scholarly journals Erratum: “Failure of concrete and reinforced-concrete plates under high-speed shock and explosion” [Doklady Physics 50, 132 (2005)]

2005 ◽  
Vol 50 (8) ◽  
pp. 430-430
Author(s):  
S. A. Afanas’ev ◽  
N. N. Belov ◽  
D. G. Kopanitsa ◽  
N. T. Yugov ◽  
A. A. Yugov
Keyword(s):  
Reinforced Concrete ◽  
High Speed ◽  
Doklady Physics ◽  
Concrete Plates

Failure Behavior and Numerical Simulation of the Local Damage of Ultra High Strength Fiber Reinforced Concrete Subjected to High Velocity Impact

2014 ◽  
Vol 566 ◽  
pp. 205-210 ◽  
Author(s):  
Seong Bong Cheon ◽  
Masuhiro Beppu ◽  
Yoshimi Sonoda ◽  
Masaharu Itoh
Keyword(s):  
Reinforced Concrete ◽  
High Speed ◽  
High Strength ◽  
Fiber Reinforced Concrete ◽  
Failure Behavior ◽  
Local Damage ◽  
Fiber Reinforced ◽  
Concrete Plates ◽  
High Strength Fiber ◽  
The Impact

This study presents the local damage of ultra high strength fiber reinforced concrete plates. Impact test of the reinforced concrete plates using two different short fibers are conducted to examine the failure behavior and impact resistant performance. Material models are discussed and proposed by simulating the high speed tri-compressive and uni-tensile tests. Numerical simulations of the impact tests are carried out. Numerical results show good agreements with the test results.

Failure of concrete and reinforced-concrete plates under high-speed shock and explosion

2005 ◽  
Vol 50 (3) ◽  
pp. 132-135
Author(s):  
S. A. Afanas’eva ◽  
N. N. Belov ◽  
D. G. Kopanitsa ◽  
N. T. Yugov ◽  
A. A. Yugov
Keyword(s):  
Reinforced Concrete ◽  
High Speed ◽  
Concrete Plates

FORECASTING THE CONSEQUENCES OF HIGH-SPEED INTERACTION OF REINFORCED CONCRETE AND STEEL-CONCRETE CONSTRUCTIONS WITH HIGH-SPEED PROJECTILES

2016 ◽  
Vol 47 (7) ◽  
pp. 609-616
Author(s):  
N. N. Belov ◽  
N. T. Yugov ◽  
S. A. Afanasyeva ◽  
A. A. Yugov ◽  
O. Yu. Fedosov ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
High Speed

scholarly journals DYNAMIC BEHAVIOR OF REINFORCED CONCRETE COLUMN UNDER ACCIDENTAL IMPACT

2021 ◽  
Vol 17 (3) ◽  
pp. 120-131
Author(s):  
Sergey Savin ◽  
Vitaly Kolchunov
Keyword(s):  
Reinforced Concrete ◽  
Analytical Solution ◽  
High Speed ◽  
Impact Load ◽  
Dynamic Buckling ◽  
Shock Load ◽  
Dynamic Factor ◽  
Physical Parameters ◽  
Concrete Column ◽  
Reinforced Concrete Column

The analysis of scientific literature shows that to date, the physical parameters of the deformation of reinforced concrete bar structures during their dynamic buckling and the influence of the dissipative properties of the structural system on this process remain insufficiently studied. In this regard, the paper proposes an analytical solution to the problem of dynamic buckling of a reinforced concrete column when it is loaded with an impact load, taking into account the presence of initial geometric and (or) physical imperfections and damping properties of the system, as well as an analysis and assessment of the column deformationparameters based on the obtained analytical solution. An expression for the dynamic deflection of a bar element under its axial loading with a high-speed shock load, taking into account damping, is obtained in an analytical form. For practical calculations in a quasi-static formulation, the paper proposes an expression for the dynamic factor kd of bar structures under axial shock load. A numerical example of calculating a reinforced concrete column using the obtained analytical expressions with and without damping is considered. It was found that the maximum deflection of the elastic axis of the column under high-speed loading was achieved at t = 0.04 s. In this case, the total dynamic deflection taking into account damping was 4.8% less than the deviation without taking into account damping and 1.18 times more than the corresponding static value.

scholarly journals Study on the Composite Structure of Aluminum Foam-Filled Thin-Walled Metal Tube to Reduce the Charge Overload inside the Projectile during the Penetration Process

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Fudi Liang ◽  
Zengyou Liang ◽  
Dezhi Deng
Keyword(s):  
Reinforced Concrete ◽  
Stress Analysis ◽  
Composite Structure ◽  
High Speed ◽  
Aluminum Foam ◽  
Metal Tube ◽  
Penetration Process ◽  
Mathematical Expressions ◽  
Foam Filled ◽  
Thin Walled

When a projectile penetrates a target at high speed, the charge loaded inside the projectile usually bears a high overload, which will consequently severely affect its performance. In order to reduce the overload of the charge during the penetration process, the structure of the projectile was improved by adding two buffers at both ends of the charge. In this study, the mathematical expressions were first gained about the axial buffering force generated by the thin-walled metal tube, aluminum foam, and the composite structure of aluminum foam-filled thin-walled metal tube when they were impacted by the high-speed mass block through reasonable assumptions and stress analysis. During the experiment on the high-speed projectile penetrating reinforced concrete target, the acceleration curve of the charge and the projectile body were obtained. The results show that the maximum overload that the charge was subjected to during the launch and penetration process was significantly reduced, and the change in overload, which the charge was subjected to during the penetration process, was also less obvious.

Strength and Deformation of Combined Beams with Side Reinforced Plates

2019 ◽  
Vol 968 ◽  
pp. 234-239
Author(s):  
Talyat Azizov ◽  
Oleksii Melnik ◽  
Oleksandr Myza
Keyword(s):  
Experimental Data ◽  
Reinforced Concrete ◽  
Experimental Studies ◽  
Calculated Data ◽  
Concrete Plate ◽  
Combined Action ◽  
Strength And Deformation ◽  
Concrete Plates ◽  
Good Agreement

The results of experimental studies of combined beams consisting of a stone part, reinforced with side reinforced concrete plates are given. Experimentally shown the viability of the proposed structures. The conditions for ensuring the combined action of a stone beam and a reinforced concrete plate are given. Cases are shown when one-sided plates can be used and when double-sided reinforced concrete plates can be used. A comparison of experimental data with the data calculated by the authors developed methods is given. A good agreement between theoretical and calculated data is shown.

scholarly journals Strengthening of a railway arch bridge from 1854

2018 ◽  
Vol 199 ◽  
pp. 10004
Author(s):  
Ole Viggo Andersen
Keyword(s):  
Reinforced Concrete ◽  
High Speed ◽  
Timber Structure ◽  
Construction Site ◽  
Construction Work ◽  
Arch Bridge ◽  
Freeze Thaw ◽  
Creek Water ◽  
Bottom Slab ◽  
Working Processes

This paper presents the inspection of the condition and the design for strengthening of an existing railway arch bridge constructed in 1854. The original arch bridge is constructed with 5 layers of bricks in the arch and granite blocks in the foundation on top of an arrangement of frame made of timber and carried by piles. From the inspection it was concluded that the bricks in the arch was damaged due to freeze-thaw. It was also concluded that the timber structure in the foundation was rotten. The bridge is crossing a small creek. The environment is very sensitive. The access to the construction site is passing through landscape subject to preservation. The strengthening project included the arrangement of a new reinforced concrete arch. The arch was anchored with glued reinforcement bonded to the existing brick arch. The reinforcement and formwork was placed above the creek without disturbing the fauna in the water. The concrete was pumped into a form under the existing arch. After curing of the concrete arch, the strengthening of the foundation was initiated. It was planned to construct a bottom slab under the creek, which was able to carry the new concrete arch. In order to get access for the construction work the creek water was pumped through pipes suspended under the top of the new concrete arch. The procedures to handle the very delicate situation of replacing the foundation, while the bridge was in operation, and also protecting the environment is described in detail in the presentation. The process included high speed concrete curing, working processes under extreme narrow conditions and a very tight schedule.

Sign in / Sign up

Export Citation Format

Share Document