scholarly journals ANALYSIS OF DELAMINATION BEHAVIOR AT CONVENTIONAL REPAIRED BOUNDARY OF HONEYCOMBING OF RC BEAMS AND EFFECTIVENESS OF PROPOSED REPAIR METHOD BY CYCLIC LOADING TEST

2015 ◽  
Vol 71 (4) ◽  
pp. 365-384
Author(s):  
Naomi SASAKI ◽  
Kaoru KOBAYASHI ◽  
Kenichiro NAKARAI
Keyword(s):  
Cyclic Loading ◽  
Rc Beams ◽  
Loading Test ◽  
Cyclic Loading Test ◽  
Repair Method ◽  
Delamination Behavior

Experimental evaluation of cyclic loading test procedure including gravity load on RC beams

2019 ◽  
Vol 20 (4) ◽  
pp. 1292-1306 ◽  
Author(s):  
Helisa Muhaj ◽  
Carla Marchão ◽  
Válter Lúcio ◽  
Rita Gião
Keyword(s):  
Cyclic Loading ◽  
Experimental Evaluation ◽  
Test Procedure ◽  
Rc Beams ◽  
Loading Test ◽  
Cyclic Loading Test ◽  
Gravity Load

CYCLIC LOADING TEST OF REINFORCED CONCRETE (RC) BEAMS INCORPORATING ALTERNATIVE CEMENTITIOUS MATERIALS

2020 ◽  
Vol 7 (2) ◽  
Author(s):  
Isamu Yoshitake ◽  
Shun Inoue ◽  
Kota Motoyoshi
Keyword(s):  
Cyclic Loading ◽  
Cementitious Materials ◽  
Bending Test ◽  
Water Tank ◽  
Rc Beams ◽  
Loading Test ◽  
Cyclic Loading Test ◽  
Slag Powder ◽  
Fatigue Durability ◽  
Furnace Slag

The focus of this study is to examine flexural fatigue durability of RC beams, which were made with various cementitious materials. The cementitious materials tested in this study were blast furnace slag powder, fly-ash, silica-fume, and an artificial admixture of rich SiO2 and Al2O3. Fifteen RC beams for each admixture were prepared in addition to a control mixture (without admixture). The dimensions of the RC beams without stirrups were 160 x 160 x 1200 mm. Three beams for each mixture were soaked into a water-tank until the cyclic loading test. The study conducted static and cyclic four-points bending test. The paper aims to report the effect of the alternative cementitious materials on the fatigue durability of RC beams, which were exposed to the dry and wet environmental conditions.

Discrete element modeling of deformable pinewood chips in cyclic loading test

2019 ◽  
Vol 345 ◽  
pp. 1-14 ◽  
Author(s):  
Yidong Xia ◽  
Zhengshou Lai ◽  
Tyler Westover ◽  
Jordan Klinger ◽  
Hai Huang ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Discrete Element ◽  
Discrete Element Modeling ◽  
Loading Test ◽  
Cyclic Loading Test ◽  
Element Modeling

scholarly journals Biomechanical comparison of medial sustainable nail and proximal femoral nail antirotation in the treatment of an unstable intertrochanteric fracture

2020 ◽  
Vol 9 (12) ◽  
pp. 840-847
Author(s):  
Shaobo Nie ◽  
Ming Li ◽  
Hui Ji ◽  
Zhirui Li ◽  
Wenwen Li ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Torsional Stiffness ◽  
Proximal Femoral Nail ◽  
Axial Stiffness ◽  
Intertrochanteric Fractures ◽  
Loading Test ◽  
Cyclic Loading Test ◽  
Femoral Nail ◽  
Unstable Intertrochanteric Fracture ◽  
The Mean

Aims Restoration of proximal medial femoral support is the keystone in the treatment of intertrochanteric fractures. None of the available implants are effective in constructing the medial femoral support. Medial sustainable nail (MSN-II) is a novel cephalomedullary nail designed for this. In this study, biomechanical difference between MSN-II and proximal femoral nail anti-rotation (PFNA-II) was compared to determine whether or not MSN-II can effectively reconstruct the medial femoral support. Methods A total of 36 synthetic femur models with simulated intertrochanteric fractures without medial support (AO/OTA 31-A2.3) were assigned to two groups with 18 specimens each for stabilization with MSN-II or PFNA-II. Each group was further divided into three subgroups of six specimens according to different experimental conditions respectively as follows: axial loading test; static torsional test; and cyclic loading test. Results The mean axial stiffness, vertical displacement, and maximum failure load of MSN-II were 258.47 N/mm (SD 42.27), 2.99 mm (SD 0.56), and 4,886 N (SD 525.31), respectively, while those of PFNA-II were 170.28 N/mm (SD 64.63), 4.86 mm (SD 1.66), and 3,870.87 N (SD 552.21), respectively. The mean torsional stiffness and failure torque of MSN-II were 1.72 N m/° (SD 0.61) and 16.54 N m (SD 7.06), respectively, while those of PFNA-II were 0.61 N m/° (SD 0.39) and 6.6 N m (SD 6.65), respectively. The displacement of MSN-II in each cycle point was less than that of PFNA-II in cyclic loading test. Significantly higher stiffness and less displacement were detected in the MSN-II group (p < 0.05). Conclusion The biomechanical performance of MSN-II was better than that of PFNA-II, suggesting that MSN-II may provide more effective mechanical support in the treatment of unstable intertrochanteric fractures. Cite this article: Bone Joint Res 2020;9(12):840–847.

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