Nonlinear Mechanical Responses of Concrete Beams Reinforced with High-Performance CFRP Tendons

2021 ◽  
Author(s):  
J. Zhang ◽  
Y. L. Jiang ◽  
H. Liu ◽  
X. M. Zhao ◽  
X. Chen ◽  
...  
Keyword(s):  
High Performance ◽  
Concrete Beams ◽  
Mechanical Responses ◽  
Nonlinear Mechanical

Flexural behavior of concrete beams cast with high-performance materials

2020 ◽  
pp. 101912
Author(s):  
Rahman S. Kareem ◽  
Canh N. Dang ◽  
W. Micah Hale
Keyword(s):  
High Performance ◽  
Concrete Beams ◽  
Flexural Behavior

Integrated High-Performance Concrete Beams Reinforced with Hybrid BFRP and Steel Bars

2022 ◽  
Vol 148 (1) ◽  
Author(s):  
Xin Wang ◽  
Shui Liu ◽  
Yuwei Shi ◽  
Zhishen Wu ◽  
Weidong He
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Concrete Beams ◽  
Steel Bars

Mechanics of the human femoral adventitia including the high-pressure response

2002 ◽  
Vol 282 (6) ◽  
pp. H2427-H2440 ◽  
Author(s):  
Christian A. J. Schulze-Bauer ◽  
Peter Regitnig ◽  
Gerhard A. Holzapfel
Keyword(s):  
High Pressures ◽  
Energy Functions ◽  
Mean Values ◽  
Mechanical Responses ◽  
Strongly Nonlinear ◽  
Pressure Load ◽  
Nonlinear Mechanical ◽  
Load Carrying

Adventitial mechanics were studied on the basis of adventitial tube tests and associated stress analyses utilizing a thin-walled model. Inflation tests of 11 nonstenotic human femoral arteries (79.3 ± 8.2 yr, means ± SD) were performed during autopsy. Adventitial tubes were separated anatomically and underwent cyclic, quasistatic extension-inflation tests using physiological pressures and high pressures up to 100 kPa. Associated circumferential and axial stretches were typically <20%, indicating “adventitiosclerosis.” Adventitias behaved nearly elastically for both loading domains, demonstrating high tensile strengths (>1 MPa). The anisotropic and strongly nonlinear mechanical responses were represented appropriately by two-dimensional Fung-type stored-energy functions. At physiological pressure (13.3 kPa), adventitias carry ∼25% of the pressure load in situ, whereas their circumferential and axial stresses were similar to the total wall stresses (∼50 kPa in both directions), supporting a “uniform stress hypothesis.” At higher pressures, they became the mechanically predominant layer, carrying >50% of the pressure load. These significant load-carrying capabilities depended strongly on circumferential and axial in-vessel prestretches (mean values: 0.95 and 1.08). On the basis of these results, the mechanical role of the adventitia at physiological and hypertensive states and during balloon angioplasty was characterized.

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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