Reinforced concrete beams under drop-weight impact loads

2006 ◽  
Vol 3 (2_3) ◽  
pp. 79-90 ◽  
Author(s):  
Ian M. May ◽  
Yi Chen ◽  
D. Roger J. Owen ◽  
Y.T. Feng ◽  
Philip J. Thiele
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Impact Loads ◽  
Drop Weight ◽  
Weight Impact

scholarly journals Behavior of fiber-reinforced polymer-strengthened reinforced concrete beams under static and impact loads

2016 ◽  
Vol 8 (1) ◽  
pp. 3-24 ◽  
Author(s):  
Thong M Pham ◽  
Hong Hao
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Fiber Reinforced Polymer ◽  
Impact Loads ◽  
Fiber Reinforced ◽  
Static Loads ◽  
Reinforced Polymer ◽  
Longitudinal Fiber ◽  
The Impact

This study investigates the behavior of fiber-reinforced polymer-strengthened reinforced concrete beams under static and impact loads. The experimental program includes six beams tested in static loads and seven beams tested against impact loads. Longitudinal fiber-reinforced polymer strips and fiber-reinforced polymer U-wraps were used to strengthen these beams. The section of four beams was modified to have a curved soffit in order to reduce the stress concentration of fiber-reinforced polymer U-wraps and provide confinement effect on longitudinal fiber-reinforced polymer strips. The experimental results showed that the proposed modification significantly increased the beam capacities as compared to their rectangular counterparts strengthened with the same amount of fiber-reinforced polymer material. In addition, this article also provides explanations and discussions on the phenomenon of shifting of the flexure failure mode under static loads to the shear–flexure failure mode under impact loads of all the beams tested in the study, as well as the proper interpretations of the measured impact forces in the tests. From the experimental results, it is recommended that the impact force and inertial force at the very early stage of an impact event should be used to design the impact resistance.

The effect of assembling location on the performance of precast concrete beam under impact load

2017 ◽  
Vol 21 (8) ◽  
pp. 1211-1222 ◽  
Author(s):  
Qiushi Yan ◽  
Bowen Sun ◽  
Xuemei Liu ◽  
Jun Wu
Keyword(s):  
Reinforced Concrete ◽  
Impact Velocity ◽  
Concrete Beam ◽  
Concrete Beams ◽  
Impact Load ◽  
Precast Concrete ◽  
Reinforced Concrete Beams ◽  
Impact Location ◽  
Weight Impact ◽  
The Impact

With incorporation of assembling joints, precast concrete beams could behave very differently in resisting both static and dynamic loads in comparison to conventional reinforced concrete beams. With no research available on the dynamic behavior of precast concrete beams under impact load, a combined experimental and numerical study is conducted to investigate the dynamic response of precast concrete beams under impact load. The results were also compared with reinforced concrete beams. Four groups of concrete beams were tested with all beams designed with the same reinforcement, but different assembling locations were considered for precast concrete beams. The effects of the assembling location in resisting drop weight impact of precast concrete beams were analyzed. The influence of impact mass and impact velocity on the impact resistance of precast concrete beams were also investigated. The results revealed that the further the assembling location is away from the impact location, the closer the mechanical performance of the precast concrete beam is to that of the reinforced concrete beam. When the assembling location and the impact location coincided, the assembling region suffered from severe local damages. With increased impact velocity and impact energy, the damage mode of the precast concrete beams may change gradually from bending failure to bending–shear failure and eventually to local failure. In addition, the bonding around the assembling interface was found to be effective to resist drop weight impact load regardless of the magnitude of the impact velocity and energy.

The Fracture of Reinforced Concrete under Impact Loading

1985 ◽  
Vol 64 ◽  
Author(s):  
Arnon Bentur ◽  
Sidney Mindess ◽  
N. Banthia
Keyword(s):  
Reinforced Concrete ◽  
Impact Loading ◽  
Concrete Beams ◽  
Steel Reinforcement ◽  
Drop Height ◽  
Reinforcing Bars ◽  
Drop Weight ◽  
Weight Impact ◽  
Concrete Matrix

ABSTRACTThe behaviour under impact loading of concrete beams, reinforced with both smooth and deformed steel reinforcing bars, was studied. Tests were carried out using an instrumented drop-weight impact apparatus, with a 345 kg mass hammer, and drop heights of up to 2.36 m. It was found that, under certain circumstances, the steel reinforcement itself fractured. This behaviour is discussed with reference to the drop height, the type of reinforcement, and the strength of the concrete matrix.

An Experimental Study of Reinforced Concrete Beams with Artificial Aggregate Concrete Infill Under Impact Loads

InCIEC 2014 ◽  
2015 ◽  
pp. 691-701 ◽  
Author(s):  
Shahrul Niza Mokhatar ◽  
Zainorizuan Mohd Jaini ◽  
Mohd Khairy Burhanudin ◽  
Mohamad Luthfi Ahmad Jeni ◽  
Mohd Nasrul Naim Ismail
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Impact Loads ◽  
Aggregate Concrete
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