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Journal articles on the topic 'Circular Strength'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Lee, Swoo-Heon, Kyung-Jae Shin, So-Yeong Kim, and Hee-Du Lee. "Numerical Study on the Deformation Behavior of Longitudinal Plate-to-High-Strength Circular Hollow-Section X-Joints under Axial Load." Applied Sciences 9, no. 19 (2019): 3999. http://dx.doi.org/10.3390/app9193999.

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This study aims to investigate the joint strength of longitudinal plate-to-high-strength steel circular hollow-section X-type joints under plate axial load. The material properties of high-strength steel with nominal yield strengths of 460, 650, 900, and 1100 MPa were used for parametric analysis. The variables for analysis were ratios of chord diameter to thickness, plate width to chord diameter, and utilization. To determine the capacity of connections, the joint strengths using a deformation limit and a strength limit were considered and compared with American Institute of Steel Constructio

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2

Queiroz Junior, F. O., and B. Horowitz. "Shear strength of hollow circular sections." Revista IBRACON de Estruturas e Materiais 9, no. 2 (2016): 214–25. http://dx.doi.org/10.1590/s1983-41952016000200004.

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ABSTRACT The number of buildings higher than 30 floors has shown remarkable growth; many of them are supported on foundations of hollow circular piles. This increasing of height of constructions causes an increment of the shear stresses that are transmitted to their foundations, however these elements are more shear critical due to the hollow core. Most of the existing codes are based on shear models for rectangular sections, and guidelines for assessment of shear strength of members with hollow circular cross sections are practically non-existent. This study evaluates, on a comparative basis,

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3

Yousefi, Amir M., James BP Lim, Asraf Uzzaman, Ying Lian, G. Charles Clifton, and Ben Young. "Design of cold-formed stainless steel lipped channel sections with web openings subjected to web crippling under end-one-flange loading condition." Advances in Structural Engineering 20, no. 7 (2016): 1024–45. http://dx.doi.org/10.1177/1369433216670170.

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This article presents a numerical investigation on the web crippling strength of cold-formed stainless steel lipped channel sections with circular web openings under end-one-flange loading condition. In order to take into account the influence of the circular web openings, a parametric study involving 1992 finite element analyses was performed, covering duplex EN1.4462, austenitic EN1.4404 and ferritic EN1.4003 stainless steel grades; from the results of the parametric study, strength reduction factor equations are proposed. The web crippling strengths predicted by the reduction factor equatio

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4

Qi, Kang. "Aseismic Performance Analysis of High-Strength Concrete Circular Pier." Applied Mechanics and Materials 431 (October 2013): 161–66. http://dx.doi.org/10.4028/www.scientific.net/amm.431.161.

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Circular pier are widely used in bridge substructure. Strength and ductility are two important indicators reflect its aseismic performance. Based on the analysis of complete bending moment-curvature curve curvature, bending strength and ductility on reinforced concrete circular pier cross-section, this paper analyzes the aseismic performance of high-strength concrete circular pier. And it can provide reference for using high strength concrete more reasonable.

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5

Song, Sheng-zhi, and Jian-Jun Wei. "Residual Static Strength of Tubular T-Joints with Fatigue Surface Cracks." Open Mechanical Engineering Journal 9, no. 1 (2015): 1–6. http://dx.doi.org/10.2174/1874155x01509010001.

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To study the influence of surface fatigue cracks on the static strength of circular tubular T-joints, experimental tests on four full-scale circular tubular T-joints are carried out. Firstly, surface fatigue cracks are prefabricated by fatigue test in three circular tubular T-joints. Thereafter, experimental tests on the static strength of all the circular tubular T-joints with and without fatigue cracks under axial tension are carried out. Through the comparative analysis, the influences of the fatigue crack on the failure mode and the static strength of circular tubular T-joints are conclude

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6

Fahad Resan, Sa'ad. "EXPERIMENTAL INVESTIGATION OF CIRCULAR ALUMINUM COLUMNS ENHANCED." University of Thi-Qar Journal for Engineering Sciences 6, no. 1 (2015): 1–15. http://dx.doi.org/10.31663/utjes.v6i1.70.

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In structural engineering, introducing an efficient structural elements with high ratio of strength or ductility to weight is a challenge.This paper is presenting and developing aluminum columns having circular hollow section strengthened with CFRP possess the highest specific (divided -by weight) mechanical properties to be advantageous in lightweight and space limited structures .The structural performance of these columns was investigated experimentally by using different strengthening orient styles and CFRP piling layers. The column specimens were subjected to uniform axial compression. Th

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7

Le, Hoang An. "Evaluation of Confining Pressure Models for Circular Concrete-Filled Steel Tube Short Columns under Concentric Loading." Engineering, Technology & Applied Science Research 13, no. 1 (2023): 10181–85. http://dx.doi.org/10.48084/etasr.5537.

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It is well known that the confinement effect provided by the steel tube significantly increases the strength and ductility of circular Concrete Filled Steel Tube (CFST) columns under concentric loading. The lateral pressure is an important factor to calculate the strength enhancement of CFST columns. To reliably predict the ultimate strength of circular CFST columns, many models have been developed for predicting the lateral pressure due to the confinement effect. This paper aims to evaluate some of these confining pressure models. The values of the compressive strength of confined concrete an

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8

Teixeira, P. W. G. N., C. E. M. Maffei, and M. C. Guazzelli. "Shear strength of reinforced concrete circular cross-section beams." Revista IBRACON de Estruturas e Materiais 5, no. 6 (2012): 781–97. http://dx.doi.org/10.1590/s1983-41952012000600004.

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A proposed adequation of NBR 6118, Item 7.4, related to shear strength of reinforced concrete beams is presented with aims to application on circular cross-section. The actual expressions are most suitable to rectangular cross-section and some misleading occurs when applied to circular sections at determination of VRd2, Vc and Vsw, as consequence of bw (beam width) and d (effective depth) definitions as well as the real effectiveness of circular stirrups. The proposed adequation is based on extensive bibliographic review and practical experience with a great number of infrastructure elements,

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9

IWAKI, Ryo, Hikaru AKIYAMA, Takeji OKADA, and Toshiyuki SHIOYA. "Shear strength of reinforced concrete circular slabs." Doboku Gakkai Ronbunshu, no. 360 (1985): 155–64. http://dx.doi.org/10.2208/jscej.1985.360_155.

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10

Lee, Minsun, and Thomas H. K. Kang. "Flexural strength of circular concrete-filled tubes." Advances in Computational Design 1, no. 4 (2016): 297–313. http://dx.doi.org/10.12989/acd.2016.1.4.297.

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11

Cardinale, G. F., and C. J. Robinson. "Fracture strength measurement of filament assisted CVD polycrystalline diamond films." Journal of Materials Research 7, no. 6 (1992): 1432–37. http://dx.doi.org/10.1557/jmr.1992.1432.

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The fracture strength of polycrystalline diamond films deposited by filament assisted chemical vapor deposition in the thickness range of 3.5 to 160 μm is investigated. Using a burst pressure technique, the fracture strengths of circular diamond film specimens are calculated. An average fracture strength of 730 MPa for nine samples was computed. This value is in good agreement with published strengths of microwave plasma deposited diamond films, comparable to other high strength materials, and within an order of magnitude of the fracture strength of bulk natural diamond. The average fracture s

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12

Zhou, Ying Wu, Li Li Sui, Feng Xing, and Ling Yi Wu. "A Developed Strength Model for FRP Confined Circular Concrete Columns Based on a Most Updated and Comprehensive Test Database." Applied Mechanics and Materials 275-277 (January 2013): 1364–69. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.1364.

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This paper develops a new advanced strength model for circular columns retrofitted with fiber reinforced polymer (FRP) based on a newly collected test database which is so far the most updated and comprehensive one and has contained more than 800 axial compression test results of FRP confined circular concrete columns. This paper first reviews some existing design-oriented strength models and then provides an in-depth comparison between experimental test results and models predictions. The comparison results indicated that more or less deficiency exists when these models were extended to predi

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13

Ho, V. C., T. H. Nguyen, T. Q. Nguyen, and D. D. Nguyen. "Application of Neural Networks for the Estimation of the Shear Strength of Circular RC Columns." Engineering, Technology & Applied Science Research 12, no. 6 (2022): 9409–13. http://dx.doi.org/10.48084/etasr.5245.

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This study aims to develop Artificial Neural Networks (ANNs) for predicting the shear strength of circular Reinforced Concrete (RC) columns. A set of 156 experimental data samples of various circular RC columns were utilized to establish the ANN model. The performance results of the ANN model show that it predicts the shear strength of circular RC columns accurately with a high coefficient of determination (0.99) and a small root-mean-square error (4.6kN). The result comparison reveals that the proposed ANN model can predict the shear strength of the columns more accurately than the existing e

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14

Zhou, Feng, and Ben Young. "Compressive strengths of concrete-filled double-skin (circular hollow section outer and square hollow section inner) aluminium tubular sections." Advances in Structural Engineering 22, no. 11 (2019): 2418–34. http://dx.doi.org/10.1177/1369433219842381.

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Experimental and numerical investigations of concrete-filled double-skin aluminium stub column with a circular hollow section as the outer skin and a square hollow section as the inner skin are presented in this article. A test program was carried out to study the influences of aluminium tube geometric dimensions and concrete strength on structural performance and strength of composite columns. A series of composite columns was tested on outer circular hollow section tubes and inner square hollow section tubes; the spaces between them had been filled with concrete of different nominal cylinder

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15

Al-Shather, Luay M. "NEURAL NETWORK PREDICTION OF CONFINED PEAK STRESSES OF RC COLUMNS." Kufa Journal of Engineering 7, no. 3 (2016): 80–95. http://dx.doi.org/10.30572/2018/kje/731203.

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The research presents ANN ("Artificial Neural Networks") estimation of confined peak strength for R.C columns. The modeling of the strength of reinforced concrete columns by uses of the (FEM) finite element method gets many difficulties, starting in geometric representation down to nonlinearities due to loads. The use of neural networks trained well can give us a model that can be utilized as an alternative and successful model for those columns. Experimental sets of data for concrete of square and circular concrete columns were gathered from many researches to develop an Artificial Neural Net

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16

Thomason, James. "The Influence of Fibre Cross Section Shape and Fibre Surface Roughness on Composite Micromechanics." Micro 3, no. 1 (2023): 353–68. http://dx.doi.org/10.3390/micro3010024.

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Many of the carbon and natural fibres used in composite reinforcement have a non-circular cross section. Recently non-circular, or flat, cross section glass fibre products have become commercially available. This paper explores the potential effects that such non-circular fibre cross section shapes may have on the micromechanics of stress transfer at the composite fibre–matrix interface and the resulting changes in composite strength performance. Analytical modelling is used to show how the critical fibre length in composites with non-circular fibres is always less when compared to circular fi

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17

Mr. Mohamed Meera Maidheen, Ms. S. Bharathi, Dr. A.M. Arunmohan, Mr. Palanikumar, and Paulraj T. "Experiment Study on Strength of Concrete using Nanosilica." International Research Journal on Advanced Engineering Hub (IRJAEH) 2, no. 02 (2024): 51–56. http://dx.doi.org/10.47392/irjaeh.2024.0011.

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In recent times, the retrofitting of existing columns has become indispensable, necessitating the use of Carbon Fiber Reinforced Polymers (CFRPs) to fortify reinforced concrete columns. This application has led to notable enhancements in both strength and stability. Research, encompassing both experimental and theoretical approaches, has delved into the performance of concrete confined with CFRPs, particularly focusing on circular columns under concentric loading conditions. The findings from these studies indicate that CFRP confinement is more effective in circular columns compared to square

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18

SUSUKI, Takumi, and Masae KIDO. "COMPARISON BETWEEN SUPERPOSED STRENGTH AND ULTIMATE FLEXURAL STRENGTH OF CIRCULAR CFT SECTION." Journal of Structural and Construction Engineering (Transactions of AIJ) 87, no. 798 (2022): 833–44. http://dx.doi.org/10.3130/aijs.87.833.

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19

Li, Bo, and Zhankuan Zhang. "Effect of dynamic yield strength of circular saw blade on laser shock tensioning process." BioResources 12, no. 4 (2017): 9313–25. http://dx.doi.org/10.15376/biores.12.4.9313-9325.

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A laser shock tensioning process is proposed in this work for circular saw blades. To explore the tensioning stress formation mechanism of the laser shock tensioning process, a theoretical model was built based on a finite element method utilizing reasonable simplifications and assumptions. By comparing theoretical analysis and the measured results, the theoretical model proved to be correct and the laser shock tensioning process proved feasible. The effect of the dynamic yield strength of the circular saw blades on the laser shock tensioning process was studied. Simulation results showed that

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20

Ahmad E, Eladawi. "The Effect of Stacking Sequence and Ply Orientation with Central Hole on Tensile Behavior of Glass Fiber-polyester Composite." IgMin Research 2, no. 7 (2024): 590–96. http://dx.doi.org/10.61927/igmin221.

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An experimental investigation was carried out to study the effect of circular cross-holes on the failure behavior of unidirectional glass fiber reinforced with unsaturated polyester resin composites, varying cross-ply laminates that were subjected to axial tensile load. This paper deals with the effects of the circular notch and the number of plies on nominal tensile and net tensile strengths. Tensile strengths were investigated for composites with cross-ply([0/90]. [90°/0°/90°] and [0°/90°/0°].90°), orientation and varying the laminate layers with a central hole, and effects of volume fractio

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21

Palanivelu, Sangeetha, Dhinagaran Moorthy, Gobinaath Subramani, and Jeevan Dhayanithi. "Strength enhancement of cold-formed steel tubular column using GFRP strip subjected to axial compression." Gradjevinski materijali i konstrukcije 64, no. 4 (2021): 251–60. http://dx.doi.org/10.5937/grmk2104251p.

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The experimental and analytical evaluation of externally reinforced square and circular cold-formed steel tubular columns with GFRP strips is presented in this study. Under axial compression, fourteen tubular columns with pinned support, seven square tubular sections, and seven circular hollow section columns with externally bonded GFRP strips at various points were tested to failure. The GFRP strips improved the load-carrying capacity of the columns according to the trial results. The GFRP strip at the ends and intermediate regions, with a clear spacing of 100 to 150 mm between the strips, ha

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22

Sharkova, Violetta Evgenyevna, and Vasily Nikolaevich Akhapkin. "The Use Method of Circular Training for the Development of Strength Abilities of Students of RTSAU in Classes on Basic Physical Culture." Development of education 5, no. 4 (2022): 69–73. http://dx.doi.org/10.31483/r-104397.

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The article discusses methodological recommendations and general principles of conducting classes on basic physical culture at the university using the method of circular training. The authors set a goal: to study the influence of the circular training method on the development of strength abilities of the muscles of the upper shoulder girdle and lower extremities in female students. To achieve the goal, the following methods were used: analysis of educational and methodological literature, pedagogical observation, pedagogical testing. It was assumed that the use of circular training using mod

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23

Dr., R. Rajkumar* Akkineni Surya Teja. "RETROFITTING OF CONCRETE CIRCULAR COLUMNS USING CFRP." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 6 (2016): 168–77. https://doi.org/10.5281/zenodo.54775.

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Structures of architectural importance present a number of challenges in restoration and retrofit, which limit the application of modern codes and building standards. Recommendations are desirable and necessary to ensure rational methods of analysis and repair methods appropriate to the cultural context. Retrofit specifically aims to enhance the structural capacities (strength, stiffness, ductility, stability and integrity) of a building that is found to be deficient or vulnerable. In the specific context of enhancing the resistance of a vulnerable building to earthquakes, the term seismic ret

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24

Roeder, Charles W., Dawn E. Lehman, and Erik Bishop. "Strength and Stiffness of Circular Concrete-Filled Tubes." Journal of Structural Engineering 136, no. 12 (2010): 1545–53. http://dx.doi.org/10.1061/(asce)st.1943-541x.0000263.

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25

Popov, L. V., A. V. Gusev, and E. M. Khaustov. "Strength evaluation of circular frames under dynamic loading." Chemical and Petroleum Engineering 29, no. 3 (1993): 142–43. http://dx.doi.org/10.1007/bf01149367.

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26

Matešan, D., J. Radnić, N. Grgić, and G. Baloević. "Strength capacity of simply supported circular concrete slab." Materialwissenschaft und Werkstofftechnik 44, no. 5 (2013): 416–22. http://dx.doi.org/10.1002/mawe.201300145.

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27

Waleed Kh. Hadi and May J. Hamoodi. "Experimental Study on Composite Beams with Circular Web Openings." University of Thi-Qar Journal for Engineering Sciences 5, no. 1 (2014): 43–54. http://dx.doi.org/10.31663/utjes.v5i1.611.

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The behavior of composite beams with circular web openings is described. Four composite beams comprising one control beam were tested. The perforated beams have six circular openings with various locations. Opening size was fixed (66.7% of the steel section web depth) while number of openings in each composite beam was varied. Deflections at midspan and at openings were observed. Cracking of concrete slab and behavior of each opening were explained in detail. Tests indicated that circular web opening reduced the strength of composite beams. The behavior of composite beams relatively unaffected

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28

Vedant, Kale, Khadse Nayan, Katke Chetan, Mohite Aditya, and Kukarni Vaibhav. "COMPARISON OF MECHANICAL PROPERTIES OF SPECIMEN MANUFACTURED BY CIRCULAR NOZZLE VS TRIANGULAR NOZZLE." Advancement in Mechanical Engineering and Technology 5, no. 2 (2022): 1–10. https://doi.org/10.5281/zenodo.6817527.

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<em>3D Printing is one of the most commonly used solid state Additive Manufacturing Process in the todays Industry 4.0. Fused Deposition Modelling is an extensively used method for printing the three dimensional objects. PLA being the most selective material which is cheap and having significant properties is widely used for 3D Printing. Generally Circular Nozzle is used for 3D Printing as it has proven to show better product quality results. However Research on different Nozzle Extrusion shapes is still in process. This Paper discusses the comparison between the Mechanical Properties of objec

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29

Huang, Kang, Song Bo Han, Rong De Yang, and Shun Xu. "Contact Model of Double Circular Arc Gear Based on Fractal Theory." Applied Mechanics and Materials 43 (December 2010): 414–19. http://dx.doi.org/10.4028/www.scientific.net/amm.43.414.

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Aiming at the problem that it is difficult to solve contact strength calculation of double circular arc gear with the method of traditional the Hertz contact theory and FEM, methods of fractal theory had been used to establish the contact model of double arc gear based on fractal theory, and an example of calculation was given away. This article results that it is feasible to calculate contact strength with fractal theory in the driving of concave convex meshing gear and this contact model of double circular arc gear based on fractal theory would provide a new way of the research of contact st

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GUDLURU, R. DINESH, and K. ELUMALAI J. "STUDY OF MECHANICAL PROPERTIES OF HOLLOW CIRCULAR TUBULAR SECTIONS WITH AND WITHOUT FRP." JournalNX - a Multidisciplinary Peer Reviewed Journal 3, no. 7 (2017): 106–11. https://doi.org/10.5281/zenodo.1420950.

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The present research concentrates about compare the behaviour of concrete filled FRP tubes under different grades of concrete. Evaluate the behaviour of concrete filled FRP tubes using central holes with and without an inner PVC pipe. To evaluate both fully and partially concrete filled FRP tubes attain the axial compressive strength, tensile load and Modulus of elasticity. Comparison of strengths for the above cases and suggesting the effectiveness of FRP. Compared with conventional concrete cylinders, FRP tubes filled with concrete attains a compressive strength, which is 87 % higher that of

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31

Nugraha, Mahendra Cahya, and Samsudi Samsudi. "The effect of the MIG welding technique on the tensible strength results for cross members making in electric cars with ST 60 materials." Journal of Engineering and Applied Technology 3, no. 2 (2022): 73–79. http://dx.doi.org/10.21831/jeatech.v3i2.51167.

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This study aims to determine the chemical composition and tensile strength of ST60 materials in MIG (Metal Inert Gas) welding for the manufacture of electric car cross members and to reveal the effect of the welding technique on the welding results. The material was medium carbon steel with a thickness of 5 mm for each. The welding was done with MIG welding using a single 90-degree V joint with a current of 150 A. The welding techniques were straight, circular, and zigzag. The results showed a significant effect in circular welding with the largest average of 152,314 kg/mm2, while straight wel

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32

Le, Hoang An. "A Numerical Study addressing the Stress Distribution in Circular Steel Tube Confined Concrete Columns considering Various Concrete Strengths." Engineering, Technology & Applied Science Research 13, no. 2 (2023): 10347–51. http://dx.doi.org/10.48084/etasr.5581.

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The axially compressive behavior of Steel Tube Confined Concrete (STCC) columns has been experimentally investigated by many researchers throughout the world. However, it is extremely complicated to measure the stresses of steel tubes and concrete core in real tests. Therefore, to investigate the fundamental behavior of STCC columns under axial compression, this paper presents a numerical study that explores the stress distribution in steel tubes and concrete core. The circular STCC columns with the use of Normal Strength Concrete (NSC), High Strength Concrete (HSC), and Ultra-High Strength Co

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33

Wang, Zhong Hou, Ning Zhang, De Min Dong, and Xi Jiang Chen. "Analysis of the Influence of Fillet Curves on Gear Bending Strength Based on Space Contact." Applied Mechanics and Materials 155-156 (February 2012): 1203–7. http://dx.doi.org/10.4028/www.scientific.net/amm.155-156.1203.

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An analytical method was presented on some pairs of gear teeth contacting each other at the same time. First, the software Pro/E is applied to establish two kinds of gear whose fillet curves are typical double circular and single circular respectively. Second, changes of meshing locations is made to get omni-directional contact analysis results. At last a conclusion was drawn that bending stress on dedendum double circular gear is 1.3~1.5 times bigger than that on dedendum single circular gear,that is dedendum single circular gear has better carrying capacity. The study provides a good method

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J. Kent Hsiao. "Bending-Axis Effects on Load-Moment (P-M) Interaction Diagrams for Circular Concrete Columns Using a Limited Number of Longitudinal Reinforcing Bars." Electronic Journal of Structural Engineering 12 (January 1, 2012): 10–16. http://dx.doi.org/10.56748/ejse.12147.

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A rectangular reinforced concrete column usually has a strong axis and a weak axis. Bending about the strong axis results in a larger bending strength; on the other hand, bending about the weak axis results in a smaller bending strength. Since longitudinal reinforcing bars are usually uniformly distributed around the perimeters of circular columns, there is no strong or weak axis being defined for circular reinforced concrete columns. As a result, bending-axis effects on circular concrete columns using a large number of longitudinal reinforcing bars have traditionally been neglected. However,

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Nakahara, Hiroyuki, Kazuhiro Uchida, and Yuto Yanai. "Test and Analysis for Shearing Behavior of Circular CFST Columns." Buildings 14, no. 12 (2024): 3871. https://doi.org/10.3390/buildings14123871.

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Concrete-filled steel tubular (CFST) structures are well known to possess high strength and ductility. CFST members are used under complex stress states, such as beam–columns, piers, caissons, or other foundation components. Recommendations for the design and construction of concrete-filled steel tubular (CFST) structures were published in 1997 and revised in 2008 in Japan. In the recommendations, calculation methods for the axial strength and flexural strength of CFST columns were established on the basis of experimental results of more than 400 specimens; however, the test results of the col

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Zhao, Di, Jigang Zhang, Ling Lu, Haizhi Liang, and Zhehao Ma. "The Strength in Axial Compression of Aluminum Alloy Tube Confined Concrete Columns with a Circular Hollow Section: Experimental Results." Buildings 12, no. 5 (2022): 699. http://dx.doi.org/10.3390/buildings12050699.

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Steel tube confined concrete (STCC) stub columns have great strength and facilitate construction. In this study, the axial compressive strength of an aluminum alloy tube confined concrete column with (ATCC-CHS) and without (ATCC) a circular hollow section was tested in laboratory experiments. The influence of concrete strength, diameter–thickness ratio and the hollow rate on the failure mode, ultimate compressive strength, strain, stiffness, constraint effects and ductility was quantified. The experiments showed that local buckling failure could be effectively delayed when the outer aluminum t

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37

Kim. "Strength Evaluation of T-type Tubular Joints for Circular Section Multi-Column Wind Towers." Journal of Korean Society of Steel Construction 27, no. 1 (2015): 119. http://dx.doi.org/10.7781/kjoss.2015.27.1.119.

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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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Janßen, Jan-Dirk, and Thomas Schanze. "Analysis and classification of ECG-waves and rhythms using circular statistics and vector strength." Current Directions in Biomedical Engineering 3, no. 2 (2017): 91–94. http://dx.doi.org/10.1515/cdbme-2017-0020.

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AbstractThe most common way to analyse heart rhythm is to calculate the RR-interval and the heart rate variability. For further evaluation, descriptive statistics are often used. Here we introduce a new and more natural heart rhythm analysis tool that is based on circular statistics and vector strength. Vector strength is a tool to measure the periodicity or lack of periodicity of a signal. We divide the signal into non-overlapping window segments and project the detected R-waves around the unit circle using the complex exponential function and the median RR-interval. In addition, we calculate

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Fan, Wen, Mao-hong Yu, Long-sheng Deng, Xianglin Peng, and Li-wei Chen. "New strength formulae for rock surrounding a circular opening." Canadian Geotechnical Journal 50, no. 7 (2013): 735–43. http://dx.doi.org/10.1139/cgj-2012-0001.

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In this paper, the unified strength theory proposed by Yu Mao-hong in 1991 is used to develop new strength formulae for rock surrounding a tunnel. The new formulae can be applied to an elastic–plastic material. The formulae have a series of expressions with the unified parameter, especially variations such as the well-known Kastner and Airy formulae, which are widely used in rock mechanics and engineering. These formulae are derived on the basis of the Mohr–Coulomb strength criterion. For the strength-weakening (plastic-softening) of geomaterials, the analytical solutions for the radius of the

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Lu, Yiyan, Tao Zhu, Shan Li, Weijie Li, and Na Li. "Axial Behaviour of Slender RC Circular Columns Strengthened with Circular CFST Jackets." Advances in Civil Engineering 2018 (September 12, 2018): 1–11. http://dx.doi.org/10.1155/2018/7923575.

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This paper investigates the axial behavior of slender reinforced concrete (RC) columns strengthened with concrete filled steel tube (CFST) jacketing technique. It is realized by pouring self-compacting concrete (SCC) into the gap between inner original slender RC columns and outer steel tubes. Nine specimens were prepared and tested to failure under axial compression: a control specimen without strengthening and eight specimens with heights ranging between 1240 and 2140 mm strengthened with CFST jacketing. Experimental variables included four different length-to-diameter (L/D) ratios, three di

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Kim, Jin-Doo, Tai-Ju Lee, Jae-Hoon Lee, Jeong-Yong Ryu, and Jong-Myoung Won. "Circular action treatment (CAT): a new strategy for mechanical treatment of old corrugated container I – effects of control parameters on paper strength." Nordic Pulp & Paper Research Journal 33, no. 2 (2018): 365–71. http://dx.doi.org/10.1515/npprj-2018-3026.

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Abstract Circular action treatment (CAT) was developed for improving the strength of paper made from old corrugated containers (OCCs). The effects of the revolution speed of the circular blade, number of passes, and consistency of the stock were studied for application to paper recycling. The slowness, water retention value (WRV), and strength of the paper increased with increasing revolution speed of the circular blades and the passing time without changing the fiber characteristics (length, width, and kink angle) due to the improvement in flexibility and hydration degree of hornified fibers.

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Behera, Ranjan K., SK Parida, and RR Das. "Three-dimensional adhesion failure analysis of the single lap joint having pre-embedded circular defects." Journal of Strain Analysis for Engineering Design 54, no. 5-6 (2019): 293–309. http://dx.doi.org/10.1177/0309324719867002.

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The present research aims to study the growth of the circular adhesion failure pre-existing at the interfaces of the strap adherend and the adhesive in a single lap joint. Three-dimensional nonlinear finite element analysis of adhesively bonded single lap joints made with high strength steel adherends under uniformly applied extension have been carried out. The interfacial stresses and strain energy release rate values, being indicative parameters, in the growth of the adhesion failures are computed in the vicinity of the pre-existing circular adhesion failure fronts when the load on single la

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Widiarsa, Ida Bagus Rai, and I. Nyoman Sutarja. "Strength Models of Axial Capacity of FRP-Confined Circular Concrete Columns." Applied Mechanics and Materials 845 (July 2016): 193–201. http://dx.doi.org/10.4028/www.scientific.net/amm.845.193.

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Several numbers of strength models of FRP-confined circular concrete columns have been published by several researchers. In this study, strength models were proposed based on experimental data. Nine existing FRP-confined strength models of column confinement were reviewed in this study and two forms of strength models of FRP-confined circular concrete columns were proposed. The models were proposed based on different number of experimental data collected from literature. Based on the number of experimental data, i.e. 64-, 106-, 156- and 192-, the strength models were developed. The performance

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Zhang, Zhenhao, Zanke Yang, Hesheng Li, and Weijun Yang. "Performance Analysis of the Structures Using Glass-Fiber-Reinforced-Polymer-Produced Hollow Internal Molds." Buildings 14, no. 5 (2024): 1319. http://dx.doi.org/10.3390/buildings14051319.

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Hollow structures reduce weight without compromising load-bearing capacity and are widely used. The new Glass-Fiber-Reinforced Polymer high-strength thin-walled inner mold simplifies internal cavity construction and boosts structural performance. This study first investigates the influence of a GFRP high-strength thin-walled circular tube on the cross-sectional load-carrying capacity of hollow slabs. Then, a formula for the bending load-carrying capacity of the section under the action of the tube is derived. The results indicate that when the height of the concrete compression zone meets cert

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Hana Hasnan, Nurul, Roszilah Hamid, and Siti Aminah Osman. "The Strength Index of Short and Slender Circular Concrete-Filled Steel Tube Columns." International Journal of Engineering & Technology 8, no. 1.2 (2019): 131–35. http://dx.doi.org/10.14419/ijet.v8i1.2.24884.

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The factors affecting the sectional capacity, also known as strength index (SI) of concrete-filled steel tube columns (CFSTC) are, among others, type of cross-section and slenderness ratio (L/D). This study is to determine the effects of slenderness ratio of short (L/D Â 3.4) and slender (L/D Â 10) circular CFSTC on the SI. Concentric load tests were conducted to determine the ultimate strength (Nue) of ten circular sections of short and slender CFSTC with ordinary Portland cement concrete (OPCC) and pozzolan concrete (PC) infills. The SI are determined using several design codes. Results show

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Nagasekhar, A. V., Carlos H. Cáceres, and Mark Easton. "Cross-Sectional Geometry and the Intermetallics Structure in a High Pressure Die Cast Mg-Al Alloy." Materials Science Forum 638-642 (January 2010): 1579–84. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.1579.

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Specimens of rectangular and circular cross section of a Mg-9Al binary alloy have been tensile tested and the cross section of undeformed specimens examined using scanning electron microscopy. The rectangular cross sections showed three scales in the cellular intermetallics network: coarse at the core, fine at the surface and very fine at the corners, whereas the circular ones showed only two, coarse at the core and fine at the surface. The specimens of rectangular cross section exhibited higher yield strength in comparison to the circular ones. Possible reasons for the observed increased stre

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Niranjan, Raja R., S. Junaid Kokan, R. Sathya Narayanan, S. Rajesh, C. Elanchezhian, and B. Vijaya Ramnath. "Properties and Performance Analysis of Woven Roving Composite Laminates for Automotive Panel Board Applications." Advanced Materials Research 683 (April 2013): 21–24. http://dx.doi.org/10.4028/www.scientific.net/amr.683.21.

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Now-a-days natural Fibers are employed in various engineering applications because of their high tensile strength, low thermal expansion, high strength to weight ratio and good corrosion resistance. In this paper, woven roving composite laminates are prepared to produce automotive panel boards. Even though, various methods are available for preparing composites like Pultrusion method, filament winding method and hand layup method, hand lay method is used in this paper. The bundles of woven roving are alkalized at concentration between 1.2 and 6% of NaoH. Then, the treated fibres with increased

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Zhao, Yi, Su-Seng Pang, and Chihdar Yang. "Correlation of Tensile and Bending Strength of Composites With a Circular Hole." Journal of Engineering Materials and Technology 118, no. 4 (1996): 542–47. http://dx.doi.org/10.1115/1.2805954.

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While significant studies have been conducted on composites containing a circular or an elliptic hole under tensile loading, few investigations have been reported on notched composites under bending due to the complex nature of the problem. In this paper, a correlation of strengths of orthotropic plates containing a circular hole under tension and bending has been proposed based on Lekhnitskii’s solutions for infinite width plates. Finite element analysis has been performed to verify the theoretical correlation. Uniaxial tension and four-point bending tests have also been conducted on Scotchpl

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Ketabdari, Hesam, Farzad Karimi, and Mahsa Rasouli. "Shear strength prediction of short circular reinforced-concrete columns using soft computing methods." Advances in Structural Engineering 23, no. 14 (2020): 3048–61. http://dx.doi.org/10.1177/1369433220927270.

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In this article, it has been aimed to predict the shear strength of short circular reinforced-concrete columns using the meta-heuristic algorithms. Based on the studies conducted so far, the parameters dominantly affecting the shear strength include axial force, longitudinal and transverse reinforcement, column dimension ratio, concrete compressive strength and ductility. In this respect, first, 200 numerical models of the short circular reinforced-concrete column incorporating various effective parameters so that a sufficient number of outputs could be provided, are analyzed by ABAQUS softwar

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