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Artykuły w czasopismach na temat „Columns”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Melero Carnero, Laura. "Francisco Ríos Álvarez y su «Mirada en la Lengua»: estructura, temas e ideologías lingüísticas en sus Columnas sobre la lengua (CSL) en La Voz de Galicia." Revista de Investigación Lingüística 25 (December 31, 2022): 129–54. http://dx.doi.org/10.6018/ril.524511.

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This article analyses Francisco Ríos Álvarez’s newspaper columns. The aim is to define this columnist’s writing style and its evolution, as well as his linguistic ideology. The study is framed within a line of research that investigates a subgenre of journalistic column called language columns. These are journalistic texts regularly published in a written newspaper, signed by a person of renown and dealing with analyses of language usage (Marimón, 2019b: 13). In order to analyse columns by the said author, a corpus was compiled consisting of 44 texts selected from the three series of columns t

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VIRGENS, J. P., R. B. GOMES, L. M. TRAUTWEIN, G. N. GUIMARÃES, and A. P. R. VAZ. "Experimental analysis of eccentrically loaded reinforced concrete columns with an added jacket of self-compacting concrete." Revista IBRACON de Estruturas e Materiais 12, no. 2 (2019): 329–36. http://dx.doi.org/10.1590/s1983-41952019000200007.

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Abstract This paper presents the experimental study of eccentrically loaded reinforced concrete columns with an added 35 mm self-compacting concrete jacket attached to the column’s most compressed face using wedge bolts. Nine columns with a 2000 mm height were tested under compression and one-way bending until failure. Columns were denominated as original column (PO) with a cross section of 120 mm x 250 mm; reference column (PR) with a cross section of 155 mm x 250 mm, and seven columns with an initial cross section of 120 mm x 250 mm and later reinforced by the addition of 35 mm self-compacti

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3

Schmidt, Jon A. "Design of Mill Building Columns Using Notional Loads." Engineering Journal 38, no. 2 (2001): 90–99. http://dx.doi.org/10.62913/engj.v38i2.753.

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Structural engineers have long recognized that mill building columns constitute a unique design situation. These columns typically support both the roof of the building at the top and one or more crane rails at an intermediate elevation. They accomplish this by taking the form of one of four common configurations (Fisher, 1993): a uniform column with a cantilevered bracket, a stepped column, separate laced columns, or separate battened columns (Figure 1). The last three options involve the use of a stronger and stiffer column section below the crane rail elevation by providing a larger section

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Shaat, Amr, and Amir Fam. "Axial loading tests on short and long hollow structural steel columns retrofitted using carbon fibre reinforced polymers." Canadian Journal of Civil Engineering 33, no. 4 (2006): 458–70. http://dx.doi.org/10.1139/l05-042.

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This paper describes the behaviour of axially loaded short and long square hollow structural section (HSS) columns, strengthened with carbon fibre reinforced polymer (CFRP) sheets. Twenty-seven short-column and five long-column HSS specimens were tested. The effect of CFRP sheet orientation in the longitudinal and transverse directions was studied for short columns. For long columns, CFRP sheets were oriented in the longitudinal direction only. A maximum strength gain of 18% was achieved for short columns with two transverse CFRP layers. For long columns, the maximum strength gain of 23% was a

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5

Rahbar-Kelishami, Ahmad, Hossein Bahmanyar, and Zahra Hajamini. "A novel approach for calculating packed column height based on new correlation of mass transfer coefficient." Polish Journal of Chemical Technology 17, no. 1 (2015): 48–54. http://dx.doi.org/10.1515/pjct-2015-0008.

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Abstract The calculation of column’s height plays an important role in packed columns precise design. This research is based on experimentally measurement of mass transfer coefficients in different heights of packed column to predict its height. The objective of presented work is to introduce a novel conceptual method to predict column height via new correlation for mass transfer coefficient. As the mass transfer coefficient is decreased with increase of column height, the HTU’s are not constant figures along the column so this new approach is called increasing HTU’s. The results of the propos

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6

Luo, Wen Wen, Ying Min Li, Ni Na Zheng, and Na Chen. "Numerical Analysis of Seismic Behavior of Masonry Walls Confined by Precast Tie-Columns." Applied Mechanics and Materials 166-169 (May 2012): 2429–35. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.2429.

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In order to improve the seismic behavior of the rural masonry buildings and reduce the cost and be convenient for construction, a precast tie-column system was put forward, which was suitable for masonry buildings, constructed by fired common bricks or porous bricks. The uniaxial compression constitutive relation of brick masonry was used for simulating the precast tie-column. And this paper analyzed the difference of the seismic behavior of masonry walls which bearing different vertical compressive stress, and confined by cast-in-place tie-columns or precast tie-columns, and whether contain w

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Belakhdar, Ahmed Rafik, Mohamed Salah Dimia, and Mohamed Baghdadi. "Post-fire behavior of RC columns repaired with square hollow section steel tube and RC concrete jackets." Journal of Engineering and Exact Sciences 9, no. 6 (2023): 161456–01. http://dx.doi.org/10.18540/jcecvl9iss6pp161456-01e.

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This paper investigates numerically fire-exposed reinforced concrete (RC) columns. As a first step, the study examined the effects of exposing the columns to fire for 60 minutes according to the ISO 834 fire standard on the column's residual load-bearing capacity by considering some decisive geometrical parameters such as the column height and its cross-sectional area. The second step consisted of investigating the effectiveness of the strengthening technique utilized by incorporating composite jackets, considering different strengths of concrete, in order to improve the post-fire behavior of

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8

Ibraheem, Rawaa S., and Alaa H. Al-Zuhairi. "A Comparative Study on Behavior of RC Columns Strengthened by CFRP and Steel Jacket." E3S Web of Conferences 318 (2021): 03002. http://dx.doi.org/10.1051/e3sconf/202131803002.

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This paper studies the behavior of axially loaded RC columns which are confined with carbon fiber reinforced polymers’ sheet (CFRP) and steel jackets (SJ). The study is based on twelve axially loaded RC columns tested up to failure. It is divided into three schemes based on its strengthening type; each scheme has four columns. The main parameters in this study were the compressive strength of the concrete and steel reinforcement ratio. Furthermore, the results of the experimental test showed a substantial enhancement in the column's load-carrying capacity. When compared to the original columns

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9

Zacarese, Lawrence M. "A column about columns." Campus Security Report 21, no. 2 (2024): 1–3. http://dx.doi.org/10.1002/casr.31261.

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I was chatting with my youngest son the other day while driving him to wrestling practice and playing “Daddy Uber.” I mentioned to him that I needed to work on writing my column, and he asked me what it was about. I mentioned I had a few ideas, but there were so many things going on in higher education, many that I have written extensively about, that I wasn’t sure which direction I was headed yet. He suggested that I take a page out of John Grogan's book.

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Mostafa, I. Mostafa, S. Mahmoud Nabil, and A. Salem Fikry. "Experimental and Numerical Investigation on the Strengthening IPE Steel Column with Welded Steel Plates under Axial Load." Experimental and Numerical Investigation on the Strengthening IPE Steel Column with Welded Steel Plates under Axial Load 8, no. 10 (2023): 15. https://doi.org/10.5281/zenodo.10002739.

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It is possible to repair the I-shape steel columns in many historic bridges by welding steel plates to their flanges. However, after the column's reinforcing plates have been welded to them, welding residual stresses, initial imperfections and column load can all have a major impact on the strength of the column. A nominal axial resistance is the target for the steel column. The steel column won't be able to support the intended applied load under different conditions, such as changing the building's use from residential to public or storage (additional live loads), and strengthening is thus n

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Niu, Jiangang, Wenming Xu, Jingjun Li, and Jian Liang. "Influence of Cross-Sectional Shape on the Mechanical Properties of Concrete Canvas and CFRP-Reinforced Columns." Advances in Materials Science and Engineering 2021 (May 11, 2021): 1–14. http://dx.doi.org/10.1155/2021/5541587.

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Fiber-reinforced polymer (FRP) wrapping has become an attractive strengthening technique for concrete columns. However, the ingress of corrosion into the concrete through the gap of CFRP fiber greatly reduces the durability of concrete and the bearing capacity of specimens. Concrete canvas, a kind of corrosion-resistant and refractory material, is a promising method to enhance durability and carrying capacity. In this study, the concrete canvas (CC) and carbon fiber-reinforced polymer (CFRP) were used to jointly reinforce columns with square cross section, octagonal cross section, circular cro

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Rahmi, Yulita, Siti Aminah Osman, and Mohd Yazmil Md Yatim. "Performance Analysis of Structure with Variation in the Cross-sectional Shapes of RC Columns Using Base Isolation." Jurnal Kejuruteraan 37, no. 3 (2025): 1419–26. https://doi.org/10.17576/jkukm-2025-37(3)-26.

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Earthquakes are natural disasters that occur suddenly and pose significant risks to buildings. One of the most critical structural components in withstanding earthquake loads is the column. The shape of a column's cross-section can significantly affect its moment of inertia and the overall strength of the building structure. One effective method to enhance the seismic performance of a structure is through base isolation. This study aims to analyze columns with and without base isolation, utilizing both square and circular column designs. The objective is to determine how much the isolator can

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13

Alkareem Jebur, Abdullah A., Raid I. Khalel, and Dhiyaa H. Mohammed. "Behavior of Tied Short RCA Columns Strengthened with Basalt Fiber." IOP Conference Series: Earth and Environmental Science 1374, no. 1 (2024): 012074. http://dx.doi.org/10.1088/1755-1315/1374/1/012074.

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Abstract This article offers an experimental procedure to evaluate the validity of RC circular short columns with various replacement ratios of recycled coarse aggregate and strengthening with basalt fibers. In order to provide it, fifteen (15) short reinforcing concrete columns with transverse reinforcement (ties), two recycled coarse aggregate replacement ratios (50 and 100 %), and four ratios of basalt fibers (0.1, 0.2, 0.3, and 0.4%) were designed and loaded axially concentrically. The obtained experimental data is recorded and evaluated to improve the RC short column’s structural properti

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14

Al-Shwaiter, Abdullah, and Ziyad Al-Gaboby. "Behavior of Rubberized Concrete-Filled Square Steel Tube Under Axial Loading." Journal of Science and Technology 24, no. 1 (2019): 23–39. http://dx.doi.org/10.20428/jst.v24i1.1572.

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The purpose of this paper is to investigate the behavior of rubberized concrete-filled steel tube (RuCFST)analytically by using ABAQUS 6.12-1 software for square columns under axial loading. Twelve specimens modeled with various variables which are rubber content as replacement percentage from natural aggregate (0%, 5% and 15%), tube thickness (3mm and 6mm) and columns’ length (1.5m and 3.0m). The results showed an adoption model of RuCFST columns subjected to axial force in elastic and plastic properties of steel and concrete gives a good agreement between numerical and references experimenta

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Al-Shwaiter, Abdullah, and Ziyad Al-Gaboby. "Behavior of Rubberized Concrete-Filled Square Steel Tube Under Axial Loading." Journal of Science and Technology 24, no. 1 (2019): 23–39. http://dx.doi.org/10.20428/jst.24.1.2.

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The purpose of this paper is to investigate the behavior of rubberized concrete-filled steel tube (RuCFST)analytically by using ABAQUS 6.12-1 software for square columns under axial loading. Twelve specimens modeled with various variables which are rubber content as replacement percentage from natural aggregate (0%, 5% and 15%), tube thickness (3mm and 6mm) and columns’ length (1.5m and 3.0m). The results showed an adoption model of RuCFST columns subjected to axial force in elastic and plastic properties of steel and concrete gives a good agreement between numerical and references experimenta

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Zhang, Xun Zhong, Ru Heng Wang, and Wei Hu. "Analysis on Seismic Performance of Frame Columns Reinforced with Wing Walls." Applied Mechanics and Materials 166-169 (May 2012): 1691–95. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.1691.

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Through the ANSYS finite element method, the seismic performance of frame columns reinforced with wing walls has been analyzed, indicating that the wing wall reinforcement can effectively improve the lateral stiffness and remarkably increase the bearing capacity of columns. With the wing wall reinforcement, the envelop area of the column’s hysteresis curve increases, and the bearing capacity improves, however, the shrinking phenomena of the curve suggests that the ductility of the section reduces. When the centerline of the additional wing wall coincides with that of the original column, the h

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Zhang, Junzheng, Weisheng Xu, Jianjun Ye, and Xuexi Liu. "The Mechanical Properties of Reinforced Concrete Columns with Longitudinal Pre-Embedded Holes." Applied Sciences 15, no. 9 (2025): 5010. https://doi.org/10.3390/app15095010.

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While the longitudinal pre-embedded holes in a reinforced concrete column have a variety of beneficial functions during the whole life of the building, they have certain negative influences on the mechanical properties of the column. To investigate the influences of longitudinally pre-embedded holes on the mechanical properties of reinforced concrete (RC) columns, numerical simulations were conducted using the finite element software ABAQUS 2021 to analyze the effects of various parameters, including hole diameter, concrete strength, stirrup ratio, and slenderness ratio, on the mechanical beha

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Zaini, Muhammad Syamsul Imran, Muzamir Hasan, and Nuraini Yusuf. "Strength and Compressibility of Soft Clay Reinforced with Group Crushed Polypropylene Columns." CONSTRUCTION 4, no. 2 (2024): 186–92. http://dx.doi.org/10.15282/construction.v4i2.10737.

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The use of granular columns as soil reinforcement technique has proved useful in problems of foundation stability and settlement, as well as improving soft clay for foundation construction. The purpose of this study is to investigate the enhancement of shear strength of soft kaolin clay when it is reinforced with group crushed polypropylene (PP) columns. Since PP is a waste material, the cost of soil improvement can be reduced which currently was disposed totally in large quantity into landfill. In order to proceed the study, physical and mechanical properties of materials used that are kaolin

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Patel, Nishiben, Krishna R. Gupta, and Milind J. Umekar. "An Overview of Monolithic Column: Types, Parameters and Applications." Journal of Drug Delivery and Therapeutics 12, no. 4-S (2022): 223–31. http://dx.doi.org/10.22270/jddt.v12i4-s.5521.

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The column is the main component for chromatographic separation. Nowadays, monolithic columns are graining more popularity in the field of separation media for liquid chromatography. The monolith columns possess great potential as compared to the conventional packed column in terms of preparing complex mixtures. These columns provide various properties like higher permeability, high-efficiency fast separations, high flow rate with lower backpressure, fast mass transfer kinetics with a high binding capacity. It is categories into three columns and they are organic monolithic column, inorganic m

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Ahmed, Ali, Ahmed Mohammed Youssef Mohammed, and Koichi Maekawa. "Performance Comparison of High Strength Reinforced Concrete Circular and Square Columns Subjected to Flexural Controlled Cyclic Loading." Civil Engineering Journal 7, no. 1 (2021): 83–97. http://dx.doi.org/10.28991/cej-2021-03091639.

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In existing design practices selection of circular or square column shape mostly depends upon architectural needs rather than structural behavior. The behavior of equivalent area (circular and square), high strength reinforced concrete columns is reported to be same under monotonic loading conditions but their behavior under fatigue loading is not well-established. This paper presents the comparison of high strength reinforced concrete circular and square equivalent area columns’ performance (load-deflection behavior) under fatigue loading. Columns were casted in four configurations: square an

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Fenollosa, Ernesto, Iván Cabrera, Verónica Llopis, and Adolfo Alonso. "Non-linear Analysis of Slender High Strength Concrete Column." Civil Engineering Journal 5, no. 7 (2019): 1440–51. http://dx.doi.org/10.28991/cej-2019-03091343.

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This article shows the influence of axial force eccentricity on high strength concrete columns design. The behavior of columns made of normal, middle and high strength concrete with slenderness values between 20 and 60 under an eccentric axial force has been studied. Structural analysis has been developed by means of software which considers both geometrical and mechanical non-linearity. The sequence of points defined by increasing values of axial force and bending moment produced by eccentricity has been represented on the cross-section interaction diagram until failure for each tested column

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Nguyen Thai, Linh, Manh Nguyen Duc, and Ha Nguyen Hai. "Analysis of impacting factors for soil-cement column combined high strength geogrid." Transport and Communications Science Journal 72, no. 1 (2021): 9–15. http://dx.doi.org/10.47869/tcsj.72.1.2.

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Soil-cement column combined with geogrid on top or Geogrid Reinforced Pile Supported (GRPS), is used to construct structures on soft ground. Because of its high tensile capacity, the geogrid is spread on the top of the soil-cement column to form a soft transmission layer, increasing the capacity transferred to the columns, reducing a part of the load transmitted to the soft soil between the columns. The numerical analysis results of the GRPS with a high strength geogrid showed four major factors affecting transmission the efficacy of the column (Ef) and the tensile force of the geogrid includi

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Thanh-Quang-Khai Lam, Thi-Thuy-Trang Vo, and K. S. Sreekeshava. "Compressive Behaviour of Reinforced Concrete Columns Using Recycled Building Glass Instead of Sand Aggregate in Concrete." Journal of Building Material Science 7, no. 1 (2025): 1–19. https://doi.org/10.30564/jbms.v7i1.8253.

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Exploring alternative aggregates or recycled aggregates to substitute traditional concrete aggregates, particularly sand aggregates, which are becoming more limited and must comply with environmental protection standards, is essential. Research has explored various alternative materials to sand in concrete, including concrete from demolished buildings, and broken glass from projects, among others. Investigating the use of recycled broken glass to substitute sand aggregates and implementing this research in compression columns is crucial. This paper examines the compressive behavior of reinforc

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AlJallad, Sadjad Amir, and Haitham Al-Thairy. "EFFECT OF WEB OPENING ON THE AXIAL LOAD CAPACITY OF STEEL COLUMNS WITH COLD FORMED THIN WALLED SECTION (CFS)." Kufa Journal of Engineering 7, no. 3 (2016): 13–26. http://dx.doi.org/10.30572/2018/kje/731200.

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In this paper, an experimental study has been presented to investigate the effects of web opening on the behavior and failure of steel columns with cold formed thin walled sections (CFS) subjected to axial compressive load. Twenty small scale steel columns with cold formed box and channel sections and a total length of 500 mm have been considered in the experimental tests. Ten of the tested steel columns specimens have a box section with dimensions of (100×100×2) mm (height × width× thickness), and the other ten columns specimens have a channel sections with dimensions of (100×50×2) mm (height

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Propika, Jaka, Dita Kamarul Fitriyah, and Yanisfa Septiarsilia. "Analisa Perbandingan Kolom Komposit Inside Steel dan Outside Steel terhadap Kapasitas Tahanan Aksial dan Momen." Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia 5, no. 2 (2020): 62. http://dx.doi.org/10.33366/rekabuana.v5i2.1947.

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ABSTRAK Penggunaan kolom komposit telah banyak digunakan di berbagai bangunan bangunan tinggi. Dan pada umumnya, Kolom komposit dibagi menjadi 2 macam, yaitu kolom komposit inside steel dan outside steel dengan struktur baja terbungkus oleh beton disebut dengan kolom inside steel atau bisa saja disebut Concrete Encased Column. Sedangkan untuk baja yang berisi beton disebut dengan kolom outside steel atau juga disebut Concrete Filled Column. Penggunaan struktur kolom komposit outside steel sebagai kolom utama dalam mendukung beban lateral pada struktur rangka bangunan belum lazim digunakan dala

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Lei, Min, Zihao Wang, Penghui Li, et al. "Experimental Investigation on Short Concrete Columns Reinforced by Bamboo Scrimber under Axial Compression Loads." Advances in Civil Engineering 2020 (September 29, 2020): 1–12. http://dx.doi.org/10.1155/2020/8886384.

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The paper presents bamboo scrimber bars as a reinforcing material instead of steel reinforcement in low-strength concrete columns. Twelve short concrete columns with different reinforcements are tested under axial compression load to study the axial compressive behavior of short concrete columns reinforced by bamboo scrimber. Three columns are reinforced concrete columns, and the other nine columns are bamboo scrimber reinforced concrete columns. The failure process, bearing capacity, axial deformation, and strain of the specimens are compared and analyzed. The results show that the bonding pe

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Yarovyy, S., Y. Yarovyy, and D. Mazur. "DETERMINATION OF THE CALCULATED LENGTH OF THE COLUMNS TAKING INTO ACCOUNT THEIR FORM OF DEFORMATION AND UNEQUAL LOADING IN THE FRAME COMPOSITIOND." Scientific Bulletin of Building, no. 110 (June 27, 2024): 96–101. http://dx.doi.org/10.33042/2311-7257.2024.110.1.14.

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The coefficient of expansion of the columns, which are used in the warehouse of one-span frames with crane attachments, must depend on the shape of their deformation and the unequal attachment of the columns. At this time, the peculiarity of the current development of the frame is the fact that the most likely objectives can be achieved by only one column in the warehouse. If one of the columns (which has a heavy tap with a vantage) is subject to the maximum influx of constant force at the moment, then the longitudinal column of the same cut allows for the influx of significantly less force. T

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P., Mahakavi, P. Dinesh kumar S., Elamathi L., Mohammed Anees H., and Selva R. "EXPERIMENTAL STUDY ON MECHANICAL BEHAVIOUR OF CONCRETE COLUMN CONFINED WITH POLY VINYL CHLORIDE PIPES." International Journal of Engineering Research and Modern Education Special Issue, April 2017 (2017): 72–74. https://doi.org/10.5281/zenodo.570132.

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Columns are the most important elements of the structures, failure of one column in a critical location can cause a progressive collapse. PVC pipes has been used in recent years to strengthening the Reinforced concrete column members. Most of the research reported concerns testing specimens under concentric axial loads. In reality the loads on columns can be eccentric due to columns loacation (corner & edges columns) or due to construction errors. This paper presents the influence of PVC pipe on concrete columns carrying capacity of concentric and eccentric loads. Six high strength reinfor

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Redecki, Michał, and Bronisław Gosowski. "The influence of the torsional restraint of crane column brackets on their critical load capacity." MATEC Web of Conferences 262 (2019): 09009. http://dx.doi.org/10.1051/matecconf/201926209009.

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The paper presents the results of numerical parametric studies conducted on laterally restrained steel I-columns with a single stepped asymmetric change in their cross-section. Such elements are used as a part of the outermost columns in the transversal system of steel halls with cranes. The columns are usually braced along their length with wall girts, which in a properly structured hall system have a significant effect on the columns’ load bearing capacity and determine their axis of rotation. The main aim of the presented studies is to determine the impact of parameters, such as longitudina

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FERREIRA, D. B., R. B. GOMES, A. L. CARVALHO, and G. N. GUIMARÃES. "Behavior of reinforced concrete columns strenghtened by partial jacketing." Revista IBRACON de Estruturas e Materiais 9, no. 1 (2016): 1–21. http://dx.doi.org/10.1590/s1983-41952016000100002.

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This article presents the study of reinforced concrete columns strengthened using a partial jacket consisting of a 35mm self-compacting concrete layer added to its most compressed face and tested in combined compression and uniaxial bending until rupture. Wedge bolt connectors were used to increase bond at the interface between the two concrete layers of different ages. Seven 2000 mm long columns were tested. Two columns were cast monolithically and named PO (original column) e PR (reference column). The other five columns were strengthened using a new 35 mm thick self-compacting concrete laye

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Halding, Philip Skov. "Reduction of the Carbon Footprint of Precast Columns by Combining Normal and Light Aggregate Concrete." Buildings 12, no. 2 (2022): 215. http://dx.doi.org/10.3390/buildings12020215.

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To reduce the global emission of CO2 from the building industry, researchers, architects and manufacturers must consider new ways of constructing precast concrete buildings. Modern concrete columns and walls are not optimized to the applied load, and there is potential to save material. By creating a stronger column core and a lightweight concrete cover, it is possible to reduce the carbon footprint. A method is proposed to calculate such eccentrically loaded columns of two or more materials. The analytical method is developed for straight columns and columns with Entasis. Production of curved

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Li, Kai Wen, Zhi Yang Li, Xin Wan, and Fei Liu. "Non-Linear Numerical Simulation on Hysteretic Behavior of SRC Columns." Applied Mechanics and Materials 723 (January 2015): 382–86. http://dx.doi.org/10.4028/www.scientific.net/amm.723.382.

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In order to study the mechanics properties to of concrete columns with embedded steel, two groups contrasting analysis models referring to SRC column and RC column are established by using finite element software ABAQUS. Both Static and cycle force are conducted. Analytical results show that bearing capacity and deformation ability of steel embedded reinforced concrete columns (SRC) under static loading are obviously higher than those of the reinforced concrete column (RC). Under the cycle force, the hysteresis circles of the SRC columns are fuller than RC column. The capability of energy cons

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Liu, Shihao, Wenhua Ye, Peihuang Lou, Weifang Chen, Jungui Huang, and Lili Xiao. "Bionic Design for Column of Gantry Machining Center to Improve the Static and Dynamic Performance." Shock and Vibration 19, no. 4 (2012): 493–504. http://dx.doi.org/10.1155/2012/545931.

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In order to improve the machining accuracy of a gantry machining center, structural bionic design for column was conducted. Firstly, the bionic design method for stiffener plate structure was established based on distribution principles of gingko root system. The bionic design method was used to improve column structure of the gantry machining center, and three kinds of bionic columns were put forward. The finite element analysis on original and bionic columns indicates that the mass of the column with the best bionic stiffener plate structure is reduced by 2.74% and the first five order natur

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Wu, Jing, Fa Zhou Wang, Wen Yang, and Qing Jun Ding. "Load Carrying Capacity Analysis of Multi-Spiral Reinforced Concrete Column." Advanced Materials Research 150-151 (October 2010): 441–46. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.441.

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The behavior of confined concrete is highly dependent on the confinement type of transverse reinforcement, spiral hoops are generally believed to have better confined effect in concrete than rectangular hoops. It is verified through experiments and the oretical calculations that multi-spiral confined concrete columns have better mechanical properties than single spiral columns, the multi-spiral significantly increase the column’s strength, plasticity, ductility and anti-seismic capability. Based on the three-direction stress law of confined concrete, the load carrying capacity of the rectangul

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Hao, Chang Zheng, Mohd Reza Azmi, Mohd Yazmil Md. Yatim, and Ong Tze Sean. "The Effects of Plate Stiffeners on the Ultimate Load of Square Concrete-Filled Double-Skin Tubular (CFDST) Short Column." Jurnal Kejuruteraan 36, no. 5 (2024): 1795–803. http://dx.doi.org/10.17576/jkukm-2024-36(5)-01.

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This paper studies the effects of plate stiffeners on the ultimate load of square concrete-filled double-skin tubular (CFDST) short columns under axial compression. The study determines and compares the load-bearing capacity of concrete-filled steel tubular (CFST) short column, CFDST short column and CFDST short columns with plate stiffeners. To achieve these objectives, the researchers performed experimental tests on six composite column specimens: one CFST short column, one CFDST short column and four CFDST short columns with plate stiffeners. The stiffeners are welded to the inner surface o

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Thejarathnam, T., M. H. Prashanth, and Imran Kuttagola. "Study on the effectiveness of prefabricated cage system reinforcement in columns." IOP Conference Series: Earth and Environmental Science 1149, no. 1 (2023): 012010. http://dx.doi.org/10.1088/1755-1315/1149/1/012010.

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Abstract The concrete is the primary vertical load bearing component in a reinforced concrete column whereas the steel cage provides additional vertical load carrying capacity along with the confinement of core concrete. The research paper will focus on the performance of Prefabricated Cage System (PCS) Reinforcement in square columns. Eight columns were casted and tested, out of which two are rebar reinforced columns and six are PCS reinforced columns. There were two test groups, each group containing one rebar column and three PCS columns. In this study work is done to compare the performanc

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Goswami, A., and S. Deka. "Study of the Effect of Installation of Stone Columns on the Stability of Soil Slopes using Finite Element Method." IOP Conference Series: Materials Science and Engineering 1282, no. 1 (2023): 012020. http://dx.doi.org/10.1088/1757-899x/1282/1/012020.

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Abstract There are several ways to mitigate the failure of a soil slope. The installation of stone columns for this purpose, is easy as well as economical. As their strength is greater than that of soil, they disrupt the slip surfaces. Also being more porous, they dissipate the pore pressure generated in the soil in the vicinity of the stone columns to a certain extent. This paper illustrates 2D finite element analyses carried out to simulate the behavior of stone columns in cohesive soil using the computer program PLAXIS. Parametric study was conducted to analyze the effect of number, length

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Shukla, Shubham, and M. V. Waghmare. "Strengthening of RC Column Using GFRP." International Journal for Research in Applied Science and Engineering Technology 10, no. 3 (2022): 1217–24. http://dx.doi.org/10.22214/ijraset.2022.40866.

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Abstract: In construction industry, engineers try to find new, better, economical material. Today there are several new techniques observed in the industry. In recent years, the construction industry has seen an increasing demand to reinstate, rejuvenate, strengthen and upgrade existing concrete structures. This may be attributed to various causes such as environment degradation, design inadequacies, poor construction practices, lack of regular maintenance, revision of codes of practice, increase in loads and seismic conditions etc. One of the technique used is the wrapping of damaged and newl

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Krishna, Himanshu, and Prince Yadav. "Study the Seismic Behavior of Special Columns in Multi-Story (G+4) Building for Seismic Zone III." International Journal for Research in Applied Science and Engineering Technology 10, no. 8 (2022): 749–53. http://dx.doi.org/10.22214/ijraset.2022.46215.

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Abstract: Columns are RC building structural elements that are primarily subjected to axial load and moments as they transport them from the superstructure to the substructure. Columns of various shapes and sizes are used. Popular column shapes include square, rectangular, and circular columns, as well as L-shaped, T-shaped, and (+) shaped columns, which are uncommon but provide more interior space than commonly used column shapes. This study aims to examine the seismic performance of multistory G+4 buildings with Rectangular columns and building with specially shaped columns. According to IS

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Krishna, Himanshu. "Study the Behavior of Special Columns on Multi Storey Building for Seismic Ground Motions." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (2022): 2011–14. http://dx.doi.org/10.22214/ijraset.2022.45642.

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ABSTRACT: Columns are RC building structural elements that are primarily subjected to axial load and moments as they transport them from the superstructure to the substructure. Columns of various shapes and sizes are used. Popular column shapes include square, rectangular, and circular columns, as well as L-shaped, T-shaped, and (+) shaped columns, which are uncommon but provide more interior space than commonly used column shapes. This study aims to examine the seismic performance of multistorey G+10 buildings with Rectangular columns and building with specially shaped columns. According to I

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İnce, Elif Gökçe, and Fatih Mehmet Özkal. "Optimization of Structural Steel Used in Concrete-Encased Steel Composite Columns via Topology Optimization." Applied Sciences 14, no. 3 (2024): 1170. http://dx.doi.org/10.3390/app14031170.

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Concrete-encased steel composite columns are preferred for their exceptional ductility and strength, particularly in high-rise buildings. This research aims to enhance both the strength and ductility of these composite columns by increasing the height of the steel profile. Typically, hexagonal or circular openings, referred to as castellated elements, are incorporated into the steel profile to achieve this height increase. This study employed a topology optimization method to identify the ideal opening shape for the steel profile in concrete-encased steel composite columns. The analysis reveal

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Xu, Ying, and Bi Qin Dong. "An Industrialized Multi-Layer Precast Concrete Frame Building with Middle-Joint Beams and Columns." Advanced Materials Research 163-167 (December 2010): 1849–53. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.1849.

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An industrialized multi-layer precast concrete building with middle-joint beams and columns frame system has been developed by China VANKE CO., LTD. The building is the first industrialized multi-layer precast concrete building for experimental purpose in China. A middle-joint beams and columns method has been utilized with beams and columns split in the middle place. The whole frame structure is then integrated into a unity through precast beams, precast columns, and reliable cast-in-place column-column and beam-beam joints. This paper presents the key points and difficulties during the build

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Yusuf, Hamzah, Akhmad Azis, Sugiarto Badaruddin, Andi Muhammad Subhan Saiby, Zulvyah Faisal, and Zubair Saing. "Physical modeling of sand columns application in recharge reservoir to prevent seawater intrusion." Water Supply 22, no. 2 (2021): 2170–78. http://dx.doi.org/10.2166/ws.2021.365.

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Abstract This study aims to provide visual evidence by the physical simulation to demonstrate the sand column performance of a recharge reservoir to control seawater encroachment and confirm some previous studies. In this analysis, a two-dimensional sand tank illustrates the sand column's role in overcoming seawater intrusion. Besides using dyes, the sand tank is also fitted with sensors to observe the length of seawater penetration. Furthermore, the simulation using SEAWAT numerical modeling is used as a reference in this analysis. The criteria analyzed were the number of sand columns, the re

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Teddy, Livian, Gagoek Hardiman, N. Nuroji, and Sri Tudjono. "The New Method in Calculating Columns and Beams Dimensions That Meets Requirements of The Strong Column-Weak Beam and Non-Soft Story." Journal of Architectural Design and Urbanism 1, no. 2 (2019): 1. http://dx.doi.org/10.14710/jadu.v1i2.4492.

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Situated at an earthquake prone area, buildings planning in Indonesia must implement earthquake resistant building principles. One of these principles is determining dimensions of columns and beams in the process of architectural designing.This act eventually affects the behaviour of the strong column-weak beam and the probability of bending failure due to soft story. At present time, there are no simple rules architects can use in calculating the dimensions of beams and columns that meet the criteria for strong column-weak beam and non-soft story. This paper is an effort to provide an input t

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Li, Xiaozhong, Sumei Zhang, Yu Tao, and Bing Zhang. "Numerical Study on the Axial Compressive Behavior of Steel-Tube-Confined Concrete-Filled Steel Tubes." Materials 17, no. 1 (2023): 155. http://dx.doi.org/10.3390/ma17010155.

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To improve the concrete confinement and mechanical properties of concrete-filled steel tube (CFST) columns, a new configuration of steel-tube-confined concrete-filled steel tube (T-CFST) columns has recently been developed, in which an outer steel tube is employed externally, and the additional tube does not sustain the axial load directly. This preliminary experimental study revealed that, due to the effective concrete confinement by the outer steel tube, the T-CFST column achieves higher compressive strength and more ductile deformation compared to the CFST columns of the same steel ratio. I

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Yuan, Haofeng, Lichang Fang, and Shiji Song. "A Reinforcement-Learning-Based Multiple-Column Selection Strategy for Column Generation." Proceedings of the AAAI Conference on Artificial Intelligence 38, no. 8 (2024): 8209–16. http://dx.doi.org/10.1609/aaai.v38i8.28661.

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Column generation (CG) is one of the most successful approaches for solving large-scale linear programming (LP) problems. Given an LP with a prohibitively large number of variables (i.e., columns), the idea of CG is to explicitly consider only a subset of columns and iteratively add potential columns to improve the objective value. While adding the column with the most negative reduced cost can guarantee the convergence of CG, it has been shown that adding multiple columns per iteration rather than a single column can lead to faster convergence. However, it remains a challenge to design a mult

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Masia, Mark J., and Nigel G. Shrive. "Carbon fibre reinforced polymer wrapping for the rehabilitation of masonry columns." Canadian Journal of Civil Engineering 30, no. 4 (2003): 734–44. http://dx.doi.org/10.1139/l03-015.

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The use of carbon fibre reinforced polymer (CFRP) wrapping to strengthen existing cracked masonry columns was investigated experimentally. The study was aimed at quantifying the increase in strength that can be achieved and assessing the effect of column size on the strength increase. Eighteen columns were tested, with three different square cross-sectional sizes (290 mm × 290 mm, 390 mm × 390 mm, 490 mm × 490 mm) and two different types of clay masonry unit. Six columns were constructed in each size, two columns using unit type 1 and four columns using unit type 2. Strengthening was achieved

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Mohamed Sayed, Ahmed, Mohamed Mohamed Rashwan, and Mohamed Emad Helmy. "Experimental Behavior of Cracked Reinforced Concrete Columns Strengthened with Reinforced Concrete Jacketing." Materials 13, no. 12 (2020): 2832. http://dx.doi.org/10.3390/ma13122832.

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Reinforced concrete (RC) columns often need to be strengthened or rehabilitated to allow them to carry the loads applied to them. In previous studies, RC columns have been strengthened by jacketing, without considering the occurrence of cracking. In this study, the behavior of RC columns strengthened externally by jacketing after cracking is analyzed. The accuracy of the existing models was verified by analyzing the performance of fifteen RC columns with different cross-sections to determine the effect of new variables, such as the column size, amount of steel reinforcement, and whether the co

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Sivakumar, V., D. McKelvey, J. Graham, and D. Hughes. "Triaxial tests on model sand columns in clay." Canadian Geotechnical Journal 41, no. 2 (2004): 299–312. http://dx.doi.org/10.1139/t03-097.

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Vibro-stone columns can improve the bearing capacity and reduce the settlement of foundations. Their performance depends on the strength of the column material, reinforcement method of column installation, type of in situ soil, area replacement ratio, and column length. This paper examines the behaviour of small laboratory specimens of soft clay (undrained shear strength ≈ 30 kPa) reinforced with sand columns when tested under known boundary stress conditions. Two series of tests were carried out on kaolin specimens (diameter 100 mm, height 200 mm) in a triaxial cell. In the first series, spec

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Shendrik, V. A. "STRUCTURAL EVALUATION OF REINFORCED CONCRETE COLUMN WITH COMPOSITE GFRP SHELL -- A STRUCTURAL ELEMENTOF BRIDGE PIER." Russian Journal of Building Construction and Architecture, no. 2(50) (May 21, 2021): 74–84. http://dx.doi.org/10.36622/vstu.2021.50.2.006.

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Statement of the problem. It’s considered the problem of developing a methodology for structural evaluation of hybrid design - a reinforced concrete column combined with external composite GFRP (glass-fiber-reinforced-plastic) shell. This hybrid design is intended for bridge piers. Results. As a result of a study, theoretical relationships were formulated to determine the longitudinal and transverse stresses and relative deformations of hybrid column structural elements. The developed formulas take into account the cooperation of triaxial compressed concrete core and an anisotropic composite G

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