Work on the pull-out of anchors based on carbon fibers when arranging external reinforcement systems

2019 ◽  
pp. 29-34
Keyword(s):  
Carbon Fibers ◽  
Experimental Studies ◽  
Breaking Load ◽  
The Body ◽  
Pull Out ◽  
External Reinforcement ◽  
Concrete Body ◽  
The Moment ◽  
Two Stages ◽  
The Impact

Reliable anchoring of carbon reinforcement elements into the body of the structure is one of the most important aspects when designing the strengthening of reinforced concrete structures with the system of external reinforcement based on composite materials. The use of carbon fiber anchoring elements in this case is confirmed by numerous tests, but there are no methodological provisions for the calculation and design of these anchors at the moment. Special experimental studies of the parameters of anchors and their effect on the bearing capacity of the anchorage have been conducted for this purpose. The tests were carried out in two stages, during the experiments the breaking load, the size of the concrete pull-out cone, as well as the nature of the destruction of the anchor were recorded. In addition, the length of the anchorage in the concrete body, the pull-out forces, the maximum deformations of the anchor and the length of the anchorage when introducing the anchor fibers in the external reinforcement system have been defined. According to the results of the experiments, the analysis of the results, in particular, various schemes of destruction of anchors and the impact of the depth of the anchor on them, its diameter, as well as the type of binders was carried out.

Shear Behavior Of Anchors On The Basis Of Carbon Fiber At External Reinforcement

2019 ◽  
pp. 59-64
Keyword(s):  
Carbon Fiber ◽  
Bearing Capacity ◽  
Carbon Fibers ◽  
Experimental Studies ◽  
Shear Forces ◽  
External Reinforcement ◽  
Concrete Body ◽  
Improve Calculation ◽  
Analysis Of Results ◽  
The Impact

In systems of external reinforcement on the basis of carbon fibers used for strengthening concrete structures, special attention should be paid to the anchoring of carbon reinforcement elements. Taking into account their installation in the external reinforcement system in the reinforced structure, the anchoring elements can work on the shear. At the same time, the nature of such operatioj as a whole is insufficiently studied, which raises many questions both about their calculation and their design. In order to improve calculation and design methods of carbon anchors, special experimental studies of the parameters of anchors and their impact on the bearing capacity of the anchor fastening were carried out. These studies relate to the length of the anchorage in the concrete body, maximum shear forces, ultimate deformations of the anchor etc. According to the results of the experiments conducted, the analysis of results obtained was performed, in particular, various schemes of destruction of anchors were analyzed and the impact of the depth of the anchor, its diameter of the anchor, as well as the type of binder on the degree of theirdestruction were studied.

Calculation Of Carbon Fiber Anchors For Pull-Out And Shear When Installing External Reinforcement Systems

2020 ◽  
pp. 4-8
Keyword(s):  
Composite Materials ◽  
Carbon Fibers ◽  
Experimental Studies ◽  
The Body ◽  
Carbon Fibres ◽  
Calculation Methods ◽  
Regulatory Documents ◽  
Pull Out ◽  
External Reinforcement ◽  
Concrete Elements

The operation of external reinforcement systems based on carbon fibers when strengthening normal and inclined sections of bending reinforced concrete elements depends largely on the anchoring to the body of the reinforced structure. In addition to adhesion, one of the options for ensuring the required level of anchoring of external reinforcement is the installation of anchoring elements, including those based on carbon fibers. This article discusses the calculation of anchors based on carbon fibres used in the arrangement of the external reinforcement system. Two principles of anchor arrangement operation are highlighted: for shear and for pull-out. Separate design provisions have been developed for each, taking into account the parameters of anchoring elements and the nature of the destruction obtained during experimental studies. The proposed calculation methods are based on experimental studies of both bending elements reinforced by external reinforcement systems and directly anchoring elements. In addition, the development of these methods takes into account the provisions available in the regulatory documents on the calculation of anchors and composite materials.

scholarly journals Analytical and Experimental Analysis of a Free Link in Contact with a Granular Medium

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Dan B. Marghitu ◽  
Seung Lee
Keyword(s):  
Granular Medium ◽  
Stopping Time ◽  
The Body ◽  
Resistance Force ◽  
Time Interval ◽  
The Moment ◽  
Static Resistance ◽  
The Impact ◽  
Resistance Forces ◽  
Empirical Approaches

In this study, the experimental and the simulation results for a planar free link impacting a granular medium are analyzed. The resistance force of the granular medium on the body from the moment of the impact until the body stops is very important. Horizontal and vertical static resistance forces developed by theoretical and empirical approaches are considered. The penetrating depth of the impacting end of the free link increases with the increase of the initial impacting velocity. We define the stopping time as the time interval from the moment of impact until the vertical velocity of the link end is zero. The stopping time of the end decreases as the initial velocity increases. The faster the end of the link impacts the surface of the granular medium, the sooner it will come to a stop. This phenomenon involves how rapidly a free link strikes the granular medium and how it slows down upon contact.

NEW CORONOVIRUS INFECTION: CLINICAL AND PATHOGENETIC ASPECTS OF COVID-19 IN PREGNANT WOMEN

2021 ◽  
pp. 57-62
Author(s):  
Allakhyarov D.Z. ◽  
Petrov Yu.A. ◽  
Chernavsky V.V.
Keyword(s):  
Pregnant Women ◽  
The Body ◽  
World Health ◽  
Upper Respiratory Tract ◽  
Global Pandemic ◽  
High Prevalence ◽  
Coronavirus Infection ◽  
The Moment ◽  
Health Organization ◽  
The Impact

This article presents reviews of literature sources on the clinical and pathogenetic aspects of the course of a new coronovirus infection in pregnant women, in order to analyze the features of the course of COVID-19 in pregnant women and to assess the impact of infection on the body of a woman and a fetus. Pregnancy is a special physiological condition, during which a number of changes occur in the body, not only in the hormonal status, but also in the immune system. The urgency of this problem is due to the high prevalence of new coronavirus infection among the population. On March 12, 2020, the World Health Organization (WHO), as a result of the dynamic development of the epidemic in many countries and continents, declared a global pandemic of the contagious disease COVID-19 caused by the SARS-CoV-2 virus. According to available studies, pregnant women are more susceptible to a more severe course of infectious diseases affecting the upper respiratory tract. According to various studies, a new coronavirus infection can lead to premature birth, miscarriage, and preeclampsia. Separate studies show increased mortality in pregnant women diagnosed with COVID-19. The SARS-CoV-2 virus does not have a direct teratogenic effect on the fetus, but it can indirectly lead to harmful effects on the developing organism. Special attention should be paid to the issue of vaccination of pregnant women against a new coronavirus infection, at the moment there is no accurate data on the effect of the vaccine on the body of the pregnant woman and the fetus. In this regard, the question of the impact of a new coronavirus infection on the course of pregnancy has become relevant.

scholarly journals The FRP and TRC strengthening of the masonry structures

2019 ◽  
Vol 97 ◽  
pp. 02041
Author(s):  
Arkady Granovsky ◽  
Oleg Simakov ◽  
Bulat Dzhamuev
Keyword(s):  
Cross Section ◽  
Carbon Fibers ◽  
Ultimate Load ◽  
Experimental Studies ◽  
Masonry Structures ◽  
Test Results ◽  
Load Bearing Capacity ◽  
Site Specific ◽  
Section Size ◽  
External Reinforcement

The use of external reinforcement based on carbon fibers is technically and economically justified to strengthen concrete structures, which is confirmed by years of experience. The use of this method of reinforcement for masonry structures has significantly less history and, accordingly, experience. However, experimental and site specific efficacy of the use of external reinforcement in the amplification of the pillars of masonry by the device holder has been proven. The experiments of strengthening of a brickwork carried out earlier, as well as the developed theory of calculation, concern application of a full-bodied brick. Given the volume of construction of large-format ceramic stone, the task of strengthening structures from it becomes more urgent every year. In order to solve this problem, the present experimental studies were carried out – experimental studies of the clip effect on the fragments of brickwork with the strengthening of the external reinforcement system based on carbon fibers. In addition to studies of the influence of the size of bricks and the presence of voids, there was a study of the possibility of strengthening the samples with a cross-section size ratio of more than 2. In this case, carbon through anchors were mounted in the Central part of the samples. The test results obtained characters of destruction of specimens, the ultimate load-bearing capacity, made the appropriate conclusions.

scholarly journals The Impact of Time of Day on Energy Expenditure: Implications for Long-Term Energy Balance

Nutrients ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2383 ◽  
Author(s):  
Shaw ◽  
Leung ◽  
Jong ◽  
Coates ◽  
Davis ◽  
...  
Keyword(s):  
Energy Balance ◽  
Energy Expenditure ◽  
Energy Intake ◽  
Experimental Studies ◽  
Time Of Day ◽  
Circadian System ◽  
The Body ◽  
Energy Regulation ◽  
Meal Timing ◽  
The Impact

There is evidence to indicate that the central biological clock (i.e., our endogenous circadian system) plays a role in physiological processes in the body that impact energy regulation and metabolism. Cross-sectional data suggest that energy consumption later in the day and during the night is associated with weight gain. These findings have led to speculation that when, as well as what, we eat may be important for maintaining energy balance. Emerging literature suggests that prioritising energy intake to earlier during the day may help with body weight maintenance. Evidence from tightly controlled acute experimental studies indicates a disparity in the body’s ability to utilise (expend) energy equally across the day and night. Energy expenditure both at rest (resting metabolic rate) and after eating (thermic effect of food) is typically more efficient earlier during the day. In this review, we discuss the key evidence for a circadian pattern in energy utilisation and balance, which depends on meal timing. Whilst there is limited evidence that simply prioritising energy intake to earlier in the day is an effective strategy for weight loss, we highlight the potential benefits of considering the role of meal timing for improving metabolic health and energy balance. This review demonstrates that to advance our understanding of the contribution of the endogenous circadian system toward energy balance, targeted studies that utilise appropriate methodologies are required that focus on meal timing and frequency.

scholarly journals Integrated Bioinformatics Data Analysis and Experimental Studies Reveals Prognostic Significance of ALDH Family in Endometria Cancer

2021 ◽  
Author(s):  
Zhou-Tong Dai ◽  
Yuan Xiang ◽  
Xing-Hua Liao
Keyword(s):  
Cell Lines ◽  
Cox Regression ◽  
Prognostic Significance ◽  
Experimental Studies ◽  
Female Reproductive Tract ◽  
The Body ◽  
Mouse Tumor ◽  
The Impact

Abstract Background Uterine Corpus Endometrial Cancer (UCEC) is one of the three common malignant tumors of the female reproductive tract. According to reports, the cure rate of early UCEC can reach 95%. Therefore, the development of prognostic markers will help UCEC patients to find the disease earlier and develop treatment earlier. The ALDH family was first discovered to be the essential gene of the ethanol metabolism pathway in the body. Recent studies have shown that ALDH can participate in the regulation of cancer. Methods We used the gene profile data of 33 cancers in the TCGA database to analyze the expression and survival of the ALDH family. GO, KEGG, PPI multiple functional analysis was used to predict the regulatory role of ALDH family in cancer. In addition, using CCK-8, colony formation, nude mouse tumor formation and other methods, the in vitro function of UCEC cancer cell lines was tested to further confirm the key role of ALDH2 expression in the proliferation of UCEC cell lines. Finally, Lasso and Cox regression methods were used to establish an overall survival prognosis model based on ALDH2 expression. Result In our research, we explored the expression of ALDH family in 33 cancers. It was found that ALDH2 was abnormally expressed in UCEC. Besides, in vivo and in vitro experiments were conducted to explore the effect of ALDH2 expression on the proliferation of UCEC cell lines. Meanwhile, the change of its expression is not due to gene mutations, but is regulated by miR-135-3p. At the same time, the impact of ALDH2 changes on the survival of UCEC patients is deeply discussed. Finally, a nomogram for predicting survival was constructed, with a C-index of 0.798 and AUC of 0.764. Conclusion This study suggests that ALDH2 may play a crucial role in UCEC progression and has the potential as a prognostic biomarker of UCEC.

scholarly journals Application of Conductive Materials to Asphalt Pavement

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Hai Viet Vo ◽  
Dae-Wook Park
Keyword(s):  
Carbon Fibers ◽  
Asphalt Concrete ◽  
Thermal Testing ◽  
Snow Melting ◽  
Heating Efficiency ◽  
Preservation Method ◽  
Concrete Body ◽  
Conductive Additives ◽  
The Impact ◽  
Actual Test

Snow-melting pavement technique is an advanced preservation method, which can prevent the forming of snow or ice on the pavement surface by increasing the temperature using an embedded heating system. The main scope of this study is to evaluate the impact of conductive additives on the heating efficiency. The electrical resistivity and thermal conductivity were considered to investigate effects of conductive additives, graphite, and carbon fibers on the snow-melting ability of asphalt mixtures. Also, the distribution of the conductive additives within the asphalt concrete body was investigated by microstructural imaging. An actual test was applied to simulate realistic heating for an asphalt concrete mixture. Thermal testing indicated that graphite and carbon fibers improve the snow-melting ability of asphalt mixes and their combination is more effective than when used alone. As observed in the microstructural image, carbon fibers show a long-range connecting effect among graphite conductive clusters and gather in bundles when added excessively. According to the actual test, adding the conductive additives helps improve snow-melting efficiency by shortening processing time and raising the surface temperature.

scholarly journals EFFECT OF PROBIOTIC "LACTOBACTERIN-TK2" ON IMMUNOBIOLOGICAL STATUS OF NEWBORN CALVES IN THE THERAPEUTIC AND PROPHYLACTIC OF GASTROINTESTINAL DISEASES

2020 ◽  
Vol 1 (383) ◽  
pp. 26-32
Author(s):  
T. K. Boranbayeva ◽  
Zh. K.Tulemissova ◽  
S. Ozkaya ◽  
D. M. Khussainov
Keyword(s):  
Complete Recovery ◽  
Gastrointestinal Diseases ◽  
The Body ◽  
Modern World ◽  
Nonspecific Resistance ◽  
Alkaline Phospha ◽  
Newborn Calves ◽  
The Moment ◽  
The Impact ◽  
Adaptive Reactions

In recent decades, the loss of newborn calves occurs mainly from non-infectious diseases. It is established that in the process of growth and development, especially after birth, the animal has to experience the action of anthropogenic environmental factors that cause various kinds of adaptive reactions of the body. Currently, probiotic drugs are increasingly evaluated not only for their antimicrobial action but also for the characteristics of the impact on the body and its microbiota in the development of the need to strengthen the immune response, in the treatment and treatment of calf diarrhoea. It should be noted that in the modern world, a special place is occupied by studies of lactic acid bacteria associated with the development of biological products with probiotic function. The article presents the results of studying the therapeutic and prophylactic effect of the probiotic drug "Lactobacterin-TK2" in gastrointestinal diseases of newborn calves and its effect on the immune and biological status. According to the results of the study, it was found that daily feeding of the probiotic drug "Lactobacterin-TK2" to newborn calves from the moment of birth 2 times a day for 10 days increases the nonspecific resistance of the body and the safety of calves. Haematological and biochemical analysis of experimental groups of calves showed a faster normalisation of the level of alkaline phospha-tase, glucose, urea, magnesium, iron, potassium, calcium, and phosphorus, which also indicates a complete recovery.

Inter-Relationship of Body Disease and Psychological Disorder

2016 ◽  
pp. 47-52
Author(s):  
Donald W. Winnicott
Keyword(s):  
Emotional Development ◽  
The Body ◽  
Psychological Disorder ◽  
Psychological States ◽  
Body Tissues ◽  
The Moment ◽  
Relationship Of ◽  
The Impact

In this chapter, Winnicott summarises diseases of the soma (body), which are in origin hereditary, congenital, intake deficiency, accident, infestation and infection, and the effect on the body tissues of psychological states. He then summarises illness of the psyche, which for Winnicott is clinically a disorder of emotional development. He summarises again the neuroses, psychoses, and schizophrenia, and adds that these distinctions between psyche and soma then enable him to make interconnections between the two, leaving out for the moment the impact of the environment on each.

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