Recommendations for Designing Reinforced Concrete Beams Against Low Velocity Impact Loads

2018 ◽  
Vol 18 (09) ◽  
pp. 1850104 ◽  
Author(s):  
Piyapong Wongmatar ◽  
Chayanon Hansapinyo ◽  
Vanissorn Vimonsatit ◽  
Wensu Chen
Keyword(s):  
Reinforced Concrete ◽  
Impact Load ◽  
Reaction Force ◽  
Reinforced Concrete Beams ◽  
Low Velocity Impact ◽  
Inertia Force ◽  
Impact Loads ◽  
Rc Beams ◽  
Low Velocity ◽  
Velocity Impact

This study investigates the behaviors of simply supported reinforced concrete (RC) beams subjected to impact loads. A numerical model of RC beams has been calibrated and a total of 18 RC beams with varying longitudinal reinforcement, transverse shear reinforcement, span and effective depth are investigated, subjected to different input impact energy. It is found that inertia force plays an important role in resisting an impact load at the starting time. The slenderness of the beam can cause increased downward reaction force and also amplifies the upward reaction force. Based on the numerical results, recommendations are made for designing RC beams under low velocity impact load. A formula is derived to predict the maximum mid-span deflection under low velocity impact load with respect to the kinetic energy and static bending capacity. The maximum spacing and the diameter of stirrups are also recommended so as to avoid the brittle failure under impact load.

scholarly journals Low-Velocity Impact Load Testing of RC Beams Strengthened in Flexure with Bonded FRP Sheets

2020 ◽  
Vol 24 (5) ◽  
pp. 04020036 ◽  
Author(s):  
Norimitsu Kishi ◽  
Masato Komuro ◽  
Tomoki Kawarai ◽  
Hiroshi Mikami
Keyword(s):  
Impact Load ◽  
Low Velocity Impact ◽  
Rc Beams ◽  
Load Testing ◽  
Low Velocity ◽  
Velocity Impact

scholarly journals Overload damage mechanisms of GFRP-RC beams subjected to high-intensity low-velocity impact loads

2020 ◽  
Vol 233 ◽  
pp. 111578 ◽  
Author(s):  
Zein Saleh ◽  
M. Neaz Sheikh ◽  
Alex Remennikov ◽  
Abheek Basu
Keyword(s):  
High Intensity ◽  
Low Velocity Impact ◽  
Impact Loads ◽  
Rc Beams ◽  
Low Velocity ◽  
Damage Mechanisms ◽  
Velocity Impact

Study on Response of Reinforced Concrete Beam under Accidental Impact by Piece Part Model

2011 ◽  
Vol 99-100 ◽  
pp. 293-299
Author(s):  
De Rong Wang ◽  
Shu Fang Feng ◽  
Hao Lu
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beam ◽  
Contact Region ◽  
Local Deformation ◽  
Low Velocity Impact ◽  
Inertia Force ◽  
Reinforced Concrete Structure ◽  
Low Velocity ◽  
Velocity Impact ◽  
Part Model

At present, there exist many simple and reliable methods to describe the damage degree of reinforced concrete structure induced by low velocity impact. However, the actual fracture process can not be well reflected by the current methods. Therefore, a piece part model, which can well describe the damage process, was put forward. The cracks generated in the concrete beam can be reflected by the interfaces between the elements. In this method, the beam is descretized as the linking system of the steel bar and concrete. The dynamic calculating equation of the beam is deduced on the basis of the internal force and inertia force of the rigid unit and linking piece. The local deformation in the contact region of the beam and the stress-strain state of the beam under low velocity impact can also be calculated by this method. Finally, the advantages of the model were proved by a practice example.

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