calculation of the anchorage were analyzed, it was showed that the strengthened effect of the end anchorage had been very obvious after concrete block was added. At the same time it was found that there were still some deficiencies on the end anchorage after concrete was added and the suggestions of the local strengthening of the end anchorage were proposed. It is helpful and referenced for the design of similar anchorage.

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Wang, Wen Yuan, Guo Lei Tang, Zi Jian Guo, Xiang Qun Song i Peng Cheng Du. "Study on the Impact of Inner Anchorage on Waterway Traffic Capacity". Applied Mechanics and Materials 438-439 (październik 2013): 2013–16. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.2013.

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As the number of calling ships in container terminals rises, waterways in some harbors have become the major constraint to the overall performance of the ports service. By constructing anchorages, the congestion that happens frequently in harbor can be effectively eased, thus the traffic capacity is greatly enhanced. The purpose of this paper is to study the impact of anchorage number on waterway traffic capacity and provide theoretical foundation when deciding the anchorage scale. A simulation method with consideration of anchorages is adopted to analyze the vessels entering and departing process in coastal container terminal. Results show that waterway traffic capacity and anchorage number are polynomial correlated, waterway traffic capacity increases with the growth of anchorage number and ceases when beyond a certain level. It will be of great help to serve the planning and constructing ports and terminals.

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Long, Zhe, Zhi-xin Yan i Chun-bo Liu. "Shear Effects on the Anchorage Interfaces and Seismic Responses of a Rock Slope Containing a Weak Layer under Seismic Action". Mathematical Problems in Engineering 2020 (30.04.2020): 1–11. http://dx.doi.org/10.1155/2020/1424167.

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The shear effects on the anchorage interfaces under seismic action is a key problem requiring urgent investigation in the field of rock and soil anchorages. In this paper, the model of rock slope with a weak layer was constructed by pouring, and the large-scale shaking table model test was completed. The shear strain on the anchorage interfaces and the acceleration of the slope were collected using built measurement systems. The shear effects on the two anchorage interfaces (a bolt-grout interface and a grout-rock interface) and seismic responses of the slope under seismic action were investigated. The distribution laws of the shear stress on the two anchorage interfaces along the axial direction of the bolt under seismic action were gained. The variations of the peak acceleration amplification coefficient on the slope surface, the magnitude, and the growth rate of peak shear stress on the anchorage interfaces under seismic action with different excitation directions and intensities were obtained. Furthermore, the positive relationship between the shear effect on the anchorage interfaces and the seismic response of slope was revealed. This study provides support for theoretical research, numerical simulation analysis, and aseismic design of rock and soil anchorages under dynamic conditions.

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Mazhari, Marzieh, Mehrnaz Moradinejad, Mohsen Mazhary, Atefe Rekabi i Vahid Rakhshan. "Effects of Rigid and Nonrigid Connections between the Miniscrew and Anchorage Tooth on Dynamics, Efficacy, and Adverse Effects of Maxillary Second Molar Protraction: A Finite Element Analysis". BioMed Research International 2022 (14.10.2022): 1–33. http://dx.doi.org/10.1155/2022/4714347.

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Introduction. Direct, rigid indirect, and nonrigid indirect absolute anchorages using temporary anchorage devices (TADs, mini-implants/miniscrews) can provide promising opportunities for challenging, yet common, orthodontic tooth movements such as molar protraction. Rigid rectangular wire and ligature wire are the most common methods of attaching a tooth to a miniscrew in indirect anchorages. We aimed to provide a comparison of the rigidity of the connecting wire in terms of stress on the miniscrew, the anchorage loss, and the risk of root resorption using finite element analysis (FEA). Methods. The maxillary right second molar was protracted into the proximal space at a 150 g load (1) using direct absolute anchorage with a tapered miniscrew implanted between the premolar roots and using indirect absolute anchorage with the second premolar reinforced by the miniscrew through (2) a rigid stainless steel (SS) wire or (3) a nonrigid SS ligature wire (4) at different elastic moduli. Stresses and displacements of 4 models’ elements were measured. The risk of external root resorption was evaluated. Results. Connecting the tooth to the miniscrew using rigid full-size wire (model 2) compared to ligature (model 3) can give better control of the anchorage (using the ligature wire, the anchorage loss is 1.5 times larger than the rectangular wire) and may reduce the risk of root resorption of the anchorage unit. However, the risk of miniscrew failure increases with a rigid connection, although it is still lower than with direct anchorage. The miniscrew stress when using a ligature is approximately 30% of the rigid model using the rectangular wire. The miniscrew stress using the rectangular wire is approximately 82.4% of the miniscrew stress in the direct model. Parametric analysis shows that the higher the elastic modulus of the miniscrew-tooth connecting wire in the indirect anchorage, the less the anchorage loss/palatal rotation of the premolars/and the risk of root resorption of the anchorage teeth and instead the stress on the miniscrew increases. Conclusions. Direct anchorage (followed by rigid indirect anchorage but not nonrigid) might be recommended when the premolars should not be moved or premolar root resorption is a concern. Miniscrew loosening risk might be the highest in direct anchorage and lowest in nonrigid indirect anchorage (which might be recommended for poor bone densities).

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Lim, Hyunsung, Seunghwan Seo, Junyoung Ko i Moonkyung Chung. "Effect of Joint Characteristics and Geometries on Tunnel-Type Anchorage for Suspension Bridge". Applied Sciences 11, nr 24 (9.12.2021): 11688. http://dx.doi.org/10.3390/app112411688.

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In this study, the pull-out behavior of a tunnel-type anchorage was examined by considering both geometric and rock joint characteristics. Three-dimensional finite element analyses were performed with reference to the tunnel-type anchorage cases designed and constructed in Korea. The factors influencing the anchorage response were analyzed: the enlarged part, anchorage spacing, joint orientation, spacing, and the shear strength of the rock joints. According to the numerical studies, the size of the enlarged part influenced the failure shape of the tunnel-type anchorage. It was found that the anchorage spacing, the relationship between the tunnel-type anchorage, and the joint orientation and spacing greatly influenced the pull-out behavior of the anchorage. Additionally, the friction angle had a larger impact on the anchorage’s pull-out resistance than the cohesion between the rock joints.

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Otaren, Joseph, i Idia Iyamu. "Application of Temporary Anchorage Devices in Orthodontics: A Literature Review". Cross River Journal of Medicine 2, nr 1 (2023): 24. http://dx.doi.org/10.5455/crjmed.147164.

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Anchorage control is one of the most essential keys for success in clinical orthodontics. Anchorage loss is a primary concern associated with orthodontic procedures. Numerous devices have been proposed and used for over a century to get the appropriate anchorage. Extraoral anchorages such as headgears or facemasks are the most effective tools but are limited because their effectiveness depends on patient compliance. Using skeletal anchorage, such as Temporary Anchorage Devices (TADs), to retract anterior maxillary teeth is an old technique developed in 1945. Despite their small diameter and short length, TADs can provide stable anchorage for multiple tooth movements, including intrusion, retraction, and protraction. This article examined the various applications of temporary anchorage devices (TADs) in clinical orthodontics. The risk factors and complications of TADs application in clinical orthodontics were identified. As the younger generations of orthodontists enter practice and the academic arenas, TADs use will continue to increase if trends continue as they have in the past several years.

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Ryu, Ji-In, Seoung-Won Cho, So-Hee Oh, In-Young Park, Ju-Won Kim, Soo-Hwan Byun i Byoung-Eun Yang. "A Novel Approach Using Customized Miniplates as Skeletal Anchorage Devices in Growing Class III Patients: A Case Report". Applied Sciences 10, nr 12 (12.06.2020): 4067. http://dx.doi.org/10.3390/app10124067.

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Facemasks using tooth-borne anchorages have been used primarily for the treatment of Class III malocclusion with maxillary undergrowth. However, when using a tooth as an anchorage, if the stability of the tooth used as an anchor is weak, the anchoring function may fail as the tooth tilts. Meanwhile, the use of skeletal anchorages such as implants, mini-implants, and mini-plates has been claimed to minimize the side effects of using dental anchorage. This case report describes the treatment of a six-year-old male patient with Class III malocclusion, presenting maxillary undergrowth and mandibular prognathism. Due to the mobility of the anchoring primary teeth, a device using dental anchorage was replaced with that using customized skeletal anchorage for the treatment. Customized guides and miniplates for the surgery were fabricated in advance through a computer-assisted system, in order to avoid possible damage to the adjacent tooth buds. The customized plates were accurately and passively placed on the intended part, showing the desired outcome.

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Li, Yalong, Taining Shi, Yafeng Qiu, Yuanlin Zhu i Longkang Zhang. "Anchorage Research for CFRP Tendons: A Review". Materials 17, nr 13 (1.07.2024): 3208. http://dx.doi.org/10.3390/ma17133208.

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Carbon fiber reinforced polymer (CFRP) tendons are composite materials that offer significant advantages in terms of tensile strength and lightweight properties. They are being increasingly utilized in the construction industry, particularly in bridge cables and building structures. However, due to their relatively poor transverse mechanical properties compared to steel cables, securing these tendons with anchors presents a challenge. This paper reviews the structure and force characteristics of three types of anchors for CFRP tendons—clamping anchorage, bonded anchorage, and composite anchorage—analyzes and summarizes the anchorage characteristics and damage mechanisms of each type of anchorage, and highlights that the optimization of the mechanical properties of the tendons is key to the design and research of anchoring systems. The new composite anchorage offers comprehensive advantages, such as minimal tendon damage at the anchorage section, more uniform stress distribution, and better anchorage performance, despite being more complex in design compared to single-type anchorages. However, there remain challenges and research gaps in testing and validating these anchoring systems under realistic loading and environmental conditions, including impacts, cyclic stresses, humidity, and high temperatures. Future efforts should focus on developing new testing techniques and models to simulate real-world conditions, enabling more accurate assessments of anchorage performance and longevity. By doing so, we can fully harness the mechanical properties of CFRP tendons and further enhance the safety and efficiency of our built environment.

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Liu, Zihao, Dan Zhou, Zhongyi Zheng, Zhaolin Wu i Longhui Gang. "An Analytic Model for Identifying Real-Time Anchorage Collision Risk Based on AIS Data". Journal of Marine Science and Engineering 11, nr 8 (5.08.2023): 1553. http://dx.doi.org/10.3390/jmse11081553.

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With the increasing volume of ship traffic, maritime traffic safety is facing a great challenge because the traffic in port becomes more and more crowded and complicated, which will make ship collisions more likely to happen. As a special water area of the port, the anchorage is also threatened by collision risk all the time. For accurately assessing the collision risk in anchorage and its adjacent waters in real time, this paper proposed an analytic model based on Automatic Identification System (AIS) data. The proposed anchorage collision risk model was established in microscopic, macroscopic, and complexity aspects, which considered ship relative motion, anchorage characteristics, and ship traffic complexity, respectively. For validation, the AIS data of the anchorages near the Shandong Peninsular were used to carry out a series of experiments. The results show that the proposed model can identify the anchorage collision risk effectively and has an advantage in dealing with complicated scenarios. The proposed anchorage collision risk model can help maritime surveillance better monitor and organize the ship traffic near the port and provide mariners with a reference about the collision risk situation of the anchorage on their route, which are important to improving maritime traffic safety.

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Kryvko, Andriy, Erick Juán Bautista González i Didier Samayoa Ochoa. "Failure analysis of anchorage of cable-stayed bridge with internal defects". Science Progress 104, nr 3 (lipiec 2021): 003685042110414. http://dx.doi.org/10.1177/00368504211041481.

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The influence of the internal defects in the anchorages of cable-stayed bridges, generated either during the fabrication process or due to the usage time on their mechanical properties and failure probability is studied. Internal defects were distributed according to the probability density functions of types, sizes, quantities, and locations obtained from the experimental studies. The Finite Element Method (FEM) is applied to simulate the behaviour of the anchorages with and without internal defects under external forces, which affect the bridge, such as wind and traffic. It was shown that the mechanical properties of the anchorage without internal defects are in the range of its application, but in the case of an anchorage with internal defects, approximately 0.1% of the observed maximum stresses approximate the yield stress. The latter could result in permanent material deformation or fracture. The probability of failure of an anchorage is discussed.

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Rozprawy doktorskie na temat "Anchorage"

Jambi, Safa Abdulsalam A. "Investigations into orthodontic anchorage". Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/investigations-into-orthodontic-anchorage(b3769a47-e782-4b85-b8b4-21cb186e0fdd).html.

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Background and objectives: The control of anchorage is integral to successful orthodontic treatment. The objective of this research was to undertake three related projects to evaluate methods of increasing anchorage with the aim of adding to orthodontic knowledge and improve methods of treatment delivery. Methods: Two Cochrane systematic reviews were undertaken according to the methods published in the Cochrane Handbook for Systematic Reviews of Interventions, version 5.1.0. The influence of functional appliances on tooth position and the extraction decision was performed as a retrospective study using participants from a completed multicentre randomized trial. Results: 1- Statistically and clinically significant differences were found between the mean values of distal molar movement when surgical anchorage and conventional anchorage were compared. 2- Statistically significant differences were found between the mean values of distal molar movement and mesial upper incisor movement when intraoral distalising appliances and cervical headgear were compared.3- Fixed and removable functional appliances are equally effective in anchorage preparation. The type of functional appliance and time spent in Phase I treatment influenced the amount of lower incisor proclination. Conclusions: 1- Surgical anchorage is more effective than headgear without the inherent risks and compliance issues. However, intraoral appliances used in adolescence for distalisation of upper molars do not appear to have any advantages over cervical headgear. 2- Functional appliances reduce the anchorage requirements of a case primarily by reduction of the overjet, both fixed and removable functional appliances are equally effective in obtaining this. However, fixed functional appliances result in greater lower incisor proclination than removable functional appliances. 3- The type of functional appliance (removable or fixed) does not influence the extraction decision, however, this is influenced by overall space requirements.

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Theil, Ian. "Anchorage-dependent mammalian cell culture". Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56768.

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Genetically engineered anchorage-dependent human embryonic kidney (293) cells were cultured at 37$ sp circ$C on 1 mm thick sheets of a fibrous polymeric matrix having an average fibre diameter of 10.2 $ mu$m and a void fraction of 0.81 using Dulbecco's Modified Eagle's Medium (DMEM) supplemented with 10% fetal bovine serum (FBS) and 2.5 mM glutamine. Immobilization efficiencies above 70% were observed when cells were added to 100 mL spinner flasks (operating at 60 rpm) containing 70 mL of medium and two 1 x 1 cm squares of matrix (total gross area of 2 cm$ sp2$) fastened to the base of the stirrer shaft. Loadings in excess of 2.4 $ times 10 sp7$ cells per cm$ sp2$ of matrix were measured after 2 h.
The state of the cultures was followed by measuring the consumption of glucose and glutamine and the production of lactate and ammonium.

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Camli, Umit Serdar. "Anchorage Strength Of Fiber Reinforced Polymers". Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606752/index.pdf.

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Fiber reinforced polymers (FRPs) have gained popularity in upgrade projects for reinforced concrete structural elements within the last decade because of its ease of application and high strength-to-weight ratio. In the design of an effective retrofitting solution by means of an FRP system, the anchorage capacity has an important role. This study presents the results of an experimental program conducted to determine the strength of carbon fiber reinforced polymers (CFRPs) bonded to concrete prisms or hollow clay tiles that are finished with or without plaster. In the experimental program, different types of anchorage methods were tested in a double shear push-out test setup. A simple and effective strength model is proposed for strip type anchorages based on the existing analytical models and experimental observations from this study. This new model is suitable for determining the design capacity of CFRP-to-concrete and CFRP-to- hollow clay tile joints with or without plaster and accounts for the presence of embedment and concrete strength. Obtained results by using this model were found to closely match with the experimental observations.

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Tsui, Wai-kin, i 徐偉堅. "Bone anchorage for orthodontic tooth movement". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44661605.

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Littlejohn, G. S. "Studies relating to ground anchorage systems". Thesis, University of Edinburgh, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.653958.

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This thesis comprises 28 papers which illustrate the nature and direction of development work and associated research undertaken between 1965 and 1993 on soil and rock anchorage systems. The research was performed in order to obtain a basic understanding of the behaviour of newly developed anchorage systems in a variety of ground types and conditions, in order to improve anchorage designs, construction methods and testing procedures, and thereby encourage the safe and economic application of ground anchorages worldwide. Field development of anchorage construction methods in gravels, sand, clays, marls and chalk using cement grout injection techniques is described together with equations evolved to estimate the ultimate resistance to withdrawal for each ground type, based on systematic testing of full scale anchorages. A new design method for single and multi tied stiff retaining walls installed in any soil is detailed and validated by large scale tests and closely monitored case histories. The interactions between wall, anchorage and soil are illustrated, coupled with the refinement of overall stability analyses in cohesionless soils using wedge and log spiral based mechanics of failure. For the rapid installation of anchorages in granular soils, vibratory driving is investigated in the laboratory and two distinct types of motion are found to exist. Theoretical equations of motion are developed to define the penetration processes and facilitate the design of vibrodrivers and vibrohammers. World practice in relation to the design, construction, testing and behaviour of rock anchorages is appraised, and field studies permit an improved understanding of uplift capacity by general shear failure, load transfer mechanisms, bond at rock/grout and grout/tendon interfaces, debonding, service performance and post-failure behaviour.

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Ivanović, Ana. "The dynamic response of ground anchorage systems". Thesis, University of Aberdeen, 2001. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=165281.

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This thesis describes the development of the lumped parameter model and the results obtained from it. In order to fully utilise the response signatures obtained from GRANIT, it is essential to understand the effect of the various components of the 'complete ground anchorage system' such as protruding free and fixed length of the anchorage, anchorage head assembly, affected and non-affected rock mass. In order to monitor each subsystem and its dynamic response to potential changes/failures, the anchorage system, in its simplest form, is represented by the model which comprises seven masses and a number of spring/damper systems replicating the components described earlier. Ordinary differential equations for mass/spring/dash-pot elements were then configured and the model was implemented in software form and then solved for both time and frequency domain. The acceleration response was examined at a number of points in the anchorage system i.e. at the protruding length as well as at the anchorage head, along the free length, along the fixed length and even within the rock mass itself. Several laboratory and field anchorage applications were simulated using the lumped parameter model and the results obtained from the model. A parametric study was then undertaken with regard to addressing mechanisms which are generally present in anchorage applications such as changes of material properties of the resin and concrete, the introduction of defects, such as gaps along the fixed anchorage length or debonding at the proximal fixed anchorage length, and the influence of changes in post tension load on the dynamic response of the anchorages. Furthermore, an investigation of the impulse load was conducted with the aim of further development of the current impact device in order to be able to assess anchorages regarding the mechanisms mentioned earlier.

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Ibell, Timothy. "Behaviour of anchorage zones for prestressed concrete". Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259477.

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Hao, Jinde. "Dynamic responses of soil anchorages using numerical and centrifuge modelling techniques". Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24846.

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Muhamad, Khairussaleh Nor A. "Fatigue of cable anchorage on cable stayed bridge". Thesis, University of Surrey, 2016. http://epubs.surrey.ac.uk/811083/.

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Studies have shown that the connection details used for cable anchorage blocks on cable-stayed bridges have the potential for fatigue damage due to fluctuating stresses generated by the cyclic traffic loads passing over the bridge. To investigate the fatigue damage and determine the remaining fatigue life of a cable anchorage block used on a cable-stayed bridge, finite element (FE) analyses were undertaken by using the Fatigue Load Model 4 (FLM 4) proposed by the Eurocodes to identify the most fatigue-critical locations within the details. One of the main objectives of this research was to identify the critical area prone to fatigue in the anchorage block due to the response in traffic loads. Therefore, two types of numerical models of a typical cable anchorage block were analysed as a three dimensional sub-model which was driven by global cable forces obtained from the global analysis of a three-span cable-stayed bridge. These models are of the cable anchorage block without the longitudinal girder modelled and the cable anchorage block with the longitudinal girder modelled. The cable anchorage blocks without the longitudinal girder model were classified into three categories of model types namely; model types 0, A and B. Similarly, the cable anchorage blocks with the longitudinal girder model were classified as model types A-G, B-G and C-G. These model classifications are based on several boundary conditions simulated in the analyses. In addition to this, the fatigue behaviour of the cable anchorage block was analysed by using three different approaches namely; by using the nodal stresses at the location of the stress concentration (node stress concentration), by using a stress averaged over an area in the vicinity of the stress concentration (average elements) and by using the hot-spot method, in order to identify the stress ranges that adversely affect the remaining fatigue life of cable anchorages. Each approach was analysed with three different mesh sizes; 5mm by 5mm, 10mm by 10mm and 20mm by 20mm in order to carry out a mesh sensitivity analysis of the resulting stresses and associated stress ranges. The 10mm by 10mm mesh size was found to be most appropriate for this fatigue appraisal. This finding is supported because the 10mm by 10mm mesh size is specified in several code of practices such as the International Institute of Welding (IIW) and BS 7608 as guidance for use when determining hot-spot stress when using the hot-spot method for the fatigue analyses of a welded detail. The critical stresses from model type C-G were used in the fatigue appraisal as the behaviour of this model represented more accurately the actual cable anchorage block on the cable-stayed bridge compared to the other types of models used. Model type C-G were selected for further fatigue appraisal as this model include the correct boundary conditions and applied load that represented the actual condition of the anchorage behaviour on the cable-stayed bridge. This included the movement of the top anchorage block due to the displacement of the cable and in addition the deck movement. Also, non-uniform pressure was applied on the bearing plate which was included to model possible construction tolerances which was one of the important properties of the model type C-G. In evaluating the possible fatigue damage in the cable anchorage block, the cumulative model for fatigue failure expressed in terms of Miner’s rule was used. In addition to this, the condition of the structural detail due to fatigue with increasing traffic loading was determined by projecting traffic volume increases of up to 20%. Based on the results calculated, if the long distance traffic characteristic was used in fatigue appraisal, the cable anchorage block was justified to be not ‘safe’ as the damage accumulation for fatigue, Dd at the top gusset was recorded as 1.270, which exceeded the limiting value of 1.0 corresponding to a 120 year design life. However, if medium distance traffic characteristic was used in the fatigue appraisal, the cable anchorage block will remain ‘safe’ except when a 20% increase in traffic volume was included in the analysis, which resulted in Dd value of 1.016. Also, if a more conservative value of Dd = 0.5 as suggested by IIW (2008) was used, the cable anchorage block appraised by using both the long distance and medium distance traffics was found not safe from fatigue damage and would not survive its design working life without structural repair. For future fatigue appraisals of anchorage blocks (and other important structural details), it is strongly recommended that the numerical model of anchorage block is analysed together with the longitudinal girder using the hot-spot method. A 10mm by 10mm finite element mesh size is suggested and it is also necessary to specify the displacement at the top of the anchorage block to simulate the cable movement together with the girder movement both of which are obtained from the global analysis of the whole bridge structure.

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Hui, Macarious Kin Fung. "Anchorage of stirrups in prestressed concrete I-girders". Thesis, University of British Columbia, 2016. http://hdl.handle.net/2429/57783.

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The current research investigates the performance of commonly-used non-code-compliant stirrup detailing in concrete I-girder bridges, specifically when the lower hooks on the stirrups are oriented parallel to the longitudinal prestressing strands and are not bent around any longitudinal bars. Such detailing does not meet the specifications in the Canadian Highway Bridge Design Code CSA S6-06. An experimental investigation was conducted on full-scale partial sections of a concrete I-girder to evaluate the performance of such non-code-compliant stirrup anchorages by comparing their performance to the performance of code-compliant stirrup anchorages. An analysis of an example concrete I-girder bridge was conducted to determine the demands on the stirrup anchorage during the tests. In the tests, the flexural tension force was applied to the prestressing strand while a diagonal force was applied to the web of the test specimens at approximately 30° to the longitudinal axis of the specimen. Two pairs of stirrups were fixed to a support as the diagonal force was applied. The ratio of the slip of the stirrup to the strain along the exposed length of the stirrup, which equals to the debonded length, was monitored in order to observe the performance of the stirrup anchorage. After applying many cycles of the diagonal force, including about 100 cycles after yielding of the stirrups, the non-code-compliant hooks were found to perform adequately.
Applied Science, Faculty of
Civil Engineering, Department of
Graduate

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Książki na temat "Anchorage"

Oberle, Joseph. Anchorage. Minneapolis, MN: Dillon Press, 1990.

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Aamodt, Bjørn. Anchorage: Dikt. Wyd. 2. [Oslo]: Gyldendal, 1997.

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Xu, Tian Min, red. Physiologic Anchorage Control. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48333-7.

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Sandström, Sven. Anchorage of imagination. Stockholm, Sweden: Almqvist & Wiksell International, 1987.

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B, Hasselwander Gerard, i American Concrete Institute, red. Anchorage to concrete. Detroit: American Concrete Institute, 1987.

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Wunderlich, Mark. The Anchorage: Poems. Amherst, USA: University of Massachusetts Press, 1999.

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United States. Federal Emergency Management Agency., red. Flood insurance study: Municipality of Anchorage, Alaska, Anchorage division. Wyd. 2. [Washington, D.C.]: Federal Emergency Management Agency, 2002.

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United States. Federal Emergency Management Agency., red. Flood insurance study: Municipality of Anchorage, Alaska, Anchorage division. [Washington, D.C.?]: Federal Emergency Management Agency, 1987.

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Eligehausen, R., R. Mallée i J. F. Silva. Anchorage in Concrete Construction. Berlin, Germany: Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, 2012. http://dx.doi.org/10.1002/9783433601358.

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Kim, Ki Beom, red. Temporary Skeletal Anchorage Devices. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-55052-2.

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Części książek na temat "Anchorage"

Gooch, Jan W. "Anchorage". W Encyclopedic Dictionary of Polymers, 38. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_613.

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Olsen, Alexander Arnfinn. "Anchorage". W Core Principles of Maritime Navigation, 136–43. London: Routledge, 2022. http://dx.doi.org/10.1201/9781003291534-11.

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Gill, Daljit S., i Farhad B. Naini. "Orthodontic Anchorage". W Orthodontics: Principles and Practice, 282–86. West Sussex, UK: John Wiley & Sons, Ltd,., 2013. http://dx.doi.org/10.1002/9781118785041.ch29.

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Schwab, Manfred. "Anchorage-Independent". W Encyclopedia of Cancer, 1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2015. http://dx.doi.org/10.1007/978-3-642-27841-9_261-2.

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Ennos, A. R., i S. Pellerin. "Plant Anchorage". W Root Methods, 545–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04188-8_16.

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Sousa Camposinhos, Rui de. "Dowel Anchorage". W Stone Cladding Engineering, 103–17. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6848-2_6.

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Sousa Camposinhos, Rui de. "Undercut Anchorage". W Stone Cladding Engineering, 119–36. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6848-2_7.

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Sousa Camposinhos, Rui de. "Kerf Anchorage". W Stone Cladding Engineering, 137–54. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-6848-2_8.

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Melsen, Birte, i Carlalberta Verna. "Anchorage Problems". W Adult Orthodontics, 132–62. West Sussex, UK: John Wiley & Sons, Ltd., 2013. http://dx.doi.org/10.1002/9781118702925.ch8.

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Vaden, James L. "Classical Orthodontic Anchorage: A Century of Progress". W Physiologic Anchorage Control, 3–34. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-48333-7_1.

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Streszczenia konferencji na temat "Anchorage"

Xu, Qigang, Qiyu Tao, Li Chen i Rui Gu. "Study on Anchorage Type Selection of Sichuan Bank of Sichuan Kahalo Jinsha River Bridge". W IABSE Congress, Nanjing 2022: Bridges and Structures: Connection, Integration and Harmonisation. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2022. http://dx.doi.org/10.2749/nanjing.2022.2093.

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Sichuan kahalo Jinsha River Bridge is a suspension bridge with a main span of 1030m, and the anchorages on both sides are gravity anchorages. In order to adapt to special terrain and geological conditions, anchorage of Sichuan bank pioneered the use of frame structure as the anchorage foundation. The soil and the frame structure jointly bear the vertical load and resist the horizontal component of the main cable to form a "frame soil" community and fully mobilize the role of the undisturbed soil. At the same time, the distributed grouting technology is used to strengthen the soil around the frame structure, so as to further improve the safety factor. This paper introduces the topography and geology of the anchorage position, compares and selects different anchorage foundation schemes, and explains in detail the design concept, structure size and construction technology of the frame foundation.

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Yubao Zhan i Chunan You. "Determination of effective anchorage length". W 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5776296.

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Ramos, Michelle, i Brian Gastrock. "Trenchless in Anchorage — Case Studies". W Construction Research Congress 2009. Reston, VA: American Society of Civil Engineers, 2009. http://dx.doi.org/10.1061/41020(339)128.

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Maglica, Adriano. "The Anchorage, An Unexpected Journey". W IABSE Conference, Copenhagen 2018: Engineering the Past, to Meet the Needs of the Future. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/copenhagen.2018.476.

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The Älvsborg Bridge was opened to traffic in 1966. The Bridge was built between 1963 and 1966 and the bridge has undergone rehabilitation and improvement during its lifetime. The secondary hangers have been exchanged and dehumidification have been installed on the cables. Railing separating pedestrians and vehicles has been improved and the waterproofing is undergoing exchange.During a routine inspection of dehumidification, aug 2016, an anchorage failure was observed. In the north west anchorage one of the fiftyfive lock coil cables was spotted laying on the bottom of the spreading chamber.A number of inspections and investigations including endoscope inspections and safety calculation has been performed. Short term measurements and long term has been evaluated. Starting from limited knowledge of the condition the owner, Swedish Transport Administration (STA) now has a good picture of the condition and plans for repairs.The damage highlights the need of inspection methods of “non inspectable” parts on bridges from the past as well as needs to design inspectable solutions on critical bridge parts in the future.

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"Confinement Role in Anchorage Capacity". W SP-180: Bond and Development of Reinforcement - A Tribute to Dr. Peter Gergely. American Concrete Institute, 1998. http://dx.doi.org/10.14359/5877.

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"Tests of Undercut Anchors". W SP-103: Anchorage to Concrete. American Concrete Institute, 1987. http://dx.doi.org/10.14359/1674.

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"Load Relaxation Tests". W SP-103: Anchorage to Concrete. American Concrete Institute, 1987. http://dx.doi.org/10.14359/1640.

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"Transverse Load Capacity of Multi-Dowel Anchorages in Concrete". W SP-103: Anchorage to Concrete. American Concrete Institute, 1987. http://dx.doi.org/10.14359/1701.

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"Load Capacity of Unheaded Bolts in Concrete and Influence of Welding". W SP-103: Anchorage to Concrete. American Concrete Institute, 1987. http://dx.doi.org/10.14359/1723.

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"Wedge-Type Expansion Anchor Performance in Tension". W SP-103: Anchorage to Concrete. American Concrete Institute, 1987. http://dx.doi.org/10.14359/1722.

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Raporty organizacyjne na temat "Anchorage"

Murray, Matthew, i Daniel Harder. Performance of Army Corps of Engineers mat system using anchorless connections : a follow-on study of site stabilization for the Improved Ribbon Bridge Bridge Supplemental Set. Engineer Research and Development Center (U.S.), maj 2024. http://dx.doi.org/10.21079/11681/48592.

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The US Army Engineer Research and Development Center conducted testing of the Army Corps of Engineers mat system with improved anchorage and connection hardware. Low-profile screw anchors replaced the ground anchorage of the existing system to reduce wear to tracks and wheels of vehicles while trafficking the system. Anchorless connections allowed the system to be placed over soils where the use of screw anchorage would be obstructed or would cause hazards to trafficking vehicles. Test tracks were constructed to evaluate the matting system with new anchorage and connection hardware over three different soils of weak sand and clay. Channelized traffic was applied to the test tracks using a loaded common bridge transporter. Performance of the updated system was evaluated with respect to results from previous testing, indicating that the improved anchorage and connection hardware increased the versatility of the matting system without sacrificing system performance.

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Fanous, F., L. Greimann, W. Wassef i D. Bluhm. Performance of Sequoyah Containment Anchorage System. Office of Scientific and Technical Information (OSTI), styczeń 1993. http://dx.doi.org/10.2172/10115741.

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Weems, S. M., i R. A. Combellick. Seismically induced ground-failure susceptibility, Anchorage, Alaska. Alaska Division of Geological & Geophysical Surveys, 1997. http://dx.doi.org/10.14509/741.

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Updike, R. G., i C. A. Ulery. Engineering - geologic map of southwest Anchorage, Alaska. Alaska Division of Geological & Geophysical Surveys, 1986. http://dx.doi.org/10.14509/2270.

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Benaud, Christelle. Role in MYC in Anchorage-Dependent Growth. Fort Belvoir, VA: Defense Technical Information Center, wrzesień 1999. http://dx.doi.org/10.21236/ada377816.

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Salisbury, J. B., A. M. Herbst i Katreen Wikstrom Jones. November 30, 2018, Mw 7.1 Anchorage earthquake photogrammetry. Alaska Division of Geological & Geophysical Surveys, 2019. http://dx.doi.org/10.14509/30270.

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Maurer, M. A. Water-quality data for Potter Marsh, Anchorage, Alaska. Alaska Division of Geological & Geophysical Surveys, 1997. http://dx.doi.org/10.14509/1814.

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Papakosta, Lefkothea. The Late Roman Anchorage of Cape Petounda, Cyprus. Honor Frost Foundation, 2020. http://dx.doi.org/10.33583/utm2020.09.

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Welsh, Catherine. Cyclin D1, Anchorage-Independent Growth and Breast Cancer. Fort Belvoir, VA: Defense Technical Information Center, październik 2001. http://dx.doi.org/10.21236/ada405221.

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Johnson, Mark K., H. S. Lew i Long T. Phan. Literature review of post-installed anchorage in concrete. Gaithersburg, MD: National Bureau of Standards, 1988. http://dx.doi.org/10.6028/nbs.ir.88-3797.

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