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Gotowa bibliografia na temat „Concrete Fatigue”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 7 września 2023

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Artykuły w czasopismach na temat "Concrete Fatigue"

Liu, Hanbing, Guobao Luo, Peilei Zhou, Haibin Wei, Wenjun Li, and Di Yu. "Flexural-Fatigue Properties of Sustainable Pervious Concrete Pavement Material Containing Ground Tire Rubber and Silica Fume." Sustainability 11, no. 16 (August 18, 2019): 4467. http://dx.doi.org/10.3390/su11164467.

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With the development of urbanization, pervious concrete has been increasingly used in urban road pavement structures. The objective of this paper was to investigate the effect of stress levels and modifier (ground tire rubber and silica fume) on the fatigue life of pervious concrete and establish the fatigue equations with different survival probabilities. In order to improve the deformability of pervious concrete without sacrificing its strength, ground tire rubber and silica fume were added into pervious concrete. Two kinds of pervious concrete, control pervious concrete and ground tire rubber and silica fume modified pervious concrete, were made in the laboratory. The pervious concrete beam specimens of 100 × 100 × 400 mm were casted, and the static flexural strength and flexural strain of the two kinds of pervious concrete were tested. The fatigue lives of two pervious concretes were tested using MTS fatigue testing machine under four different stress levels (0.85, 0.80, 0.75, and 0.70). The fatigue life was analyzed by two-parameter Weibull distribution. The parameters of Weibull distribution were determined by graphical method, maximum likelihood method and moment method. The Kolmogorov–Smirnov test was used to test the Weibull distribution and the fatigue equations under different survival probabilities were established. The results showed that ground tire rubber and silica fume modified pervious concrete had better deformability while ensuring strength compared to control pervious concrete. The addition of ground tire rubber and silica fume improved the fatigue life of pervious concrete. The two-parameter Weibull distribution was suitable to characterize the fatigue characteristics and predict the fatigue life of pervious concrete. Fatigue equations with different survival probabilities were a good guide for pervious concrete design.

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Chen, Bo, Liping Guo, and Wei Sun. "Fatigue Performance and Multiscale Mechanisms of Concrete Toughened by Polymers and Waste Rubber." Advances in Materials Science and Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/684207.

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For improving bending toughness and fatigue performance of brittle cement-based composites, two types of water-soluble polymers (such as dispersible latex powder and polyvinyl alcohol powder) and waste tire-rubber powders are added to concrete as admixtures. Multiscale toughening mechanisms of these additions in concretes were comprehensively investigated. Four-point bending fatigue performance of four series concretes is conducted under a stress level of 0.70. The results show that the effects of dispersible latex powder on bending toughness and fatigue life of concrete are better than those of polyvinyl alcohol powder. Furthermore, the bending fatigue lives of concrete simultaneously containing polymers and waste rubber powders are larger than those of concrete with only one type of admixtures. The multiscale physics-chemical mechanisms show that high bonding effect and high elastic modulus of polymer films as well as good elastic property and crack-resistance of waste tire-rubber powders are beneficial for improving bending toughness and fatigue life of cementitious composites.

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Cao, Qing Yu, Wei Sun, and Li Ping Guo. "Study on Gas Anti-Permeability of Fiber Concrete under Fatigue Loading." Advanced Materials Research 243-249 (May 2011): 793–96. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.793.

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Cracking is the most common damage in the secondary lining concrete because of its continuous thin-walled structure, potential surrounding rock pressure and poor curing conditions. In order to improve the fatigue and gas perimeability resistance of concrete and to reduce the responding costs, four series modern concretes including ultra-fine pozzolanic powder and organic fibers are prepared and investigated. The optimized modern secondary lining concrete is determined as the concrete including 0.08% or 0.1% volume fractions of ultra-fine organic fiber (UF), based on the test results of fatigue life and coefficient of gas-permeability under fatigue loading. The result show fiber concrete is positive for enhancing the fatigue and gas permeability resistance and can apply for the tunnel secondary lining.

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Raue, Erich, and Enrico Tartsch. "EXPERIMENTAL RESULTS OF FATIGUE AND SUSTAINED LOAD TESTS ON AUTOCLAVED AERATED CONCRETE." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 11, no. 2 (June 30, 2005): 121–27. http://dx.doi.org/10.3846/13923730.2005.9636341.

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The fatigue strength of concrete is lower than its static strength. An attempt was made to accelerate the destabilisation process due to microcracking by the application of fatigue loads. The aim of this was to get ready access to information about concrete's sustained loading strength. The fatigue strength of autoclaved aerated concrete (AAC) was observed by applying cyclic loads to unreinforced cylinders. AAC was found to be less sensitive to fatigue loads than lightweight concrete. The fatigue tests were supplemented by tests using sustained loads. It could be assumed that the behaviour under both static and fatigue loads was comparable with that of lightweight and normal concrete. A substantial influence of load duration was found, especially at high load levels.

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Chuong, Le Hong, Ung Quoc Trang, and Ngo Lam. "Asphalt concrete testing device: Studying and designing based on the properties of asphalt concrete." Journal of Science and Technology in Civil Engineering (STCE) - NUCE 13, no. 1 (January 31, 2019): 60–65. http://dx.doi.org/10.31814/stce.nuce2019-13(1)-06.

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With the purpose of obtaining the shear strength parameters (friction angle, φ, and cohesion, c) of asphalt concretes. At the present time, almost the testing devices were designed based on the condition of the vehicle's load when they are moving on the pavement structure. That means, the fatigue resistance of the interfaces was determined through the loads acting at the interfaces between layers are repetitive mechanical action of the moving vehicles. With that view, the ratio of the normal and shear fatigue loads of asphalt concrete was not considered in terms of the nature of the material. An asphalt concrete testing device is proposed based on the modification from AST-2 instrument and Shear Fatigue Test instrument. The main parameters of this device are calculated from the ratio of shear stress and normal stress at the fatigue of the asphalt concrete according to the Mohr-Coulomb failure criterion. Test results with asphalt specimens show that the device is stable, the acting vertical loads were smaller and more stable. Keywords: normal strength; shear stress; asphalt concrete; fatigue stresses. Received 4 December 2018, Revised 20 December 2018, Accepted 24 January 2019

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Tamayo, Pablo, Gilberto García Del Ángel, José A. Sainz-Aja, Ana I. Cimentada, Jesús Setién, Juan A. Polanco, and Carlos Thomas. "Fatigue Behaviour of Concrete Using Siderurgical Aggregates." Applied Sciences 13, no. 4 (February 14, 2023): 2439. http://dx.doi.org/10.3390/app13042439.

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The use of concrete with aggregates with reduced environmental impact, as is the case of concrete with siderurgical aggregates (recovered slags), will inevitably increase in the future, as a result of policies promoting development of more sustainable construction materials. These concretes offer an excellent response to static loads, but their behaviour under dynamic loads has not yet been studied. The aim of this study is to characterize the fatigue behaviour, in terms of fatigue limit, of a concrete with siderurgical aggregates by comparing it with an analogous conventional limestone concrete. This characterization was carried out using the Locati method, which stands out for its convenience, speed and low cost, with the feature of being carried out at a high frequency corresponding to the resonance frequency. Performing high-frequency tests has drastically reduced test times and thus costs. Likewise, the results obtained show that, using various criteria found in the literature, concrete with siderurgical aggregates has a higher fatigue limit in absolute terms (MPa), but a lower one in relative terms (% fc).

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Wilkes, W. Jack. "FATIGUE Concrete vs. Steel." PCI Journal 34, no. 4 (July 1, 1989): 76–79. http://dx.doi.org/10.15554/pcij.07011989.76.79.

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Hobbs, R. E. "Fatigue of reinforced concrete." International Journal of Fatigue 14, no. 6 (November 1992): 410. http://dx.doi.org/10.1016/0142-1123(92)90230-a.

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Yan, Hui Qun, Qing Yuan Wang, and Ning Yan. "Experimental Research on Fatigue Behavior of Recycled Aggregate Reinforcement Concrete Made from Building Scrap." Advanced Materials Research 339 (September 2011): 448–51. http://dx.doi.org/10.4028/www.scientific.net/amr.339.448.

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In consistent with sustaining development, circularly utilizing the scrap concrete was an important measure for country and human beings. With the development and extensive application of Recycled aggregate concrete (RAC), it, as a structure, certainly would be attacked by unfavorable environments and occurred destroy or invalidation, such as fatigue (vibration load of vehicle or equipment). But, its fatigue behavior is different from other concretes as a result of different property of the aggregate of recycled concrete and other concrete. In order to apply RAC more effectively, it is necessary to study its properties especially for those aggregates from earthquake-stricken area for post-earthquake reconstruction. Therefore, on the basis of experimental research, the fatigue behaviors and microstructure of recycled concrete are studied in this paper. The present paper deals with investigations on fatigue behavior of the axial and eccentric compression performance of recycled aggregate reinforcement concrete specimens with contain recycled aggregate proportion of 0%、50%、100%, when specimens were effected by constant amplitude sine wave fatigue load imposed from 110kN~190KN with 5Hz frequency. Then the expansion and diversification of RAC cracks were real time was watched. Based on the analysis of experiment results, it can be proved that it’s feasible to apply RAC to practical engineering.

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Adresi, Mostafa, Jean-Marc Tulliani, Giuseppe Lacidogna, and Paola Antonaci. "A Novel Life Prediction Model Based on Monitoring Electrical Properties of Self-Sensing Cement-Based Materials." Applied Sciences 11, no. 11 (May 30, 2021): 5080. http://dx.doi.org/10.3390/app11115080.

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Assessing the damage level in concrete infrastructures over time is a critical issue to plan their timely maintenance with proper actions. Self-sensing concretes offer new opportunities for damage assessment by monitoring their electrical properties and relating their variations to damage levels. In this research, fatigue tests were conducted to study the response of a self-sensing concrete under high-cycle dynamic loading. The concept of G-value was defined as the slope of the voltage response baseline of the self-sensing concrete over time that reflects the damage created under the fatigue-loading test. Based on this definition, log (G)–log (N) curves were obtained using a linear regression approach, with N representing the number of cycles during the fatigue tests. While traditional fatigue curves S-log (N) are used to estimate the remaining life under fatigue loading, log (G)–log (N) diagrams can be used to determine the damage level based on the voltage response of the self-sensing concrete as a function of the loading history. This finding can be useful for the estimation of the lifetime and remaining life of self-sensing concrete structures and infrastructure, eventually helping to optimize the related maintenance operations.

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Rozprawy doktorskie na temat "Concrete Fatigue"

Katwan, Moufaq Jassem. "Corrosion fatigue of reinforced concrete." Thesis, University of Glasgow, 1988. http://theses.gla.ac.uk/5327/.

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This work is concerned with the corrosion fatigue characteristics of full-scale reinforced concrete beams partially submerged in 3.5% NaCl solution or in tapwater of low dissolved salt content. The test beams were subjected to constant amplitude fatigue loading in uni-directional or reverse bending at slow cycle rate of 0.17 Hz and various load levels. The test programme had two stages: Stage I, carried out at relatively high load levels, represented a study of the fatigue-failure phenomenon but also provided guides for the more detailed study undertaken in Stage II which was devoted to low load conditions under which the main steel deterioration process was corrosion. In the latter stage, attention was focused on the monitoring of a number of electrochemical parameters including the corrosion rate. Late in the programme, electrochemical noise technique was also examined. The phenomenon of concrete crack blocking, previously reported in seawater environment, was observed in both test environments in this work. This phenomenon was closely examined and the mechanisms of the formation of deposits and its effects were described. A hypothesis was proposed for the structural behaviour of reinforced concrete beams during cyclic loading in aqueous environment. Failure normally occurred by the fracture of one of the main tensile bars due to fatigue, often followed immediately by yield of the remaining bar and beams collapse. Fracture surfaces were examined under SEM.Corrosion rate measurements involved formidable difficulties which had to be overcome to obtain accurate measurements. For instance, the current interruption technique for the estimation of the IR-drop was developed and established as the most appropriate method for concrete beams with complex reinforcement configuration. Extensive polarisation measurements indicated clear effect of the test condition on the technical variables involved in various measuring techniques (viz potentiodynamic and potentiostatic techniques). Based on these observations a criterion has been proposed to determine the appropriate variables necessary for the accurate determination of the polarisation resistance Rp. The work has demonstrated that the corrosion behaviour of reinforced concrete sustaining dynamic loading is extremely complex, and short term indications could not be used safely for long term predictions. Based on corrosion rate measurements and the actual corrosion pattern observed upon completion of the tests, a concept of a change in corrosion mechanism from a microcell process of relatively low corrosion rates to a macrocell process at much accelerated high rates is introduced. The prevailing mechanism depends on time of exposure, load level and reinforcement details. Results from long running fatigue tests in seawater from concurrent research were incorporated which also support this concept.

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Gordon, Paul Mark. "Low Cycle Fatigue Behavior of Concrete with Recycled Concrete Aggregates." DigitalCommons@CalPoly, 2011. https://digitalcommons.calpoly.edu/theses/577.

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A comparison of concrete containing recycled concrete coarse aggregates and natural coarse aggregates subjected to high strain, low cycle compressive fatigue is presented. Using a strain based feedback control loop, concrete cylinders are compressed at 15µε/s to a specified strain then unloaded to zero stress for 10 cycles. After cycling, all samples are loaded to a strain of 0.008. Direct concrete material variables are the water to cement (w/c) ratio, taken as 0.60, 0.45, and 0.39, and percent coarse recycled concrete aggregate content, varied from zero to 100 percent. The primary testing variable is the specified unloading strain. Unloading strains include 60, 75, 90, 100, and 120 percent of the strain at peak stress. Ten batches of concrete were made, generating a total of 224 samples for testing. Findings confirm previous research showing a reduction in strength with increasing recycled concrete coarse aggregate content, an equivalent concrete with only 25 percent replacement of natural coarse aggregates and an equivalent strength concrete with a decrease in the w/c ratio and 100 percent recycled concrete coarse aggregates. Fatigue testing indicates that each cycle’s maximum stress remains unchanged, but the stiffness degrades more rapidly with increasing recycled aggregate content and a constant w/c ratio.

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Foo, M. H. "Behaviour of partially prestressed concrete structures under fatigue loading /." Title page, table of contents and abstract only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phf686.pdf.

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Vetsa, Appalaraju. "Performance of doweled concrete joints subjected to fatigue loading." Morgantown, W. Va. : [West Virginia University Libraries], 2003. http://etd.wvu.edu/templates/showETD.cfm?recnum=3059.

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Thesis (M.S.)--West Virginia University, 2003.<br>Title from document title page. Document formatted into pages; contains xi, 114 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 102-105).

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Luheshi, Yousef Bashir. "The fatigue characteristics of precast concrete raft units." Thesis, University of Newcastle Upon Tyne, 1997. http://hdl.handle.net/10443/1582.

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This research project represents a continuation of the research programme into Precast Concrete Pavement Units, "P. C. P. U. ", which is based in the Department of Civil Engineering at the University of Newcastle upon Tyne. The units were referred to as raft units throughout the thesis which focused on the use of raft units as a full concrete paving system for aircraft parking, taxiway, and other low speed areas, at airports. The physical full scale test model was designed and constructed to represent the applied loading from one of the dual wheel legs of the design aircraft, a Boeing 727-200, when it is taxiing over a raft unit paving system. It was only possible for the test model to be provided with a contact area of 200 mm square compared to the real life of 400 mm square. A theoretical correction was applied to allow for this difference. Sixteen raft units were tested in pairs using the test model. The tests were divided into three modules to investigate the effect of the raft unit dimensions, Module(M1); the reinforcement design, Module(M2); and the raft thickness, Module(M3). The twin loading assembly applied a repetitive dynamic load which was moved manually between four different loading positions to represent the aircraft moving across the raft units. The primary aim of the experimental programme was to identify for the first time the fatigue life and failure mechanisms of the raft units under the influence of twin dynamic moving loads, and provide experimental results to enable a more refined numerical design method to emerge for raft units, as well as to determine the causes of failures and to recommend remedial measures. Observations were made of vertical deflection, concrete strains, crack widths and crack patterns, failure load, and failure modes, each of which were described in detail. The test observations showed that by increasing each of the following variables, namely, the aspect ratio, the amount of steel bar reinforcement and the thickness of the raft units, resulted in each case in an extension of raft unit life. It was found that some form of uplift restraint on the raft unit should be added to improve the fatigue life for one of the loading positions and that fibre reinforcement should not be used. The ultimate load capacity of the raft units was influenced by the loading position, the applied load level and the number of load repetitions, together with the crack patterns. Using the results from the raft units that had failed within a specific module, it was possible to predict the ultimate and reserve load capacity of raft units within the modules that were only partially fatigued. Four important conclusions have been established during the research project. Firstly, based on the test results, an empirical relationship was derived using regression analysis, relating the number of load repetitions to the aspect ratio, the amount of reinforcement, the raft thickness, and the applied loading. This will need further verification, but it should eventually be very useful when estimating the fatigue life of these specific raft unit models. Secondly, a new design method has been proposed. The design methods for raft units proposed previously by Bull, Ismail, Annang, Ackroyd, and the British Port Association were reviewed. The test results enabled a new design method to be developed which was based on Bull's method but proposed new design charts and tables for each of the raft units considered in the research project which introduced the additional variables of contact pressure and the exact loading position. Thirdly, the measured strains were used to develop strain fatigue relationships for designing raft units and estimating the reserve design life in a raft unit paving system for the purpose of maintenance management by relating the accumulated number of load repetitions of a design load to the permissible concrete strain. The strain fatigue equations were generated for each of the raft units considered in this research project. Thus, the most realistic way to control raft unit distress is through the use of a predictive fatigue model. This should prove invaluable to those involved in the maintenance of raft unit paving systems. Finally, life cycle cost analysis was conducted for three types of construction pavement (paving blocks, PQC, and raft units). The analysis demonstrated that the precast concrete raft units will become a viable alternative to conventional pavement construction and a real competitive to the concrete paving blocks.

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James, Valontino Ruwhellon. "Fatigue Behaviour of CFRP Strengthened Reinforced Concrete Beams." Master's thesis, Faculty of Engineering and the Built Environment, 2020. http://hdl.handle.net/11427/32274.

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The performance of reinforced concrete (RC) structures, such as bridges in the heavy haul industry, may be severely impacted by fatigue when subjected to repeated cyclic loading. Fatigue not only reduces load carrying capacity and serviceability limit states (SLS), but it can cause structural failure even when the components are subjected to low stress range cyclic loading. Corrosion damage exacerbates fatigue related problems as chloride induced pitting corrosion facilitates the formation and gradual propagation of cracks under cyclic loading. A common rehabilitation and retrofitting approach that involves patch repairing and fibre reinforced polymer (FRP) strengthening has proven effective to not only restore structural capacity, but also to enhance infrastructure service life. The structural repair process involves the replacement of deteriorated cover concrete with a less permeable patch repair mortar. The patch repair only restores durability of the structure; to restore or enhance structural capacity the repair process further involves bonding of FRP laminates. Particularly in the case of FRP's with a low elastic modulus, the design is often guided by serviceability limit states as opposed to ultimate limit states (ULS), resulting in an over-reinforced structural member. In addition, the reinforcement area of commercially available FRP strengthening may exceed the design requirements, especially at low levels of corrosion damage. In both the abovementioned considerations the design may result in an over-reinforced section. At the time when this researched was proposed, the effect of increasing damage extent on fatigue behaviour of over-reinforced RC beams was not clear and merited further investigation. A scientific experimental approach was developed to investigate the long-term performance of fifteen (15) full-scale 40MPa RC beams with dimensions 155x254x2000mm and ultimate capacity of 62.3kNm. Accelerated corrosion damage was induced in varied extents which included 450mm, 800mm, 1300mm and 1800mm length to a constant degree of 10% on all specimens. Specimens from each damage extent were patch repaired using SikaCrete214 and subsequently strengthened with externally bonded with SikaCarboDurS512 carbon fibre reinforced polymer (CFRP) laminates. Four-point bending monotonic loading tests were conducted on one (1) specimen from each damage extent. The results obtained from the quasi-static tests were used to determine two (2) cyclic loading stress ranges at which the remaining 2 specimens from each damage extent would be tested under. Under the 40% and 60% stress ranges four-point bending cyclic loading tests were carried out at a test frequency of 4Hz. Information was acquired on key performance indicators that included fatigue life, crack development, failure mode and stiffness degradation, where stiffness was assessed in terms of midspan deflection, composite material strains and neutral axis shift. Information on these parameters were collected using strain gauges, linear variable differential transducers (LVDT), DEMEC strain targets and digital image correlation (DIC). Ultimate failure loads under monotonic loading showed that despite having the highest degree of corrosion, the 450mm damage extent specimen had the highest failure load of 325kN. The failure load gradually reduced to 290kN as the damage extent was increased to 1800mm and the 0mm (control) specimen failed at the lowest load of 274kN. In contrast to the static behaviour, the specimen fatigue life enhanced by 106.3% as the damage extent was increased from 450mm to 1800mm. As expected, the 40% stress range tests yielded much longer fatigue lives than their 60% stress range counterparts. Furthermore, the experimentally obtained fatigue lives were compared to three fatigue life prediction models and the Helgason and Hanson model yielded the closest correlation with the experimental results. IV ABSTRACT Crack densities were found to increase with a longer fatigue life. An increase in damage extent was found to positively affect crack development and overall stiffness of the specimen during longterm fatigue testing. This finding was further substantiated by an assessment of midspan deflection, compression concrete strain and carbon fibre strain results, which all suggested a lower neutral axis and a lower stiffness reduction rate under fatigue loading as the damage extent was increased from 450mm to 1800mm. Furthermore, the tension concrete cracks propagated gradually during longer fatigue tests periods, while the tension steel and carbon fibre were comparably less affected by the resultant internal forces. Unfortunately, the neutral axis strain measurements using DEMEC targets were unable to assess the relative effect of an increase in damage extent as well as the compression concrete and carbon fibre strains were able to. During this experimental period, it was established that the laboratory layout was not conducive for carrying out the DIC process of long-term cyclic loading tests. The area in which testing took place did not adequately protect the camera against the environment and therefore required daily storage of the equipment. Regular movement of the camera for storage purposes introduced measurement inaccuracies which accumulated over longer test periods of up 20 days. However, for the short-term tests that did not require movement of the camera, the DIC process yielded favourable results. It was possible to capture the crack patterns early in the test period when the crack growth rate and development of new cracks was high using DIC. It was found that the high strain cracks coincided with the points of maximum vertical deflection (obtained through DIC) and eventual failure location of the specimen. The points of maximum deflection obtained from the DIC process were often not at midspan, which in the absence of the DIC process, would not have been possible to predict accurately. The results have shown that the specimens with the longer damage extents exhibit improved fatigue performance than their shorter counterparts. This revealed a stark contrast to their monotonic loading performance which favoured shorter damage extents. Furthermore, DIC holds potential to predict failure location more accurately than conventional approaches used for structural health monitoring (SHS).

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Dung, Pham-Thanh. "Strengthening of concrete bridges using reinforced sprayed concrete under state and fatigue loading." Thesis, Queen Mary, University of London, 1997. http://qmro.qmul.ac.uk/xmlui/handle/123456789/1575.

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The Department of Transport's bridge assessment programme has revealed that a significant number of bridges are not strong enough to carry the much heavier commercial axle loads that will soon be applied to UK bridges. To address this problem, this research investigates a technique of strengthening concrete bridges by bonding and encapsulating an extra layer of reinforcement using sprayed concrete to the soffit of the bridge to increase the flexural capacity. An experimental investigation on approximately one eighth scale reinforced concrete slabs strengthened by different amounts of reinforcement placed at varying depths below the soffit and encapsulated by professionally applied dry-mix sprayed concrete, have shown that increased flexural capacity of up to eight times the original capacity is possible with no sign of breakdown of the bond at the soffit interface. Separate interface shear tests both direct and indirect were carried out and showed high shear capacities were obtained in all specimens. The susceptibility to weathering causing a breakdown of the interface bond was investigated by freeze-thaw tests. Fatigue load tests have also shown that the strengthened slabs have a similar life span to that of normal reinforced concrete. An analytical study was carried out, complemented by the fatigue load test results, to assess the life span of two highway bridges when subjected to fluctuating traffic loading, taking into account the proposed increasing use of heavier axle loads. All the slabs tested to failure under both static and fatigue loading failed in flexure and extremely good bond between the sprayed concrete layer and its substrate concrete was maintained right up to failure, even without shear connectors. The potential use of this technique in practice was therefore well demonstrated.

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Al-Azzawi, Bakr. "Fatigue of reinforced concrete beams retrofitted with ultra-high performance fibre- reinforced concrete." Thesis, Cardiff University, 2018. http://orca.cf.ac.uk/108101/.

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Concrete structures deteriorate over time due to different reasons and thus may not perform their function satisfactorily. Repair and rehabilitation of deteriorated concrete structures is often preferred over demolition and rebuilding for economic reasons. Various metallic and nonmetallic materials have been used in the past for repair and rehabilitation. These materials have advantages and disadvantages. The latter are connected with the mismatch in the properties of these materials with the material of the structure being repaired which often resulted in unwanted failure modes, e.g. delamination. For this reason, new cement-based ultra-high performance reinforced with steel fibres repair materials have been developed in the last two decades, which restore (and even enhance) the structural response and improve the durability of repaired concrete structures. One such ultra-high-performance fibre-reinforced concrete material is CARDIFRC. It is characterized by very high compressive strength, high tensile /flexural strength, and high energy-absorption capacity. However, it is very expensive and thus industrially uncompetitive due to the very high cost of thin brass-coated steel fibres used in it. It is therefore important to develop a version of CARDIFRC that is industrially competitive. This is one of the objectives of this research. An ultra-high-performance fibre-reinforced concrete (UHPFRC) has been developed that is far less expensive than CARDIFRC and at the same time self-compacting. The steps necessary to achieve this have been described in this work. In addition, a full mechanical and fracture characterisation (i.e. size-independent fracture energy and the corresponding bi-linear stress-crack opening relationship) of this UHPFRC is presented. A nonlinear cracked hinge model has been used to back calculate the stress-crack opening relation of this material in an inverse manner from the test data. The second objective of this research concerns the flexural fatigue behaviour of this new UHPFRC. Tests have been conducted under several stress amplitude ranges. It has been found that the distribution of fibres plays a vital role in its fatigue resistance. Regions with few or no fibres can drastically reduce its fatigue life. As expected, non-zero mean stress leads to a significant reduction in the fatigue life of a material compared to cyclic loading with zero mean. The variation in compliance during cyclic loading has been used to estimate the expected fatigue life under a given cyclic load range, since the tests were terminated at one million cycles. The third objective of this research concerns the flexural fatigue behaviour of RC beams retrofitted with precast strips of this self-compacting UHPFRC on the tension face. Fatigue tests under several stress amplitude ranges have shown that this UHPFRC is an excellent retrofit material under fatigue loading. Again, the variation in compliance during the fatigue loading has been used to estimate the expected fatigue life for retrofitted RC beams.

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Lee, Hon. "Fatigue behavior of concrete beams prestressed with glass fiber reinforced plastic (GFRP) tendon /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202007%20LEE.

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Yacoub, Mohamad Toufic 1957. "PERFORMANCE CRITERIA FOR REINFORCED CONCRETE BEAM-COLUMN CONNECTIONS." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/275564.

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Książki na temat "Concrete Fatigue"

Mallett, G. P. Fatigue of reinforced concrete. London: HMSO, 1991.

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Chia, Way Seng. Effect of prestress on the fatigue life of concrete. [Austin, Tex.]: Center for Transportation Research, Bureau of Engineering Research, University of Texas at Austin, 1986.

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Association, British Cement. Deflections in concrete slabs and beams: Report of a joint project of the British Cement Association, The Concrete Society and The Concrete Centre. Camberley [England]: Concrete Society, 2005.

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E, Romer Andrew, AWWA Research Foundation, and United States. Environmental Protection Agency., eds. Failure of prestressed concrete cylinder pipe. Denver, Colo: Awwa Research Foundation, 2008.

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E, Romer Andrew, AWWA Research Foundation, and United States. Environmental Protection Agency., eds. Failure of prestressed concrete cylinder pipe. Denver, Colo: Awwa Research Foundation, 2008.

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E, Romer Andrew, AWWA Research Foundation, and United States. Environmental Protection Agency., eds. Failure of prestressed concrete cylinder pipe. Denver, Colo: Awwa Research Foundation, 2008.

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Muller, J. F. Fatigue of prestressed concrete beams with inclined strands. Brisbane: University ofQueensland, Dept. of Civil Engineering, 1992.

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1926-, Zia Paul, North Carolina. Dept. of Transportation. Research and Analysis Group., and North Carolina State University. Dept. of Civil Engineering., eds. Fatigue performance of large-sized long-span prestressed concrete girders impaired by transverse cracks. Raleigh, NC: North Carolina Dept. of Transportation, Research & Analysis, 2002.

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Organisation for Economic Co-Operation and Development., ed. OECD full-scale pavement test. Paris, France: Organisation for Economic Co-Operation and Development, 1991.

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Tejchman, Jacek. Simulations of strain localization in plain and reinforced concrete with enhanced continuum models. Gdańsk: Wydawn. Politechniki Gdańskiej, 2010.

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Części książek na temat "Concrete Fatigue"

Alliche, A., and D. Francois. "Fatigue Damage of Concrete." In Fracture of Concrete and Rock, 88–95. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3578-1_10.

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Libby, James R. "Direct Stress Members, Temperature, and Fatigue." In Modern Prestressed Concrete, 501–35. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4615-3918-6_11.

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Baluch, M. H., A. B. Qureshy, and A. K. Azad. "Fatigue Crack Propagation in Plain Concrete." In Fracture of Concrete and Rock, 80–87. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3578-1_9.

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Aguilar, M., H. Becks, A. Baktheer, M. Classen, and R. Chudoba. "Effect of lateral confinement on concrete fatigue life under shear loading." In Computational Modelling of Concrete and Concrete Structures, 154–61. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003316404-19.

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Destrebecq, Jean-François. "Cyclic and Dynamic Loading Fatigue of Structural Concrete." In Mechanical Behavior of Concrete, 185–224. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118557587.ch5.

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Sasiadek, StanisŁaw. "Fatigue Strength of Concrete with Limestone Aggregate." In Brittle Matrix Composites 3, 148–53. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3646-4_16.

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Rantala, Tommi, Olli Kerokoski, Antti Nurmikolu, and Anssi Laaksonen. "Fatigue Loading Tests of Concrete Railway Sleepers." In High Tech Concrete: Where Technology and Engineering Meet, 1445–52. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_166.

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Binsheng, Zhang, Zhu Zhaohong, and Wu Keru. "Fatigue Rupture of Plain Concrete Analysed by Fracture Mechanics." In Fracture of Concrete and Rock, 58–63. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4612-3578-1_6.

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Baktheer, A., M. Aguilar, R. Chudoba, and M. Vořechovský. "Monotonic and fatigue behavior of cementitious composites modeled via a coupled sliding-decohesion-compression interface model." In Computational Modelling of Concrete and Concrete Structures, 510–19. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003316404-60.

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Koekkoek, Rutger T., Cor van der Veen, and Ane de Boer. "Fatigue Tests on Post-tensioned Bridge Decks." In High Tech Concrete: Where Technology and Engineering Meet, 912–20. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59471-2_106.

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Streszczenia konferencji na temat "Concrete Fatigue"

"Fatigue of High-Strength Concrete." In SP-121: High-Strength Concrete: Second International Symposium. American Concrete Institute, 1990. http://dx.doi.org/10.14359/3740.

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Myrtja, E. "Strain development of high strength grouts under compressive fatigue loading and determination of fatigue properties from self-heating measurements." In 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.235506.

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Ortega, J. "Error in the probabilistic characterisation of concrete fatigue." In 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.233352.

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Burcharth, Hans F. "Fatigue in Breakwater Concrete Armour Units." In 19th International Conference on Coastal Engineering. New York, NY: American Society of Civil Engineers, 1985. http://dx.doi.org/10.1061/9780872624382.175.

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"Concrete Damage as a Fatigue Phenomenon." In SP-205: Finite Element Analysis of Reinforced Concrete Structures. American Concrete Institute, 2002. http://dx.doi.org/10.14359/11647.

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Cervenka, J. "Modelling of high-cycle fatigue crack growth in concrete." In 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.236385.

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"Fatigue Characteristics of Reinforced Concrete in Water." In SP-109: Concrete in Marine Environment. American Concrete Institute, 1988. http://dx.doi.org/10.14359/2061.

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Keerthana, K. "Effect of Loading Frequency on Flexural Fatigue Behaviour of Concrete." In 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2019. http://dx.doi.org/10.21012/fc10.233285.

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Qiu, Jishen, Pui See Phan, and En-Hua Yang. "Feasibility Study on ECC Fatigue Life Extension through Self-healing." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.063.

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Ichimaru, Sonoko, Alessandro Fascetti, and John E. Bolander. "Fatigue-induced fracture of pervious concrete: physical and numerical experimentation." In 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures. IA-FraMCoS, 2016. http://dx.doi.org/10.21012/fc9.298.

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Raporty organizacyjne na temat "Concrete Fatigue"

Smith, Matthew, Allen Hammack, Robert Moser, Quincy Alexander, Benjamin Burnham, and Sarah Williams. Concrete growth and fatigue analysis of Chickamauga Lock miter gate anchorages. Engineer Research and Development Center (U.S.), September 2017. http://dx.doi.org/10.21079/11681/23660.

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Barnes, B. Bond and low cycle fatigue behavior of thermoset composite reinforcing for the concrete industry. Office of Scientific and Technical Information (OSTI), September 1990. http://dx.doi.org/10.2172/6824948.

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Issa, Mohsen. Effect of Early-Age Concrete Elastic Properties on Fatigue Damage in PCC Pavements Containing Fibers. Illinois Center for Transportation, December 2017. http://dx.doi.org/10.36501/0197-9191/17-025.

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Olek, J., Menashi Cohen, and Charles Scholer. Use of Modulus of Rupture, Fatigue Resistance and Maturity in Determining Opening to Traffic Time for Concrete Pavements. West Lafayette, IN: Purdue University, 2003. http://dx.doi.org/10.5703/1288284313341.

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Lippert, David, Marshall Thompson, and Charles Wienrank. Performance of Interstate Rubblization in Illinois. Illinois Center for Transportation, July 2021. http://dx.doi.org/10.36501/0197-9191/21-005.

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Streszczenie:

In Illinois, hot-mix asphalt overlaid concrete pavements typically exhibit reflective cracking of joints and cracks from the pavement below, resulting in shortened life and maintenance issues. Over the years, various patching, fabric, and crack and seat techniques were attempted with few positive results. This led to more aggressive techniques to eliminate the slab action of the concrete pavement where the pavement would be broken or rubblized into pieces typically less than 12 inches. Since the first rubblizing project in 1990, policy, procedures, and specifications have evolved to the point that rubblization is the mainstream option in dealing with problematic concrete pavements. This report summarizes the performance of several interstate rubblizing projects in Illinois by analyzing available data in Illinois Department of Transportation’s pavement management system. Condition rating survey data allowed the serviceability of these projects to be evaluated by surface mix types and asphalt performance grades. Traffic in the form of 18,000 lb equivalent single axle loads was determined for the projects to evaluate fatigue and rutting as well as compare section performance to the design procedure. The research team reviewed plans, design procedures, and specifications to determine best practices and identify where improvements might be made. Data showed that the use of stone matrix asphalt surface mixtures and mixes using PGXX-28 asphalt binders provides improved performance. Overall, rubblizing has shown good to excellent performance. To provide additional life with improved performance, recommendations include adopting softer asphalt grades, increasing the use of stone matrix asphalt, and improving procedures for protecting culverts.

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FATIGUE TESTS OF COMPOSITE DECKS WITH MCL CONNECTORS. The Hong Kong Institute of Steel Construction, December 2022. http://dx.doi.org/10.18057/ijasc.2022.18.4.7.

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Full-scale fatigue tests were performed on three composite decks with the MCL (modified clothoid) connectors to investigate their fatigue performance. Fatigue life and failure mode of the composite bridge decks were explored by measuring the specimens with three different stress amplitudes. The deflection, strain, carrying capacity, and stiffness degradation of the composite decks were measured and analyzed in the test. In addition, parameter analysis was performed using finite-element method in this study. Results showed that the mechanical performance of the composite decks accorded with the plane-section assumption under constant amplitude load, and the fatigue failure mode of the composite decks was the local fracture of the bottom steel plate. The stiffness degradation law and S-N curve were obtained in this study. Moreover, the concrete slab depth had a remarkable effect on the fatigue performance of the composite decks.

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PERFORMANCE OPTIMIZATION OF A STEEL-UHPC COMPOSITE ORTHOTROPIC BRIDGE WITH INTELLIGENT ALGORITHM. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.160.

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To address the problems of pavement damage and fatigue cracking of orthotropic steel deck (OSD) in bridges, an innovative composite bridge deck composed of OSD with open ribs and ultra-high performance concrete (UHPC) layer was proposed. Firstly, the stress responses of fatigue-prone details in the composite bridge deck were investigated by refined two-scale finite element analysis. The results show that the rib-to-deck joint can achieve an infinite fatigue life, while the floorbeam detail of rib-tofloorbeam joint indicates finite fatigue life. Then, response surface models of stress ranges of fatigue details and structure weight were derived via both the central composite design and response surface method. Finally, to improve the fatigue performance for achieving an infinite fatigue life under relatively low structure weight, the multi-objective optimization was executed by an Improved Non-dominated Sorting Genetic Algorithm (NSGA-II). The obtained Pareto front shows that there is a strong competition between the stress range of fatigue-prone detail and structure weight.

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