scholarly journals Falling weight impact response of prestressed concrete slabs with manhole

2018 ◽  
Vol 396 ◽  
pp. 012010
Author(s):  
Sharoan Merin Mathews ◽  
Nikhil Mohanan ◽  
Manish Jose
Keyword(s):  
Prestressed Concrete ◽  
Impact Response ◽  
Concrete Slabs ◽  
Weight Impact ◽  
Falling Weight

Numerical Simulation of Impact Response Behavior of Rectangular Reinforced Concrete Slabs under Falling-Weight Impact Loading

2011 ◽  
Vol 82 ◽  
pp. 266-271 ◽  
Author(s):  
Norimitsu Kishi ◽  
Yusuke Kurihashi ◽  
Sara Ghadimi Khasraghy ◽  
Hiroshi Mikami
Keyword(s):  
Reinforced Concrete ◽  
Numerical Analysis ◽  
Impact Loading ◽  
Dynamic Responses ◽  
Concrete Slabs ◽  
Analysis Method ◽  
Numerical Analysis Method ◽  
Reinforced Concrete Slabs ◽  
Weight Impact ◽  
Falling Weight

A numerical analysis method for rectangular reinforced concrete slabs under falling-weight impact loading is established. The proposed method using finite element analysis incor-porates a simple constitutive model for concrete elements. The applicability was investigatedcomparing the numerical results with the experimental data. Falling-weight impact tests wereconducted on reinforced concrete slabs with different supporting conditions. These were: a slabwith line supports on four sides; a slab with two line supports on two opposite sides (the othertwo sides were free); and a slab with one line and two corner-point supports. Following resultswere obtained from this study: (1) the time histories of dynamic responses are well predictedby using proposed numerical analysis method; (2) maximum reaction forces and the maximumdeflections in the slab center below the loading point, and characteristics of the damped freevibration after falling weight was rebounded, can be better predicted; and (3) major crackpatterns can be roughly predicted despite of support conditions.

scholarly journals Microstructure Related Fracture Behavior of a Discontinuous Polymer-Polymer Microlayer Composite

1993 ◽  
Vol 2 (4) ◽  
pp. 096369359300200 ◽  
Author(s):  
Q. Yuan ◽  
J. Karger-Kocsis ◽  
K. Friedrich ◽  
M. Grosso
Keyword(s):  
Light Microscopy ◽  
High Density Polyethylene ◽  
Fracture Behavior ◽  
Impact Resistance ◽  
High Impact ◽  
Impact Response ◽  
Out Of Plane ◽  
Impact Bending ◽  
Weight Impact ◽  
Falling Weight

The fracture behavior of a discontinuous microlayer polymer-polymer composite was studied at −40 °C on notched Charpy specimens and unnotched plates in instrumented impact bending and falling weight impact tests, respectively. The microstructure of the specimens, containing discontinuous layers of modified polyamide (PA; Selar®, Du Pont), more or less uniformly stacked and well overlapping, in a high-density polyethylene (HDPE) matrix, was assessed by light microscopy. Failure mode of the microlayered specimens was studied by fractography. It was concluded that the in-plane impact response of this discontinuous microlayer composite is superior to the out-of-plane one. In addition, a fine and regular microstructure imparts to a high impact resistance.

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