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Journal articles on the topic 'ISO-STANDARD FIRE CURVE'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Zha, Xiaoxiong, and Yang Zuo. "Finite Element Study of Container Structure under Normal and High Temperature." Mathematical Problems in Engineering 2016 (2016): 1–15. http://dx.doi.org/10.1155/2016/2652149.

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This paper does some research on the mechanical property of multilayer container structure under high temperature and gives some suggestions on how to make fire protection based on the performance-based fire design. Firstly, using the software of FDS (Fire Dynamics Simulator), the fire background and fire heating release curve are determined. Through the simulation, the actual temperature curves (of the top and bottom temperature curves of the middle, door, and corner position in the container) are obtained and compared with the standard temperature curve of ISO-834. Secondly, using the softwa

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2

Liu, Yong Jun, Chao Li, and When Jun Zhou. "Numerical Analysis on Tensile Properties of Grout-filled Splice Sleeve Rebars under ISO 834 Standard Fire." E3S Web of Conferences 38 (2018): 03036. http://dx.doi.org/10.1051/e3sconf/20183803036.

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This paper presents some numerical simulation results of tensile properties of reinforcing bars spliced by grout-filled coupling sleeves under fire conditions to identify the effect of load ratio on fire resistance time of spliced reinforcing bars, which provide a useful base for predicting structural behaviors of pre-cast reinforced concrete buildings in fires. A spliced rebar system investigated in this paper consists of two equal-diameter steel reinforcing bars with 25mm diameter and a straight coupling sleeve with 50mm outer and 45mm inner diameters. As a result, the thickness of grout bet

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Oliveira, Pedro N., Elza M. M. Fonseca, Raul D. S. G. Campilho, and Paulo A. G. Piloto. "Analytical Equations Applied to the Study of Steel Profiles under Fire According to Different Nominal Temperature-Time Curves." Mathematical and Computational Applications 26, no. 2 (2021): 48. http://dx.doi.org/10.3390/mca26020048.

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Some analytical methods are available for temperature evaluation in solid bodies. These methods can be used due to their simplicity and good results. The main goal of this work is to present the temperature calculation in different cross-sections of structural hot-rolled steel profiles (IPE, HEM, L, and UAP) using the lumped capacitance method and the simplified equation from Eurocode 3. The basis of the lumped capacitance method is that the temperature of the solid body is uniform at any given time instant during a heat transient process. The profiles were studied, subjected to the fire actio

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Huang, Yen-Chieh, Shin-Ku Lee, Chi-Chang Chan, and Shui-Jinn Wang. "Full-scale evaluation of fire-resistant building integrated photovoltaic systems with different installation positions of junction boxes." Indoor and Built Environment 27, no. 9 (2017): 1259–71. http://dx.doi.org/10.1177/1420326x17713256.

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Building integrated photovoltaic (BIPV) systems are a promising strategy to integrate photovoltaic (PV) systems with building materials to reduce construction costs and add aesthetic features. In this study, a fire test in accordance with ISO 834-1:1999, CNS 14803-2010 and ISO 3008:2007 to provide the standard heating curve was carried out to investigate the fire-resistant characteristics based on the breaking behaviour and surface temperature distribution of type I and type II BIPV modules. The BIPV modules tested have both open and hidden junction-box (J-box) designs, with the aim of reducin

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Yin, Zhi Xiang, Jia Peng Zhao, and Si Da Zhao. "Study on Performance of Kiewitt Single-Layer Spherical Reticulated Shell Structure under the Action of Fire." Applied Mechanics and Materials 488-489 (January 2014): 102–5. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.102.

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Under the condition of high temperature, steel basic mechanical property index such as strength, elastic modulus falls sharply. Once there is a fire, long-span reticulated shell has serious damage. This paper, taking Kiewitt reticulated spherical shell as an example, uses ISO - 834 standard temperature - time curve to simulate fire and analyze the distribution of temperature field calculation and mechanical. Analysis by using transient thermal analysis in ANSYS software. Through ANSYS software to analog fire resistant properties of reticulated shell under the action of local fire resistant pro

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Han, Lin-Hai, Lei Xu, and Xiao-Ling Zhao. "Tests and Analysis on the Temperature Field within Concrete Filled Steel Tubes with or without Protection Subjected to a Standard Fire." Advances in Structural Engineering 6, no. 2 (2003): 121–33. http://dx.doi.org/10.1260/136943303769013219.

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The temperature fields within twelve concrete filled steel tubular columns with or without fire protection when exposed to the ISO-834 standard fire curve (ISO-834, 1975) have been experimentally investigated and the results are presented in this paper. The main parameters varied in the tests are: (1)Sectional types, square and circular; (2) Sectional dimensions from 299mm to 800mm; (3) Thickness of fire protection coat from 14mm to 35mm. A derivation has been given for the surface temperature of concrete-filled tubular columns. Nonlinear finite element analysis has been carried out to calcula

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Ryu, Eunmi, Heesun Kim, and Yeongsoo Shin. "Experimental Study on the Temperature Distribution and Residual Strength of Fire-damaged RC Columns Depending on Heated Areas." Journal of the Korean Society of Hazard Mitigation 20, no. 3 (2020): 75–80. http://dx.doi.org/10.9798/kosham.2020.20.3.75.

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Most of the columns in actual fire conditions are heated on partial faces rather than all four sides due to the floor plan, which results in asymmetric behaviors of columns. The asymmetric behaviors of fire-damaged columns may cause more vulnerability to the structural performance. In this study, temperature distribution and residual strength of reinforced concrete columns exposed to fire were investigated according to various heated areas. To achieve the objective, columns were heated for 2 h according to ISO-834 standard time-temperature curve and subsequently tested under the axial loading

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Suntharalingam, Thadshajini, Irindu Upasiri, Perampalam Gatheeshgar, et al. "Fire resistance of 3D printed concrete composite wall panels exposed to various fire scenarios." Journal of Structural Fire Engineering 12, no. 3 (2021): 377–409. http://dx.doi.org/10.1108/jsfe-10-2020-0029.

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Purpose Fire safety of a building is becoming a prominent consideration due to the recent fire accidents and the consequences in terms of loss of life and property damage. ISO 834 standard fire test regulation and simulation cannot be applied to assess the fire performance of 3D printed concrete (3DPC) walls as the real fire time-temperature curves could be more severe, compared to standard fire curve, in terms of the maximum temperature and the time to reach that maximum temperature. Therefore, this paper aims to describe an investigation on the fire performance of 3DPC composite wall panels

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9

Yin, Yan, and Tang Li. "Numerical Simulation of Fire Resistance Performance for Planar Frame with Concrete Filled Steel Tubular Columns and Steel Beams." Applied Mechanics and Materials 94-96 (September 2011): 755–58. http://dx.doi.org/10.4028/www.scientific.net/amm.94-96.755.

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In this paper, the fire resistance performance of the unprotected two-layer and two-cross planar frame, which is composed of concrete filled steel tubular columns and steel beams, was analyzed under local fire by ANSYS. After analyzing the structure with the method of hot - structural coupling using standard heating curve ISO-834, some consequence were obtained such as the regularity of temperature field distribution of beams and columns and the fire endurance and critical temperature of the structure. It turned out that the bottom flange at the end of the beams appeared local buckling when th

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You, Woo Jun, Jung Wook Park, Yeon Je Sin, Hyeong Gyu Park, and Ohk Kun Lim. "Analysis of the Maximum Heat Release Rate in Accordance with the Test Method of the Flame Retardant Performance for Pipe Insulation." Fire Science and Engineering 34, no. 1 (2020): 18–25. http://dx.doi.org/10.7731/kifse.2020.34.1.018.

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In this study, the heat release rate of pipe insulation is analyzed by considering the installation status in accordance with the standards ISO 20632 and NFPA 274. The flame retardation rate was evaluated for six types of test samples: polyethylene foam covered with beaten silver (PE(S)), PE foam tapped (PE(N)), elastomeric closed cell thermal insulation (rubber), Japanese PE foam (PE(J)), Japanese polyurethane foam (PU(J)), and Japanese styro form (ST(J)) by EN 13501-1 and fire growth curve. The results show that PU(J), PE(J), and PE(N) were Class E and ultra-fast, NFPA 274 test standards for

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Liao, Xue Kun, Fang Fang Wei, and Li Hua Qu. "Preliminary Research on Mechanical Behavior of Steel Frame Filled with Steel Plate Shear Wall after Exposure to Overall Stage of Fire." Applied Mechanics and Materials 351-352 (August 2013): 90–94. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.90.

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For a further study on the fire-resistant performance of steel plate shear wall under overall stage of fire, a numerical analysis model of steel frame filled with steel plate shear wall was built with the finite element software ANSYS. The stress and displacement distribution at different moments were calculated through the thermal structural coupling analysis acording to ISO-834 standard fire curve, by reasonable selection of the thermal parameters, which showed the highest temperature appeared on the heated side of the beam in the process of heating up, while the highest temperature in the s

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Britez, C., P. Castro-Borges, A. Berto, and P. Helene. "Experimental evaluation of colored HSC column in fire conditions." Revista ALCONPAT 3, no. 1 (2013): 39–54. http://dx.doi.org/10.21041/ra.v3i1.42.

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ABSTRACTIn recent times it has been common to associate high-strength concrete with a greater susceptibility to explosive type spalling, when subjected to high temperatures. In part, this doubt is a result of some experimental programs that are carried out on small unreinforced concrete samples (specimens), which could substantially influence the structural concrete behavior in fire conditions. This paper presents an experimental program, carried out in Brazil on a high strength colored reinforced concrete column (HSCC), eight years-old, fc,8years = 140MPa, basalt coarse aggregate, cross secti

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Varghese, Alwyn, Anand N., Diana Andrushia, and Prince Arulraj. "Investigation on the performance of fiber reinforced concrete subjected to standard fire exposure." World Journal of Engineering 18, no. 3 (2021): 442–51. http://dx.doi.org/10.1108/wje-04-2020-0138.

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Purpose Aim of this research work is to examine the stress–strain behavior and modulus of elasticity of fiber-reinforced concrete (FRC) exposed to elevated temperature. The purpose of this paper is to study the effect of standard fire exposure on the mechanical and microstructure characteristics of concrete specimens with different strength grade. Design/methodology/approach An electrical bogie hearth furnace was developed to simulate the ISO 834 standard fire curve. Specimens were exposed to high temperatures of 821°C, 925°C and 986°C for the duration of 30, 60 and 90 min, respectively, as pe

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Thanaraj, Daniel Paul, N. Anand, G. Prince Arulraj, and Ehab Zalok. "Post-fire damage assessment and capacity based modeling of concrete exposed to elevated temperature." International Journal of Damage Mechanics 29, no. 5 (2019): 748–79. http://dx.doi.org/10.1177/1056789519881484.

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Fire represents one of the significant hazards encountered by civil infrastructures, and thus providing appropriate fire safety measures is a major requirement in a building design for ensuring the safety of the occupants. Minimizing fire-induced damage and collapse of structural systems are the primary objectives in the design of concrete structures. An experimental investigation has been carried out to examine the mechanical properties such as compressive, tensile and flexural strengths of concrete exposed to elevated temperature following standard fire curve as per ISO 834. Capacity-based s

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Kahanji, C., F. Ali, and A. Nadjai. "Explosive spalling of ultra-high performance fibre reinforced concrete beams under fire." Journal of Structural Fire Engineering 7, no. 4 (2016): 328–48. http://dx.doi.org/10.1108/jsfe-12-2016-023.

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Purpose The purpose of the study was to investigate the spalling phenomenon in ultra-high performance fibre reinforced concrete (UHPFRC) beams on exposure to a standard fire curve (ISO 834) under a sustained load. Design/methodology/approach The variables in this study were steel fibre dosage, polypropylene (PP) fibres and loading levels. The research investigated seven beams – three of which contained steel fibres with 2 vol.%, another three had steel fibres with 4 vol.% dosage and the seventh beam had a combination of steel fibres (2 vol.%) and PP fibres (4 kg/m3). The beams were tested for

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Sekkiou, Soumia, Noureddine Lahbari, Fabrice Bernard, and Mohamed Salah Dimia. "Thermo-Mechanical Behavior of Steel-Concrete Composite Columns under Natural Fire Including Heating and Cooling Phases." International Journal of Engineering Research in Africa 35 (March 2018): 221–40. http://dx.doi.org/10.4028/www.scientific.net/jera.35.221.

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The fire behavior of concrete filled hollow steel sections has been studied extensively in various countries. Almost all essential parameters influencing their resistance have been identified: section shape and dimensions, concrete filling, reinforcement ratio, steel tube thickness, column slenderness, thermal and mechanical properties of steel and concrete, and even the contact problem at the steel-concrete interface. Most of these works were done under standard fire conditions (ISO), which are represented by a continuously increasing temperature over time. It is thus not really a curve refle

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Miah, Md Jihad, Francesco Lo Monte, Roberto Felicetti, Hélène Carré, Pierre Pimienta, and Christian La Borderie. "Fire Spalling Behaviour of Concrete: Role of Mechanical Loading (Uniaxial and Biaxial) and Cement Type." Key Engineering Materials 711 (September 2016): 549–55. http://dx.doi.org/10.4028/www.scientific.net/kem.711.549.

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Fire poses one of the most severe environmental conditions that can act on concrete structures as an external load and can induce severe damages (cracks, spalling) or even lead to collapse. Fire spalling of concrete is a complex phenomenon, which might occur due to pressure build-up in the pores, thermal and load-induced stresses. In this context, ordinary concrete specimens (B40-II and B40-III: fc28days ≈ 40 MPa) were exposed to standard fire curve (ISO 834-1), while a constant uniaxial or biaxial compressive load was applied. Six different levels of uniaxial compressive stress on cubes and f

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Wang, Ji, Wen Hua Song, Zhong Jun Shu, and Miao Zhang. "The Protective Effect of the Intumescent Coating on the Fire Resistance Performance of Cable." Applied Mechanics and Materials 423-426 (September 2013): 714–19. http://dx.doi.org/10.4028/www.scientific.net/amm.423-426.714.

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The failure time of polyvinylchloride (PVC) insulated power cables was studied using an infrared radiation heating furnace and insulation resistance measurements. The temperature-time curve inside the furnace was similar to that of the ISO 834 standard. Two popular fire protection methods were employed for the cables; one method applied fire-retardant coatings directly on the cable surface, and the other inserted the cables into metal conduits coated with structural steel fire-retardant coating. The results showed that for both protection methods, the failure time of the cable increased with t

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Del Prete, Iolanda, Giuseppe Cefarelli, and Emidio Nigro. "Calibration of a simplified method for fire resistance assessment of partially encased composite beams." Journal of Structural Fire Engineering 7, no. 3 (2016): 262–82. http://dx.doi.org/10.1108/jsfe-09-2016-019.

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Purpose This paper aims to deal with the evaluation of the bending moment resistance of partially encased composite beams, heated from below by the standard-time temperature curve (ISO 834). Design/methodology/approach EN 1994-1-2 provides two calculation models for evaluating the sagging and hogging moment resistance: the “general simplified rules” and the “simplified models” proposed in the Annex F. Findings In this paper, these simplified calculation models were implemented on several partially encased composite beams, by means of a parametric analysis. Then, the results were compared to th

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de Oliveira, Clayton Reis, and Armando Lopes Moreno. "Residual Strength of the CFRP- Strengthening Small Concrete Columns in Fire Situation." Applied Mechanics and Materials 302 (February 2013): 481–85. http://dx.doi.org/10.4028/www.scientific.net/amm.302.481.

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This paper presents the experimental results of a study carried out to investigate the performance of small scale concrete columns retrofitted with unidirectional carbon fiber-reinforced polymer (CFRP) in fire situation. This study aims at the effectiveness of CFRP through the contrast test. In order to observe the residual compressive strength, the specimen was heated to a target temperature and mechanically tested under axial compression. Other similar heated specimen was cooled down to the room temperature and mechanically tested too. This procedure was repeated by temperatures of 200oC, 30

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Nováková, Iveta, and Petra Macháňová. "Ultrasound Measurements for the Detection of Disintegration of Concrete Slabs Exposed to Fire." Advanced Materials Research 1100 (April 2015): 124–27. http://dx.doi.org/10.4028/www.scientific.net/amr.1100.124.

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The paper presents the application of ultrasound measurements for the determination of structural alterations of concrete exposed to fire. Concrete is evaluated as an incombustible material, class A1, but the high exposure temperature, like in fire, may cause cracks and changes of internal structure. The ultrasound measurement is a nondestructive method. It is possible to measure ultrasound velocity before and after thermal loading. The ultrasound measurement could be used also at building side as to detect structural alterations after a fire or imperfection in concrete elements. Three differe

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Lee, Taegyu, Gyuyong Kim, Gyeongcheol Choe, et al. "Spalling Resistance of Fiber-Reinforced Ultra-High-Strength Concrete Subjected to the ISO-834 Standard Fire Curve: Effects of Thermal Strain and Water Vapor Pressure." Materials 13, no. 17 (2020): 3792. http://dx.doi.org/10.3390/ma13173792.

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The prevention and mitigation of spalling in high-strength concrete (HSC) rely on mixing polypropylene (PP) as an additive reinforcement. The dense internal structures of ultra-high-strength concrete (UHSC) result in risks associated with a high thermal stress and high water vapor pressure. Herein, the effects of pore formation and thermal strain on spalling are examined by subjecting fiber-laden UHSC to conditions similar to those under which the ISO-834 standard fire curve was obtained. Evaluation of the initial melting properties of the fibers based on thermogravimetric analysis (TGA) and d

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Ai, Hui, Chuan Qing Zhang, Li Zhang, and Ju Tian. "Research on Bearing Capacity of Prestressed Concrete T-Beam at High Temperature in Fire." Advanced Materials Research 160-162 (November 2010): 1716–23. http://dx.doi.org/10.4028/www.scientific.net/amr.160-162.1716.

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The bearing capacity of bridge structure would decrease under high temperature in fire, and there is a risk of structural collapse when the bearing capacity decreased to a certain degree. The estimate of bearing capacity of concrete structure at high temperature in fire will directly influence the scheme of disaster relief. Recently, there are a few researches on evaluating the bearing capacity of concrete structure at high temperature in fire, even fewer on bearing capacity of prestressed structure. Surface temperature and temperature of internal specific position of prestressed concrete T-be

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de Souza, Rodrigo P., Fernanda Pacheco, Gustavo L. Prager, et al. "Verification of the Influence of Loading and Mortar Coating Thickness on Resistance to High Temperatures Due to Fire on Load-Bearing Masonries with Clay Tiles." Materials 12, no. 22 (2019): 3669. http://dx.doi.org/10.3390/ma12223669.

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Masonry has been widely used as a construction method. However, there is a lack of information on its fire behavior due to the multitude of variables that could influence this method. This paper aimed to identify the influence of loading and mortar coating thickness on the fire behavior of masonry. Hence, six masonries made of clay tiles laid with mortar were evaluated. The mortar coating had a thickness of 25 mm on the face not exposed to high temperatures, while the fire-exposed face had thicknesses of 0, 15, and 25 mm. For each mortar coating thickness, two specimens were tested, with and w

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Thanaraj, Daniel Paul, Anand N., and Prince Arulraj. "Experimental investigation of mechanical properties and physical characteristics of concrete under standard fire exposure." Journal of Engineering, Design and Technology 17, no. 5 (2019): 878–903. http://dx.doi.org/10.1108/jedt-09-2018-0159.

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Purpose This paper aims to explain the influence of Standard Fire as per ISO 834 on the strength and microstructure properties of concrete specimens with different strength grade. Design/methodology/approach The strength grades of concrete considered for the experimental investigation were Fck20, Fck30, Fck40 and Fck50. The specimens were heated up to 1, 2, 3 and 4 h as per standard fire curve. Effect of elevated temperature on compressive and flexural behavior of specimens with various strength grades was examined. Effects of age of concrete, weight loss, surface characteristics and thermal c

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Andres, Blanca, Karlis Livkiss, Juan P. Hidalgo, et al. "Response of stone wool–insulated building barriers under severe heating exposures." Journal of Fire Sciences 36, no. 4 (2018): 315–41. http://dx.doi.org/10.1177/0734904118783942.

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This article presents the experimental results of stone wool–layered sandwich constructions, with either steel or gypsum claddings, tested under four different heating exposures: 7 kW/m2 incident radiant heat flux exposure, 60 kW/m2 incident radiant heat flux exposure, parametric time–temperature curve exposure and ISO 834 standard time–temperature exposure. The test apparatus used were a movable radiant panel system, a mid-scale furnace (1.5 m3) and a large-scale furnace (15 m3). The results show that reduced-scale tests are capable of reproducing the heat transferred through the construction

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Kassem, Abdelraouf Tawfik. "Buckling of Radially Loaded Concrete Cylinders in Fire Condition." Civil Engineering Journal 5, no. 6 (2019): 1214–26. http://dx.doi.org/10.28991/cej-2019-03091326.

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Concrete cylinders are commonly used in water treatment and sewerage plants, in the form of wells or basins. They are mainly subjected to axial compression resulting from soil lateral pressure and aqueous hydrostatic pressure, in case of the presence of a groundwater table; that is why they are mostly designed in the form of a circular hollow section. Concrete cylinders face a complicated case of loading in fire condition, as a result of material degradation in addition to thermally induced stresses. This paper studies buckling stability of that case where, a concrete cylinder is subjected to

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Bahr, Oliver. "A Study on the Conservativeness of ISO Standard Fire in Office Buildings." Journal of Structural Fire Engineering 5, no. 1 (2014): 35–46. http://dx.doi.org/10.1260/2040-2317.5.1.35.

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In fire safety engineering, the ISO standard fire often represents fire action. Nevertheless, it is often not clear how conservative the ISO standard fire is when compared to natural fires. Thus, numerical research on fires in office buildings was conducted. To assess the severity of the ISO standard fire, the author proposes a simple approach basing on the heat release rate. For two regarded office rooms, artificial heat release curves were established and used as input in the zone model ‘Ozone’. These heat release curves were adjusted in order to match gas temperatures defined by the ISO sta

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Wang, Zhong Qiang, and Zhi Wu Yu. "The Experimental Research and Theoretical Analysis of Unbonded Prestressed Concrete Flat Beams at High Temperature." Advanced Materials Research 250-253 (May 2011): 2242–52. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.2242.

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The experiments of 26 unbonded prestressed concrete flat beams under fire with elevating the temperature according to the ISO time-temperature standard curve were accomplished in the large structures electrical heating furnace that was manufactured independently. The macroscopical phenomena of water penetration, the lube flowing, the spalling of concrete and the corlor change of aspect were observed. The laws of behaviors such as temperature distribution on section,the deformation characteristic and stress varieties of prestressed tendons were investigated through the tests. The experiments in

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Kim, Seungwon, Topendra Oli, and Cheolwoo Park. "Effect of Exposure to High Temperature on the Mechanical Properties of SIFRCCs." Applied Sciences 10, no. 6 (2020): 2142. http://dx.doi.org/10.3390/app10062142.

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Many researchers have studied explosion prevention and fire resistance of high-strength concrete mixed with organic fiber and steel fibers. The fire resistance of high-performance fiber reinforced cement composites is desirable in terms of physical and mechanical properties. However, the use of a polymer as an alternative to organic fiber has not been clearly studied. In this study, a slurry infiltration method was used to obtain slurry-infiltrated fiber-reinforced cementitious composites (SIFRCCs) specimens. Powder polymer was used instead of organic fibers during mixing of the slurry. The co

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Shao, Yongbo, Haicheng Zhao, and Dongping Yang. "Discussion on two methods for determining static strength of tubular T-joints at elevated temperature." Advances in Structural Engineering 20, no. 5 (2016): 704–21. http://dx.doi.org/10.1177/1369433216662287.

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To predict the static strength of a welded tubular joint at elevated temperature using finite element simulation, two methods in the literature were reported. The first method aims to analyze the static strength of a tubular joint at a specified elevated temperature, and a routine mechanical analysis is carried out by defining the material properties at the specified elevated temperature according to some specifications. This method does not consider the heat transfer process of the tubular joint in a fire condition. The second method is used to determine the static strength of a tubular joint

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Wang, Weiyong, and Tianzi Liu. "Experimental and numerical study on post-fire behavior of high-strength Q460 steel columns." Advances in Structural Engineering 19, no. 12 (2016): 1873–88. http://dx.doi.org/10.1177/1369433216649390.

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Experimental study and finite element modeling on the structural behavior of high-strength Q460 steel columns after being exposed to ISO-834 standard fire are presented. Two section shapes were considered, namely welded H-shaped section and welded box-section. The experiment composes of two stages: heating and cooling stage of the specimens and compressive test on the specimen after fire exposure. The temperatures experienced in the specimens were recorded during both the heating and cooling phases, as well as the load–deflection curves, load–axial displacement curves, load–rotation curves, lo

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Liu, Yong Jun, Ran Bi, and Yan Wang. "Calculating Temperature Distribution in Concrete Encased H-Section Steel Column in Fires Using TFIELD." Applied Mechanics and Materials 204-208 (October 2012): 3445–49. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3445.

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Steel–concrete composite columns are used extensively in modern buildings in recent decades due to the benefits of combining two construction materials: reinforced concrete is inexpensive, massive, and stiff, while steel members are strong, lightweight, and easy to assemble. For concrete-encased composite structural members, an additional advantage is that the concrete used for encasing a structural steel not only increases its stiffness, but also protects it from fire damage and local buckling failure. Traditionally, the fire resistance of composite structural members has been determined in s

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Xu, Lei, and Yu Bin Liu. "Fire Resistance of Bar-Reinforced Concrete Filled Steel Columns." Key Engineering Materials 400-402 (October 2008): 757–62. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.757.

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In this paper a numerical model for fire resistance analysis of bar-reinforced concrete filled steel columns with square and circular cross-sections have been put forward. The model has been validated by testing results. There is a good agreement. Used of the theoretical model, the relations between the fire resistance and various parameters have been analyzed. On the basis of that, formulas for the calculation of the fire resistance of bar-reinforced concrete filled square and circular steel columns under ISO-834 Standard Fire Curves are developed respectively. The calculated results have a g

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Liu, Yong Jun, Qing Hong Zeng, Hong Ru Liu, and Shuo Xun Wang. "Experimental Study on Post Fire Tensile Properties of Reinforcing Rebars Connected by Grout-Filled Splice Sleeves." Key Engineering Materials 773 (July 2018): 305–10. http://dx.doi.org/10.4028/www.scientific.net/kem.773.305.

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This paper presents some experimental results of tensile properties of reinforcing bars spliced by grout-filled coupling sleeves after exposed to fires to identify the effect of temperature histories on tensile properties of spliced reinforcing bars, which provide a useful base for assessing structural behaviors of precast reinforced concrete buildings damaged by fires. A spliced rebar system investigated in this paper consists of two equal-diameter steel reinforcing bars with 25mm diameter and a straight coupling sleeve with 55mm outer and 42mm inner diameters. As a result, the thickness of g

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Xu, Lei, and Yan-Hong Bao. "Experimental study on the fire resistance of concrete filled steel tube reinforced concrete (CFSTRC) column-RC beam frames." Advances in Structural Engineering 24, no. 11 (2021): 2413–26. http://dx.doi.org/10.1177/13694332211001519.

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To reveal the temperature characteristics and mechanical properties of frame structures with concrete filled steel tube reinforced concrete (CFSTRC) columns under fire, the fire resistance of four planar frames consisting of CFSTRC columns and reinforced concrete (RC) beams subjected to ISO-834 standard fire was tested in this study. The test parameters included the column fire load ratio, beam fire load ratio, and beam-to-column linear stiffness ratio. In the test, the temperatures of the column, beam, and slab cross-sections in the joint and nonjoint zones were measured, and the fire resista

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Shi, Yang, Zhiyuan Ma, Rufu Qin, Xiaoping Wang, Wujing Wei, and Hongfei Fan. "Implementation of an Attribute-Based Encryption Scheme Based on SM9." Applied Sciences 9, no. 15 (2019): 3074. http://dx.doi.org/10.3390/app9153074.

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In recent years, attribute-based encryption (ABE) has been widely applied in mobile computing, cloud computing, and the Internet of things, for supporting flexible and fine-grained access control of sensitive data. In this paper, we present a novel attribute-based encryption scheme that is based on bilinear pairing over Barreto and Naehrig curves (BN-curves). The identity-based encryption scheme SM9, which is a Chinese commercial cryptographic standard and a forthcoming part of ISO/IEC11770-3, has been used as the fundamental building block, and thus we first introduce SM9 and present our SM9

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Morgado, T., J. R. Correia, N. Silvestre, and F. Branco. "Resistencia al fuego de perfiles pultruídos de polímero reforzado con fibras de vidrio (GFRP) para aplicaciones en rehabilitación: Estudio experimental, numérico y analítico." Revista ALCONPAT 6, no. 2 (2016): 157–71. http://dx.doi.org/10.21041/ra.v6i2.136.

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Resistencia al fuego de perfiles pultruídos de polímero reforzado con fibras de vidrio (GFRP) para aplicaciones en rehabilitación: Estudio experimental, numérico y analíticoRESUMENEl presente artículo presenta un estudio sobre la resistencia al fuego de vigas fabricadas con perfiles pultrusionados de polímero reforzado con fibra de vidrio (GFRP). Se realizaron ensayos de resistencia al fuego en vigas con un vano de 1.3 m, expuestas a la acción del fuego según la norma ISO 834. En estos ensayos, se evaluó el efecto de diferentes tipos de exposición al fuego y los niveles de carga aplicados, así

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Xolin, Paul, Simon Becker, Frédéric Thiébaud, Marc Engels-Deutsch, and Tarak Ben Zineb. "Combined bending–torsion testing device for characterization of shape memory alloy endodontic files." Journal of Intelligent Material Systems and Structures 31, no. 15 (2020): 1763–81. http://dx.doi.org/10.1177/1045389x20932218.

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Design has an important influence on mechanical response of endodontic instruments made of shape memory alloys. The experimental and numerical prediction of their thermomechanical response is necessary to improve their behavior during operating inside root canal. Due to the curved and tapered shape of the dental canal, endodontic files are subjected to rotating bending during the root canal preparation phase. These rotative bending could ever be combined with torsion when the instruments are engined in the root canal. Bending and torsion tests available in the standard ISO 3630-1 do not take i

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Stepinac, Mislav, and Vlatka Rajčić. "RELIABILITY OF TIMBER STRUCTURES EXPOSED TO FIRE." Applications of Structural Fire Engineering, January 18, 2016. http://dx.doi.org/10.14311/asfe.2015.045.

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<p>Until recently, the fire resistance of buildings was based on the ISO standard curve. ISO standard curve used by the current norm is too simple, unrealistic and lead to uneconomic situations with no guarantee of security proportional to the invested money. Unlike the fire design of the steel, concrete or composite structures, methods for fire design of timber structures have been greatly simplified. Generally, it is not necessary to check the reduction of strength in the residual section because each increase of temperature is considered small and it is ignored. Global fire safety con

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Rodrigues, João Paulo C., Luís Laím, and Helder D. Craveiro. "Structural fire performance of restrained composite columns made of concrete-filled square and circular hollow sections." Fire Research, March 31, 2016. http://dx.doi.org/10.4081/fire.2017.15.

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Most of the previous studies on concretefilled steel hollow section columns at high temperatures addressed the effect of depth-tothickness ratio, column slenderness, initial applied load level, load eccentricity, and local buckling of concrete-filled steel tubes on the fire resistance of these columns. For this reason, it important and required to study the influence of the axial and rotational restraint on the buckling behavior of these types of columns subjected to fire. The results of a series of fire resistance tests on these types of columns inserted in a steel frame are presented and dis

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Ryu, Eunmi, Heesun Kim, and Yeongsoo Shin. "Experimental Study on the Cyclic Performance of Reinforced Concrete Shear Walls Exposed to Fire." International Journal of Concrete Structures and Materials 14, no. 1 (2020). http://dx.doi.org/10.1186/s40069-020-00443-8.

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AbstractThe purpose of this study was to investigate the thermal and cyclic behaviors of fire-damaged walls designed with different failure modes, aspect ratios and heated areas. These cyclic behaviors include temperature distribution, maximum lateral load, stiffness, ductility, and energy dissipations, etc. Toward this goal, the concrete wall specimens were exposed to heat following an ISO 834 standard time–temperature curve and the cyclic loading was applied to the fire-damaged walls. The test results showed that exposure to fire significantly reduced the cyclic performance of the RC walls.

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Pedron, Augusto, and Nicola Tondini. "Fire Behaviour of a Prestressed Thin-Walled Concrete V-Beam." Fire Technology, June 23, 2021. http://dx.doi.org/10.1007/s10694-021-01149-3.

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AbstractThe present work investigates the fire behaviour of a prestressed thin-walled concrete V-beam with variable cross section along its longitudinal axis. In particular, the results obtained from different modelling strategies implemented through analytical computations and Finite Element (FE) thermo-mechanical analyses conducted both with Euler–Bernoulli beam elements and with shell elements were compared. The models were able to properly allow for the prestressing force and its variation with temperature. The mode of failure was analysed both at ambient temperature and at elevated temper

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Mathews, Mervin Ealiyas, Anand N, Diana Andrushia A, Tattukolla Kiran, and Khalifa Al-Jabri. "Flexural behavior of fire damaged self-compacting concrete beams strengthened with fiber reinforced polymer (FRP) wrapping." Journal of Structural Fire Engineering ahead-of-print, ahead-of-print (2021). http://dx.doi.org/10.1108/jsfe-02-2021-0007.

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PurposeBuilding elements that are damaged by fire are often strengthened by fiber wrapping techniques. Self-compacting concrete (SCC) is an advanced building material that is widely used in construction due to its ability to flow and pass through congested reinforcement and fill the required areas easily without compaction. The aim of the research work is to examine the flexural behavior of SCC subjected to elevated temperature. This research work examines the effect of natural air cooling (AC) and water cooling (WC) on flexural behavior of M20, M30, M40 and M50 grade fire-affected retro-fitte

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Kirbaş, İbrahim. "Investigation of the internal structure, combustion, and thermal resistance of the rigid polyurethane materials reinforced with vermiculite." Journal of Thermoplastic Composite Materials, July 14, 2020, 089270572093915. http://dx.doi.org/10.1177/0892705720939152.

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In this study, 5%, 10%, and 15% vermiculite was added to the rigid polyurethane (PU) structure as a fire retardant. The scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), limiting oxygen index, thermal gravimetric analysis, differential scanning calorimetric (DSC) curves, and combustion behavior of the composite materials were investigated. When SEM/EDS analyses were examined, it was observed that surface morphology was affected by the amount of additive material. When XRD analyses were examined, peaks appeared in three different groups. Th

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