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Artykuły w czasopismach na temat „Concrete columns”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 1 sierpnia 2024

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1

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 (April 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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Ali, A., Z. Soomro, S. Iqbal, N. Bhatti, and A. F. Abro. "Prediction of Corner Columns’ Load Capacity Using Composite Material Analogy." Engineering, Technology & Applied Science Research 8, no. 2 (April 19, 2018): 2745–49. http://dx.doi.org/10.48084/etasr.1879.

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There are numerous reasons for which concrete has become the most widely used construction material in buildings, one of them being its availability in different types, such as fiber-reinforced, lightweight, high strength, conventional and self-compacting concrete. This advantage is specially realized in high-rise building construction, where common construction practice is to use concretes of different types or strength classes in slabs and columns. Columns in such structures are generally made from concrete which is higher in compressive strength than the one used in floors or slabs. This ra

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Lei, Min, Zihao Wang, Penghui Li, Liyi Zeng, Hongyao Liu, Zhidong Zhang, and Huicheng Su. "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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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 (June 24, 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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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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Szmigiera, Elżbieta. "INFLUENCE OF CONCRETE AND FIBRE CONCRETE ON THE LOAD‐CARRYING CAPACITY AND DEFORMABILITY OF COMPOSITE STEEL‐CONCRETE COLUMNS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 13, no. 1 (March 31, 2007): 55–61. http://dx.doi.org/10.3846/13923730.2007.9636419.

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The report presents the results of laboratories’ tests on steel columns strengthened by concrete casing. During testing of steel I‐shape column the strength of concrete casing and the way of the column loading were parameters subjected to changes. The possibility of increasing load capacity of columns by strengthening the supporting zones was checked, too. On the basis of tests performed, it has been stated that there is a considerable effect of concrete casing on the performance and capacity of steel columns. Possibility of increasing the load capacity of columns by making heads of fibre conc

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7

Qi, Yue. "Experimental Research on Bearing Capacity of Concrete Columns with High Strength Concrete Core under Axial Compression Loading." Advanced Materials Research 479-481 (February 2012): 2041–45. http://dx.doi.org/10.4028/www.scientific.net/amr.479-481.2041.

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Based on experimental research on plain concrete columns with high strength concrete core, the formula to predict the bearing capacity of concrete columns with high strength concrete core under axial compression loading was brought forward in previous paper, in order to verify the formula whether right, axial compression test including 3 concrete columns with high strength concrete core and 1 ordinary reinforced concrete column were completed, and the failure characteristic was analyzed additionally. According to experimental results, it can be shown that the failure modes of concrete columns

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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 (February 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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9

Halding, Philip Skov. "Reduction of the Carbon Footprint of Precast Columns by Combining Normal and Light Aggregate Concrete." Buildings 12, no. 2 (February 15, 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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10

Marques, M. G., A. P. A. R. Liserre, R. B. Gomes, and G. N. Guimarães. "Analysis of the behavior of reinforced concrete columns strengthened with sleeve wedge bolts and a self compacting concrete layer." Revista IBRACON de Estruturas e Materiais 8, no. 2 (April 2015): 88–99. http://dx.doi.org/10.1590/s1983-41952015000200003.

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Strengthening of reinforced concrete columns by jacketing is one of the most common structural rehabilitation techniques in Brazil. For adequate performance, it is necessary, among others, to avoid detachment of the new concrete layer (strengthening material) from the old concrete substrate when the strengthened member is again in service conditions. This paper describes the test results of eight reinforced concrete rectangular columns subjected to combined compression and one-axis bending to evaluate the efficiency of using sleeve wedge bolts across the new concrete/old concrete interface to

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11

Pei, Weichang, Daiyu Wang, Xuan Wang, and Zhenyu Wang. "Axial monotonic and cyclic compressive behavior of square GFRP tube–confined steel-reinforced concrete composite columns." Advances in Structural Engineering 24, no. 1 (July 20, 2020): 25–41. http://dx.doi.org/10.1177/1369433220934557.

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Fiber-reinforced polymer tube–confined steel fiber–reinforced concrete column is a novel composite column proposed recently, which consists of a traditional steel-reinforced concrete column and an external glass fiber–reinforced plastic tube for lateral confinement. In order to investigate the axial compression behavior of steel fiber–reinforced concrete columns, a total of 16 square specimens were fabricated and tested under axial monotonic and cyclic compressive loading. Three different configurations of inner shaped steels, including cross-shaped, box-shaped with wielding, and box-shaped wi

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12

Ma, Li Jie, Jin Yu Zhang, and Shao Jie Wang. "The Seismic Performance Study of Steel Pipe Concrete Column in the Absence of Beam Floor System." Advanced Materials Research 446-449 (January 2012): 2331–35. http://dx.doi.org/10.4028/www.scientific.net/amr.446-449.2331.

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Architecture is the concrete columns with steel pipe flat floor slab, the 100mm × 100mm of steel pipe concrete column is in the center of the floor. The variation of moment and horizontal anti-force under horizontal displace of steel concrete columns are researched, and the steel columns working are analyzed, from that we can know steel concrete column in the slab-column structure has a good deformability under earthquake.

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13

Sun, Heng, and Bai Shou Li. "Finite Element Analysis of Uniaxial Compression of Glazed Hollow Bead of Recycled Concrete Short Columns." Advanced Materials Research 898 (February 2014): 399–402. http://dx.doi.org/10.4028/www.scientific.net/amr.898.399.

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For traditional ordinary concrete wall column prone to thermal bridges, posted outside the insulation board short life than the life of the building，in the glazed hollow bead of recycled concrete foundation with good thermal conductivity test and compressive strength of the proposed ,use glazed hollow bead of recycled concrete exterior wall column instead of the traditional ordinary concrete wall column ,and using the finite element software ANSYS simulation analysis the uniaxial compression of glazed hollow bead of recycled concrete short columns and ordinary concrete short columns. Comparati

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14

Sidik Hasibuan, Samsul Abdul Rahman. "Revitalizing Infrastructure: Assessing Concrete Jacketing for Reinforced Concrete Column Rehabilitation." International Journal of Innovative Research in Computer Science and Technology 12, no. 1 (January 2024): 40–44. http://dx.doi.org/10.55524/ijircst.2024.12.1.8.

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The rehabilitation of deteriorating civil engineering infrastructure, encompassing bridges, buildings, columns, beams, supporting beams, marine structures, and roads, presents a formidable challenge in contemporary engineering practice. As society's demand for upgraded infrastructure escalates, the imperative to address deteriorating structures becomes increasingly urgent. Consequently, the rehabilitation of existing infrastructure has been identified as a paramount concern warranting immediate attention. Among the myriad techniques employed, retrofitting columns with concrete jacketing stands

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15

Landović, Aleksandar, and Miroslav Bešević. "Experimental Research on Reinforced Concrete Columns Strengthened with Steel Jacket and Concrete Infill." Applied Sciences 11, no. 9 (April 29, 2021): 4043. http://dx.doi.org/10.3390/app11094043.

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Experimental research on axially compressed columns made from reinforced concrete (RC) and RC columns strengthened with a steel jacket and additional fill concrete is presented in this paper. A premade squared cross-section RC column was placed inside a steel tube, and then the space between the column and the tube was filled with additional concrete. A total of fourteen stub axially compressed columns, including nine strengthened specimens and five plain reinforced concrete specimens, were experimentally tested. The main parameter that was varied in the experiment was the compressive strength

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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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Lai, Zhi Peng, and Shao Hua Guo. "Mechanism Analysis on Concrete Column’s Recovery Strengthening." Advanced Materials Research 941-944 (June 2014): 707–11. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.707.

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This paper deals with the behavior of concrete columns actuated by SMA wires winding around the column’s cylindrical surface, when the concrete column are constrained and driven in circumferential direction by the SMA wires, the column’s ultimate bearing capacity and axial deformation are mainly studied. Both theoretical research and finite element simulation are carried out. The results indicate that, the SMA’s limited recovery in reverse transformation by heating can generate circumferential prestress, which will improve the concrete column’s ultimate bearing capacity and control its deforma

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18

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 (December 27, 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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19

Liu, Xue Feng, Qing Xin Ren, and Lian Guang Jia. "Temperature Field Analysis of Concrete Filled Steel Tube Reinforced Concrete Columns in Fire." Applied Mechanics and Materials 644-650 (September 2014): 5019–22. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.5019.

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In this paper, temperature field analysis of concrete filled steel tube reinforced concrete columns in fire has been carried on. A finite element model for concrete filled steel tube reinforced concrete columns in fire is developed by ABAQUS. The cross-sectional temperature field distribution regularity of concrete filled steel tube reinforced concrete columns in fire has been obtained. Parameter analysis such as fire duration time and steel ratio on the column section temperature field is conducted, and this provide the reference for the further analysis of concrete filled steel tube reinforc

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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 (June 30, 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 (June 30, 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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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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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 (July 20, 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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Tantrapongsaton, Warakorn, and Chayanon Hansapinyo. "Impact Response of Reinforced Concrete Columns with Different Axial Load under Low-Velocity Impact Loading." Key Engineering Materials 803 (May 2019): 322–30. http://dx.doi.org/10.4028/www.scientific.net/kem.803.322.

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Building collapses from the seismic pounding of two adjacent buildings have been found in many past earthquakes. For the two buildings with different story height, the pounding induces impact load and local stress at column mid-height where the provided column reinforcement is normally lesser than the column’s edge. This paper aims to investigate the impact responses of reinforced concrete columns with different axial load and shear capacity by using numerical simulation method. Sixteen reinforced concretes columns were subjected to an impact load created by dropping 300 kg hammer at the heigh

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Yang, Yong, Xing Du, Yunlong Yu, and Yongpu Pan. "Experimental study on the seismic performance of composite columns with an ultra-high-strength concrete-filled steel tube core." Advances in Structural Engineering 23, no. 4 (October 21, 2019): 794–809. http://dx.doi.org/10.1177/1369433219879805.

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The ultra-high-strength concrete-encased concrete-filled steel tube column consists of a concrete-filled steel tube core and a rectangle-shaped reinforced concrete encasement. This article presents the seismic performance analysis of ultra-high-strength concrete-encased concrete-filled steel tube columns subjected to cyclic loading. Based on the measured load-lateral displacement hysteresis curves of six ultra-high-strength concrete-encased concrete-filled steel tube columns and two conventional RC columns, the seismic behaviours, such as the ductility, energy dissipation, stiffness and load-b

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Li, Hongbing, Fangbo Wu, Liangtao Bu, Yong Liu, and Jiang Yao. "Study on the compression performance of steel reactive powder concrete columns." Advances in Structural Engineering 23, no. 10 (February 16, 2020): 2018–29. http://dx.doi.org/10.1177/1369433220903986.

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In this study, the mechanical properties and failure characteristics of steel reactive powder concrete columns with different strength grades were investigated through compression testing. Six steel reactive powder concrete columns were tested; three columns underwent axial compression testing and three columns underwent eccentric compression testing. The results of the axial compression testing showed that steel and reactive powder concrete could work cooperatively at the initial stage, and the final column failure mode was primarily splitting failure at the end of the column, with the format

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Yin, Zhan Zhong, Qiang Wang, Ya Xiong Liang, and Zong Rui Hu. "The Ultimate Bearing Capacity of Partial Concrete Encased Steel Strengthened Column." Applied Mechanics and Materials 215-216 (November 2012): 796–99. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.796.

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The finite element modes of composite columns were built. The nonlinear analysis of the common steel column and the partial concrete encased steel composite columns were conducted. The load-displacement curves were getting. The strength of partial concrete encased steel Strengthened columns was much higher than the common steel column. Finally, Construction design suggestions and theory study of the type of partial concrete encased steel composite columns are advanced according to the results of analysis and computer simulation.

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Lahoud, Antoine E. "Slenderness effects in high-strength concrete columns." Canadian Journal of Civil Engineering 18, no. 5 (October 1, 1991): 765–71. http://dx.doi.org/10.1139/l91-093.

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High-strength concretes are being increasingly used in the columns of high-rise buildings. Analytical studies of the slenderness effects in these columns have been very limited. The behavior of slender columns with normal- and high-strength concretes is studied using a finite element program. Differences and similarities in long-term and short-term behaviors between high-strength and normal-strength slender concrete columns are noted and discussed. Key words: columns, slenderness, high-strength concrete, creep, finite elements.

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More, Florence More Dattu Shanker, and Senthil Selvan Subramanian. "Experimental Investigation on the Axial Compressive Behaviour of Cold-Formed Steel-Concrete Composite Columns Infilled with Various Types of Fibre-Reinforced Concrete." Buildings 13, no. 1 (January 6, 2023): 151. http://dx.doi.org/10.3390/buildings13010151.

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The exceptional structural strength and low cost of steel-concrete composite columns make them a popular choice for civil engineering structures. Numerous forms of composite columns, including steel tubes filled with concrete, have been produced recently in response to various construction situations. Cold-formed steel tubular columns with concrete filling have higher strength and ductility due to their capacity to withstand inner buckling and postpone outward buckling. The objective of this research is to determine the ductile and strength performance of composite columns containing various f

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Nhabih, Hussein Talab, Ahmed M. Hussein, and Marwa Marza Salman. "Study a Structural Behavior of Eccentrically Loaded GFRP Reinforced Columns Made of Geopolymer Concrete." Civil Engineering Journal 6, no. 3 (March 1, 2020): 563–75. http://dx.doi.org/10.28991/cej-2020-03091492.

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This study investigated a modern composite material, which is a short geopolymer concrete column (GPCC) reinforced by GFRP bars. The structural performances of GPCC subjected to eccentric load were studied and compared to the normal strength concrete column (NSCC) reinforced by steel bars. In this study, the primary experimental parameters were the reinforcement bars types, load eccentricity, and concrete types. Seven short columns were tested: three normal strength concrete columns reinforced by steel bars, three geopolymer concrete columns reinforced by GFRP bars and one normal strength conc

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Nair, Anjaly, and Osama (Sam) Salem. "Experimental determination of the residual compressive strength of concrete columns subjected to different fire durations and load ratios." Journal of Structural Fire Engineering 11, no. 4 (July 27, 2020): 529–43. http://dx.doi.org/10.1108/jsfe-10-2019-0034.

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Purpose At elevated temperatures, concrete undergoes changes in its mechanical and thermal properties, which mainly cause degradation of strength and eventually may lead to the failure of the structure. Retrofitting is a desirable option to rehabilitate fire damaged concrete structures. However, to ensure safe reuse of fire-exposed buildings and to adopt proper retrofitting methods, it is essential to evaluate the residual load-bearing capacity of such fire-damaged reinforced concrete structures. The focus of the experimental study presented in this paper aims to investigate the fire performan

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Bao, Yanhong, Bowen Chen, and Lei Xu. "Analysis of Concrete-Filled Steel Tube Reinforced Concrete Column-Steel Reinforced Concrete Beam Plane Frame Structure Subjected to Fire." Advances in Civil Engineering 2021 (April 7, 2021): 1–12. http://dx.doi.org/10.1155/2021/6620030.

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The ABAQUS finite-element analysis platform was used to understand the mechanical behavior of concrete-filled steel tube reinforced concrete (CFSTRC) columns and steel reinforced concrete (SRC) beam plane frames under fire conditions. Thermal parameters and mechanical constitutive model of steel and concrete materials were reasonably selected, the correct boundary conditions were chosen, and a numerical model for the thermal mechanical coupling of CFSTRC columns and SRC beam plane frame structure was established. The finite-element model was verified from related experimental test results. The

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Liu, Jin Ming. "Construction Technology of Lift Slab with Concrete Filled Steel Tube Columns." Applied Mechanics and Materials 170-173 (May 2012): 3072–76. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.3072.

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Abstract. This paper discusses a lift slab building with concrete filled steel tube columns. Lift slab construction as a methodology has advanced on improvements in traditional lift slab construction technology. When concrete filled steel tube columns are used, the strength of the concrete in the tube is obviously enhanced by the hoop action derived from the steel tube. The section of the concrete filled steel tube column is smaller than the section of the reinforced concrete column, thus realizing cost savings in material and labor. Also, because the steel tube hasn’t been filled with concret

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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 (September 22, 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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Salam, Mahmood A., Qiyao Wang, and Jinbo Huang. "Experimental and Numerical Study on the Composite Column Behavior: Loess Soil Reinforced by Concrete-Stone Column." Civil Engineering Journal 8, no. 10 (October 1, 2022): 2022–37. http://dx.doi.org/10.28991/cej-2022-08-10-01.

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Stone columns are an effective approach to improving the bearing capacity of weak soils, which has led to increased interest in the improved soil method being further developed and expanded. In addition, enhancing the bearing capacity of stone columns has recently received great attention. This paper studies the effects of embedded concrete parts on the stone columns' bearing capacity and bulging failure. Moreover, arranging solutions to the problem of bulging failure and reduced bearing capacity of stone columns and understanding the stone columns' failure after reinforcement by comparing the

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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 (May 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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Bagus Rai Widiarsa, Ida, and Ida Bagus Dharma Giri. "Influence of shape modification and stirrups on the axial capacity of concrete columns." MATEC Web of Conferences 195 (2018): 02020. http://dx.doi.org/10.1051/matecconf/201819502020.

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Columns as an important element of building structures support loads that work on slabs and beams and deliver the loads to the foundation. Concrete columns can experience strength degradation due to several reasons such as having less concrete strength than designed due to construction error or environmental damage. To restore the strength capacity of the columns, rehabilitation or retrofitting methods with steel plates or Fibre-Reinforced-Polymer (FRP) sheets are generally applied. This method is effective if the shape of the column is rounded. However, the shape of the column in the field is

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Kim, Tae-Hoon, Young-Jin Kim, Hyeong-Taek Kang, and Hyun Mock Shin. "Performance assessment of reinforced concrete bridge columns using a damage index." Canadian Journal of Civil Engineering 34, no. 7 (July 1, 2007): 843–55. http://dx.doi.org/10.1139/l07-003.

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A procedure is presented for assessment of the performance of reinforced concrete bridge columns. Fourteen circular reinforced concrete bridge columns were tested under a constant axial load and a cyclically reversed horizontal load. A computer program, named RCAHEST (reinforced concrete analysis in higher evaluation system technology), was used to analyze these reinforced concrete structures. A damage index based on the predicted hysteretic behavior of a reinforced concrete bridge column was used. Damage indices aim to provide a means of quantifying numerically the performance level of reinfo

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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 (July 18, 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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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 (January 30, 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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Zhang, Hua Zhi, Fang Pan, Zhen Hua Zhang, and Cai Yun Cheng. "To Improve the Appearance Quality of Concrete Special-Shaped Frame Column." Applied Mechanics and Materials 351-352 (August 2013): 227–30. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.227.

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In order to meet the growing needs of people, many buildings are used in special-shaped frame column, but because of the size and shape of special-shaped columns and other causes of concrete appearance quality is not high, by the QC group activity, cause analysis of special-shaped frame column concrete surface defects, and how to guarantee and improve the appearance quality of concrete special-shaped columns is proposed to solve the method, to eliminate the common quality defects of concrete surface and special-shaped columns.

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Mhuder, Wathiq Jassim, and Samir M. Chassib. "Experimental Study of Strengthening of RC Columns with Steel Fiber Concrete." Materials Science Forum 1002 (July 2020): 551–64. http://dx.doi.org/10.4028/www.scientific.net/msf.1002.551.

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This study introduces an experimental program to investigate the performance of concrete wrapping jackets reinforced by steel fibers used for retrofitting of the square and circular RC columns under axial loads. Ten columns divided into two groups; the first group included seven square columns while the second group involved three circular columns. The experimental study included testing the columns with varied parameters such as cross-section shape, type and aspect ratio of steel fibres, jacket thickness, and using several techniques for retrofitting the column such as strengthening by plain

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Yu, Feng, Chaochao Feng, Shilong Wang, Wei Huang, Yuan Fang, and Shuangshuang Bu. "MECHANICAL PERFORMANCE OF RECYCLED AGGREGATE SELF-CONSOLIDATING CONCRETE COLUMN." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 27, no. 3 (March 22, 2021): 188–202. http://dx.doi.org/10.3846/jcem.2021.14117.

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The utilization of recycled concrete aggregate (RCA) can reduce the environmental impact and decreases the cost of concrete. In this study, a comprehensive assessment of self-consolidating concrete (SCC) using RCA as partial or total replacement of coarse aggregate was conducted. Recycled concrete aggregate self-consolidating concrete (RCA-SCC) mixtures with varied water-to-cement (W/C) ratios (0.28–0.46), sand-to-aggregate (S/A) ratios (48–52%), fly ash (FA) contents (20–40%), RCA replacement ratios (0–100%), and water reducer contents (0–1.5%) were designed and tested. 5 groups of the RCA-SC

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Swarnkar, Jagriti. "Examining Seismic Response for Rigid Building Frame Having Composite Column." International Journal for Research in Applied Science and Engineering Technology 10, no. 7 (July 31, 2022): 3647–53. http://dx.doi.org/10.22214/ijraset.2022.45821.

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Abstract: Concrete filled steel tubes are generally used in Beams, Columns, Piers and caissons for deep foundations. The steel tube functions as the formwork for casting the concrete and hence, construction cost is reduced. The prime focus of the present work is to study the behavior of RCC structure under the effect of seismic loads provided with composite columns. This research study comprises of seismic analysis with the design of rigid frame with Reinforced Concrete column, Concrete encased steel and steel tube encasing concrete columns. These cases are designed based on IS 1893:2016 using

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R, Ramasubramani. "Study on the Behavior of Axially Loaded Coconut Shell Concrete Column Using M-Sand in Its Place of R-Sand." ECS Transactions 107, no. 1 (April 24, 2022): 1723–35. http://dx.doi.org/10.1149/10701.1723ecst.

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In Current Construction Industry many developments are happening towards green concept,where the waste materials are reused to avoid the accumulation of Waste and reducing the conception or destroying the environment.In Line with the same green concept this study is done such that Manufacture Sand called as M-Sand has been used as the replacement for Fine Aggregate. Coconut Shell has been used as replacement for Coarse Aggregate. M-Sand are produced by crushing the rocks that are obtained from hills and mountains. The Coconut shell has been used as the aggregates for producing lightweight conc

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Hudoba, Igor. "Composite C-C Columns by Utilizing of UHPFRC." Key Engineering Materials 691 (May 2016): 108–18. http://dx.doi.org/10.4028/www.scientific.net/kem.691.108.

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Main advantage of composite concrete columns, in comparison with traditional reinforced concrete columns, is its increased load-bearing capacity by using of solid steel reinforcing core. Ordinary type of such a steel-concrete (S-C) composite column consists of normal concrete and different type of solid steel core. In last decades high quality concrete is more and more used for load-bearing structural members exposed compression like columns. Present knowledge level in the area of ultra-high quality of concrete open a new chance for utilization of this progressive structural material in concre

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Zhang, Xihong, Hong Hao, and Chao Li. "The effect of concrete shear key on the performance of segmental columns subjected to impact loading." Advances in Structural Engineering 20, no. 3 (July 28, 2016): 352–73. http://dx.doi.org/10.1177/1369433216650210.

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Conventional precast segmental columns with seismic resistance design consist of only flat concrete segments with prestress tendon. This is because friction between adjacent segments is sufficient to resist the lateral forces from earthquake-induced actions. However, the friction between segments is not necessarily sufficient to resist lateral impact loads such as vehicle impact the column might experience during its service life. This article investigates the effectiveness of using concrete shear key in segments of precast segmental column in resisting the lateral impact loading. The precast

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Kado, Bishir, Shahrin Mohammad, Yeong Huei Lee, Poi Ngian Shek, and Mariyana Aida Ab Kadir. "EXPERIMENTAL STUDY ON BEHAVIOR OF UNPROTECTED FOAMED CONCRETE FILLED STEEL HOLLOW COLUMN UNDER FIRE." Journal of Civil Engineering, Science and Technology 12, no. 2 (September 30, 2021): 189–202. http://dx.doi.org/10.33736/jcest.3983.2021.

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Reduction in self-weight and achievement of full fire resistance requirements are some of the important considerations in the design of high-rise structures. Lightweight concrete filled steel tube (CFST) column provides an alternative method to serve these purposes. Recent studies on lightweight CFST columns at ambient temperature have revealed that foamed concrete can be a beneficial and innovative alternative material. Hence, this study investigates the potential of using foamed concrete in circular hollow steel columns for improving fire resistance. A series of nine fire test on circular un

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Shehab, Hamdy, Ahmed Eisa, Ahmed Mohamed Wahba, Peter Sabol, and Dušan Katunský. "Strengthening of Reinforced Concrete Columns Using Ultra-High Performance Fiber-Reinforced Concrete Jacket." Buildings 13, no. 8 (August 9, 2023): 2036. http://dx.doi.org/10.3390/buildings13082036.

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The use of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) increased in the field of civil engineering throughout the last few decades. UHPFRC is being used considerably on a large scale in megastructure applications. High compressive and tensile strength permits reconstruction and optimization of the structural members. At the same time, its improved durability properties make it easier to extend the life of the design and can be used as thin layers, cladding, repairs, and column coverings. Although UHPC has an extremely high compressive strength, it exhibits very brittle fracture b

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Omar, M. Y. M., R. B. Gomes, and A. P. A. Reis. "Experimental analysis of reinforced concrete columns strengthened with Self-Compacting concrete." Revista IBRACON de Estruturas e Materiais 3, no. 3 (September 2010): 271–83. http://dx.doi.org/10.1590/s1983-41952010000300002.

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This paper presents the results of reinforced concrete columns strengthened by addition of a self-compacting concrete overlay at the compressed and at the tensioned face of the member, with and without addition of longitudinal steel bars. Eight columns were submit- ted to loading with an initial eccentricity of 60 mm . These columns had 120 mm x 250 mm of rectangular cross section, 2000 mm in length and four longitudinal reinforcement steel bars with 10 mm in diameter. Reference columns P1 and P2 were tested to failure without any type of rehabilitation. Columns P3 to P8 were loaded to a prede

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