Experimental research on the fire performance of a special cross-shaped composite column with a high-strength concrete-filled steel tubular core

2018 ◽  
Vol 21 (11) ◽  
pp. 1608-1619 ◽  
Author(s):  
Yong Yang ◽  
Lin Zhang ◽  
Yicong Xue ◽  
Dengpan Zhao ◽  
Hui Deng ◽  
...  
Keyword(s):  
Experimental Research ◽  
High Strength Concrete ◽  
High Strength ◽  
Fire Performance ◽  
Composite Column ◽  
Strength Concrete

Innovative strategies for enhancing fire performance of high-strength concrete structures

2018 ◽  
Vol 21 (11) ◽  
pp. 1723-1732 ◽  
Author(s):  
Venkatesh KR Kodur
Keyword(s):  
High Strength Concrete ◽  
High Strength ◽  
Published Data ◽  
Structural Members ◽  
Fire Performance ◽  
Normal Strength Concrete ◽  
Innovative Strategies ◽  
Strength Concrete ◽  
Normal Strength ◽  
Fire Conditions

High-strength concrete is being increasingly used in a number of building applications, where structural fire safety is one of the primary design considerations. Many research studies clearly indicate that the fire performance of high-strength concrete is different from that of normal-strength concrete and that high-strength concrete may not exhibit same level of performance as normal-strength concrete under fire conditions. This article outlines key characteristics that influence the performance of high-strength concrete structural members under fire conditions. Data generated in previous experimental and numerical studies are utilized to illustrate various factors that influence fire performance of high-strength concrete structural members. Based on the published data, observations and trends on the behavior of high-strength concrete members, innovative strategies for mitigating spalling and enhancing fire resistance of high-strength concrete structural members are proposed.

scholarly journals Fire Performance of Columns Made of Normal and High Strength Concrete: A Comparative Analysis

2016 ◽  
Vol 711 ◽  
pp. 564-571 ◽  
Author(s):  
Thomas Gernay
Keyword(s):  
Bearing Capacity ◽  
High Strength Concrete ◽  
Concrete Strength ◽  
High Strength ◽  
Strength Loss ◽  
Fire Performance ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Strength Concrete ◽  
The Impact

The use of high strength concrete (HSC) in multi-story buildings has become increasingly popular. Selection of HSC over normal strength concrete (NSC) allows for reducing the dimensions of the columns sections. However, this reduction has consequences on the structural performance in case of fire, as smaller cross sections lead to faster temperature increase in the section core. Besides, HSC experiences higher rates of strength loss with temperature and a higher susceptibility to spalling than NSC. The fire performance of a column can thus be affected by selecting HSC over NSC. This research performs a comparison of the fire performance of HSC and NSC columns, based on numerical simulations by finite element method. The thermal and structural analyses of the columns are conducted with the software SAFIR®. The variation of concrete strength with temperature for the different concrete classes is adopted from Eurocode. Different configurations are compared, including columns with the same load bearing capacity and columns with the same cross section. The relative loss of load bearing capacity during the fire is found to be more pronounced for HSC columns than for NSC columns. The impact on fire resistance rating is discussed. These results suggest that consideration of fire loading limits the opportunities for use of HSC, especially when the objective is to reduce the dimensions of the columns sections.

scholarly journals Experimental Research on Properties of High Strength Concrete (FRSCC)

2019 ◽  
Vol 8 (6S4) ◽  
pp. 264-266
Keyword(s):  
Impact Strength ◽  
Flexural Strength ◽  
Experimental Research ◽  
High Strength Concrete ◽  
Concrete Structures ◽  
Drying Shrinkage ◽  
High Strength ◽  
Failure Pattern ◽  
Strength Concrete ◽  
Hardened State

SCC and FRC may be classified as superior Concrete because of its special proportions and properties. HPC may be a specialized concrete designed top reduce many edges within the construction of concrete structures that can't continually be achieved habitually mistreatment standard ingredients, traditional mixture & hardening practices. Fibres into SCC will produce FRSCC with superior properties in a fresh and hardened state. The bolstered fibres in concrete might improve the durability, flexural strength, impact strength, toughness, drying shrinkage, and failure pattern of the concrete.

The Experimental Research of a Heavyweight High-Strength Concrete

2009 ◽  
Vol 614 ◽  
pp. 263-268
Author(s):  
Ying She Luo ◽  
Hong Wang ◽  
Wen Bin Liu ◽  
Shou Chang Deng ◽  
Yuan Rong Ma
Keyword(s):  
Fly Ash ◽  
Feasibility Study ◽  
Experimental Research ◽  
Apparent Density ◽  
High Strength Concrete ◽  
High Strength ◽  
Silica Powder ◽  
Strength Concrete ◽  
Optimum Proportion ◽  
Definition Of

The definition of heavyweight high-strength concrete（HHC for short）is firstly introduced. According to the characteristic targets of a HHC, suitable experimental material and project are chosen. Via analyzing and commenting on various properties of different minerals such as silica powder and fly ash, a feasibility study for mixed them into concrete to manufacture HHC is conducted, and its mechanics properties and Alkali-resistant property are tested. On the basis of them, HHC whose strength is C60 and apparent density is 2800 kg/m3 is successfully manufactured. The optimum proportion is given out.

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