scholarly journals AN EXPERIMENTAL STUDY ON STRUCTURAL FIRE BEHAVIOR OF REINFORCED CONCRETE WALL AFTER HIGH VELOCITY IMPACT OF HARD PROJECTILE

2015 ◽  
Vol 80 (708) ◽  
pp. 357-367
Author(s):  
Takeshi MORITA ◽  
Masuhiro BEPPU ◽  
Makoto SUZUKI
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
High Velocity ◽  
Fire Behavior ◽  
High Velocity Impact ◽  
Concrete Wall ◽  
Velocity Impact ◽  
Structural Fire ◽  
Reinforced Concrete Wall ◽  
Structural Fire Behavior

Crack Propagation and Local Failure Simulation of Reinforced Concrete Subjected to Projectile Impact Using RBSM

2016 ◽  
Author(s):  
Yoshihito Yamamoto ◽  
Soichiro Okazaki ◽  
Hikaru Nakamura ◽  
Masuhiro Beppu ◽  
Taiki Shibata
Keyword(s):  
Reinforced Concrete ◽  
Crack Propagation ◽  
High Velocity ◽  
Failure Modes ◽  
Concrete Structures ◽  
Constitutive Models ◽  
Local Failure ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Projectile Impact

In this paper, numerical simulations of reinforced mortar beams subjected to projectile impact are conducted by using the proposed 3-D Rigid-Body-Spring Model (RBSM) in order to investigate mechanisms of crack propagation and scabbing mode of concrete members under high-velocity impact. The RBSM is one of the discrete-type numerical methods, which represents a continuum material as an assemblage of rigid particle interconnected by springs. The RBSM have advantages in modeling localized and oriented phenomena, such as cracking, its propagation, frictional slip and so on, in concrete structures. The authors have already developed constitutive models for the 3D RBSM with random geometry generated Voronoi diagram in order to quantitatively evaluate the mechanical responses of concrete including softening and localization fractures, and have shown that the model can simulate cracking and various failure modes of reinforced concrete structures. In the target tests, projectile velocity is set 200m/s. The reinforced mortar beams with or without the shear reinforcing steel plates were used to investigate the effects of shear reinforcement on the crack propagation and the local failure modes. By comparing the numerical results with the test results, it is confirmed that the proposed model can reproduce well the crack propagation and the local failure behaviors. In addition, effects of the reinforcing plates on the stress wave and the crack propagation behaviors are discussed from the observation of the numerical simulation results. As a result, it was found that scabbing of reinforced mortar beams subjected to high velocity impact which is in the range of the tests is caused by mainly shear deformation of a beam.

scholarly journals AN EXPERIMENTAL STUDY ON THE LOCAL DAMAGE OF CONCRETE PLATE DUE TO HIGH VELOCITY IMPACT OF STEEL PROJECTILE

2007 ◽  
Vol 63 (1) ◽  
pp. 178-191 ◽  
Author(s):  
Masuhiro BEPPU ◽  
Koji MIWA ◽  
Tomonori OHNO ◽  
Masanori SHIOMI
Keyword(s):  
Experimental Study ◽  
High Velocity ◽  
Local Damage ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Concrete Plate

An experimental study of high-velocity impact on elastic–plastic crushable polyurethane foams

2016 ◽  
Vol 50 ◽  
pp. 245-255 ◽  
Author(s):  
Ali Taherkhani ◽  
Mojtaba Sadighi ◽  
Ali Sadough Vanini ◽  
Mohsen Zarei Mahmoudabadi
Keyword(s):  
Experimental Study ◽  
High Velocity ◽  
Polyurethane Foams ◽  
High Velocity Impact ◽  
Velocity Impact ◽  
Elastic Plastic

Effects of Short Fiber Reinforcement on the Local Damage of Concrete Plates under High Velocity Impact Loading

2011 ◽  
Vol 82 ◽  
pp. 241-246 ◽  
Author(s):  
Masuhiro Beppu ◽  
Charles Abadie ◽  
Jun Takahashi ◽  
Atsuhisa Ogawa
Keyword(s):  
Reinforced Concrete ◽  
High Velocity ◽  
Fiber Reinforcement ◽  
Short Fiber ◽  
Fiber Reinforced Concrete ◽  
Local Damage ◽  
High Velocity Impact ◽  
Fiber Reinforced ◽  
Velocity Impact ◽  
Concrete Plates

This study presents the effects of short fiber reinforcement on the local damage of concrete plates subjected to high velocity impact. In a series of tests, three short fiber composite materials were used. Firstly, static bending tests were conducted to reveal mechanical properties in tension of the short fiber reinforced concrete. Then, high velocity impact tests were carried out to examine the effects of short fiber reinforcement on the local damage of concrete plates. Failure mode and strain behavior on the back surface of the short fiber reinforced concrete plates demonstrated that short fiber reinforcement was very effective in reducing the local damage.

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