17 research outputs found

    Reinforcement of columns using different composite materials

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    The adoption in construction of composite materials made by combining two or more materials to produce a material with improved properties over the separate components has been steadily increasing over the past decades. In the past few years there have been advances in composite manufacturing technology, increased demand for sustainable and eco-friendly building materials, and the need for materials that are lightweight and easy for transportation. For these reason, architects and civil engineers incorporate composites into structural elements to achieve these desired goals and optimize the cost of construction. One of the most common composite materials that was introduced to the industry is fiber reinforced polymer (FRP), produced by combining fibers (carbon, glass, or aramid) with a polymer matrix (epoxy or polyester). FRP materials are lightweight, durable and corrosion resistant, which makes them ideal for use in a wide range of construction applications. This study aims to propose a comparison between four different methods as a viable solution to strengthen and reinforce column structures. The structural behavior of three different composite materials was investigated. One traditional concrete-steel column was tested in the experiment for comparison. The other three columns were reinforced using carbon fiber reinforced plastic (CFRP), glass fiber reinforced plastic (GFRP) and stainless steel respectively. The obtained experimental results were analyzed, and comparison of three different systems of reinforcement for strengthening columns with composite materials was performed

    Армирование колонн с использованием различных композитных материалов

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    The adoption in construction of composite materials made by combining two or more materials to produce a material with improved properties over the separate components has been steadily increasing over the past decades. In the past few years there have been advances in composite manufacturing technology, increased demand for sustainable and eco-friendly building materials, and the need for materials that are lightweight and easy for transportation. For these reason, architects and civil engineers incorporate composites into structural elements to achieve these desired goals and optimize the cost of construction. One of the most common composite materials that was introduced to the industry is fiber reinforced polymer (FRP), produced by combining fibers (carbon, glass, or aramid) with a polymer matrix (epoxy or polyester). FRP materials are lightweight, durable and corrosion resistant, which makes them ideal for use in a wide range of construction applications. This study aims to propose a comparison between four different methods as a viable solution to strengthen and reinforce column structures. The structural behavior of three different composite materials was investigated. One traditional concrete-steel column was tested in the experiment for comparison. The other three columns were reinforced using carbon fiber reinforced plastic (CFRP), glass fiber reinforced plastic (GFRP) and stainless steel respectively. The obtained experimental results were analyzed, and comparison of three different systems of reinforcement for strengthening columns with composite materials was performed.Внедрение в строительство композитных материалов, изготовленных путем объединения двух или более материалов с целью получения материала, обладающего улучшенными свойствами, по сравнению с отдельными компонентами, неуклонно растет в течение последних десятилетий. За это время произошел прогресс в технологии производства композитов, увеличился спрос на устойчивые и экологически чистые строительные материалы, а также потребность в материалах, являющихся легкими и удобными для транспортировки. По этой причине архитекторы и инженеры-строители включают композиты в конструктивные элементы для достижения желаемых целей и оптимизации стоимости строительства. Одним из наиболее распространенных композитных материалов, представленным в промышленности, является армированный волокнами полимер (FRP), полученный посредством объединения волокон (углерод, стекло или арамид) с полимерной матрицей (эпоксидная смола или полиэстер). Материалы FRP легкие, прочные и устойчивые к коррозии, что делает их идеальными для использования в самых разных областях строительства. Исследование нацелено на то, чтобы сравнить четыре различных метода в качестве жизнеспособного решения для укрепления и усиления конструкций колонн. Изучено структурное поведение трех различных композиционных материалов. В эксперименте для сравнения испытана одна традиционная бетонно-стальная колонна. Остальные три колонны усилены с использованием углепластика, стеклопластика и нержавеющей стали соответственно. Полученные экспериментальные результаты проанализированы, выполнено сравнение трех различных систем армирования для усиления колонн композитными материалами

    Bis(N-nitroso-N-pentylhydroxylaminato- 2O,O_)copper(II)

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    Crystal structure of chlorido{1-(2,3-dimethyl-5-oxido-1-phenyl-1H-pyrazol-2-ium-4-yl-κO)-2-[3-methyl-5-oxo-1-phenyl-4,5-dihydro-1H-pyrazol-4-ylidene-κO]hydrazin-1-ido-κN1}copper(II) from laboratory X-ray powder data

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    In the title compound, [Cu(C21H19N6O2)Cl], the CuII atom is in a slightly distorted square-planar coordination involving two O atoms from the pyrazolone rings [Cu—O = 2.088 (10) and 1.975 (10) Å], an N atom of the azo group [Cu—N = 2.048 (13) Å] and a chloride anion [Cu—Cl = 2.183 (5) Å]. The organic anions act as tridentate chelating ligands. The molecules stack in columns along the c axis

    Bis(N-nitroso-N-pentylhydroxylaminato-κ2O,O′)copper(II)

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    In the centrosymmetric title compound, [Cu(C5H11N2O2)2], the Cu2+ ion, located on an inversion centre (Wyckoff position 2b), is in a square-planar environment, surounded by four O atoms of the N—O groups of two N-nitroso-N-pentylhydroxylaminate ligands [Cu—O = 1.9042 (17) and 1.9095 (16) Å]. The hydroxylaminate monoanions are bidentate chelating ligands. The Cu2+ cations form stacks along [010], with intermolecular Cu...N contacts of 3.146 (2) and 3.653 (2) Å
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