Response of normal-strength and ultra-high-performance fiber-reinforced concrete columns to idealized blast loads

2014 ◽  
Vol 61 ◽  
pp. 1-12 ◽  
Author(s):  
Serdar Astarlioglu ◽  
Ted Krauthammer
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Concrete Columns ◽  
Fiber Reinforced Concrete ◽  
Blast Loads ◽  
Fiber Reinforced ◽  
Reinforced Concrete Columns ◽  
High Performance Fiber ◽  
Normal Strength

Dynamic performances of ultra-high-performance fiber-reinforced concrete–strengthened concrete columns subjected to blast impacts

2020 ◽  
Vol 23 (14) ◽  
pp. 3009-3023
Author(s):  
Jingyu Wang ◽  
Wancheng Yuan ◽  
Ruiwei Feng ◽  
Junjun Guo ◽  
Xinzhi Dang
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Concrete Columns ◽  
Fiber Reinforced Concrete ◽  
Design Parameters ◽  
Economic Losses ◽  
Fiber Reinforced ◽  
Reinforced Concrete Columns ◽  
Structural Resistance ◽  
High Performance Fiber

Normal functionality of common concrete structures such as bridges and buildings relies heavily on the structural resistance under accidental or anthropogenic blast events. As one of the widely used structural types, reinforced concrete columns need to be highly considered when blast events occur to avoid severe socio-economic losses. To improve the blast–impact resistance of conventional reinforced concrete columns, this article makes the following contributions: (1) proposes to adopt the advanced ultra-high-performance fiber-reinforced concrete to strengthen the columns as a protective layer; (2) validates the superiority of ultra-high-performance fiber-reinforced concrete–strengthened columns through comparative study and specifies the controlling design parameters through sensitivity analysis; (3) implements and compares various ultra-high-performance fiber-reinforced concrete reinforcement methods; and (4) develops a numerical formula to predict the residual capacity of ultra-high-performance fiber-reinforced concrete–strengthened columns under blast impacts as a suitable alternate of the complicated and time-consuming finite element simulations.

A comparative study of flexural and shear behavior of ultra-high-performance fiber-reinforced concrete beams

2019 ◽  
Vol 22 (7) ◽  
pp. 1727-1738 ◽  
Author(s):  
Masoud Pourbaba ◽  
Hamed Sadaghian ◽  
Amir Mirmiran
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Concrete Beams ◽  
Shear Behavior ◽  
Fiber Reinforced Concrete ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced ◽  
High Performance Fiber ◽  
Loading Tests ◽  
Normal Strength

In this research, the flexural and shear behavior of five locally developed ultra-high-performance fiber-reinforced concrete beams was experimentally investigated. Four-point loading tests were carried out on concrete specimens which were further compared with five normal-strength concrete beams constructed at the laboratory. The objective of this study is to assess the flexural and shear behavior of ultra-high-performance fiber-reinforced concrete beams and compare them with that of normal-strength beams and available equations in the literature. Results indicate underestimation of shear (up to 2.71 times) and moment capacities (minimum 1.27 times, maximum 3.55 times) by most of the equations in beams with low-reinforcement ratios. Finally, results reveal that the experimental flexural and shear capacities of ultra-high-performance fiber-reinforced concrete specimens are up to 3.5 times greater than their normal-strength counterpart specimens.

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