Seismic Performance of Shear Connections in Fiber-Reinforced Strain-Hardening Cement Composite (SHCC) Under Cyclic Loading

2012 ◽  
Vol 13 (1) ◽  
pp. 251-256
Author(s):  
K. H. Yun ◽  
H. D. Yun ◽  
S. H. Ryu
Keyword(s):  
Cyclic Loading ◽  
Strain Hardening ◽  
Seismic Performance ◽  
Cement Composite ◽  
Fiber Reinforced ◽  
Shear Connections

Shear behavior of strain-hardening cement composite walls under quasi-static cyclic loading

2017 ◽  
Vol 143 ◽  
pp. 398-409 ◽  
Author(s):  
Hyun-Do Yun ◽  
Sun-Woo Kim ◽  
Wan-Shin Park ◽  
Young-Il Jang
Keyword(s):  
Cyclic Loading ◽  
Strain Hardening ◽  
Cement Composite ◽  
Shear Behavior ◽  
Composite Walls

scholarly journals Feasibility of Reduced Lap-Spliced Length in Polyethylene Fiber-Reinforced Strain-Hardening Cementitious Composite

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Wonchang Choi ◽  
Seok-Joon Jang ◽  
Hyun-Do Yun
Keyword(s):  
Strain Hardening ◽  
Cement Composite ◽  
Cementitious Composite ◽  
Fiber Reinforced ◽  
Interfacial Behavior ◽  
Reinforcing Bars ◽  
Cracking Behavior ◽  
Lap Splice ◽  
Cyclic Tension ◽  
Polyethylene Fiber

This research investigates the interfacial behavior between polyethylene (PE) fiber-reinforced strain-hardening cement composite (PE-SHCC) and reinforcing bars that are spliced in the tension region to determine feasibility of reduced lap-spliced length in PE-SHCC. Twenty test specimens were subjected to monotonic and cyclic tension loads. The variables include the replacement levels of an expansive admixture (0% and 10%), the compressive strength of the SHCC mixtures (40 MPa and 80 MPa), and the lap-spliced length in the tension region (40% and 60% of the splice length recommended by ACI 318). The PE-SHCC mixture contains polyethylene fiber to enhance the tensile strength, control the widths of the cracks, and increase the bond strength of the lap splice reinforcement and the calcium sulfo-aluminate- (CSA-) based expansive admixture to improve the tension-related performance in the lap splice zone. The results have led to the conclusion that SHCC mixtures can be used effectively to reduce the development length of lap splice reinforcement up to 60% of the splice length that is recommended by ACI 318. The addition of the calcium sulfo-aluminate-based expansive admixture in the SHCC mixtures improved the initial performance and mitigated the cracking behavior in the lap splice region.

Damage Tolerance of Reinforced Concrete (RC) Beams with a Layer of PE Fiber Reinforced Strain-Hardening Cement Composite (PE-SHCC)

2013 ◽  
Vol 372 ◽  
pp. 219-222
Author(s):  
Yeon Jun Yun ◽  
Seok Joon Jang ◽  
Hyun Do Yun
Keyword(s):  
Reinforced Concrete ◽  
Strain Hardening ◽  
Volume Fraction ◽  
Cement Composite ◽  
Rc Beam ◽  
Rc Beams ◽  
Fiber Reinforced ◽  
Cracking Behavior ◽  
Flexural Performance ◽  
Strength And Ductility

This work evaluated the applicability of polyethylene (PE) fiber reinforced strain-hardening cement composite (PE-SHCC) layer at the bottom of reinforced concrete (RC) beams to improve the flexural performance and cracking behavior. PE-SHCC material with specific compressive strength of 70MPa was reinforced with 1.5% PE fibers at the volume fraction. Four RC beams with cross-section of 130 x 170mm and length of 1,460mm were made and tested under four-point monotonic loading. Three beams were layered with PE-SHCC material and one whole RC beam was a control specimen for comparison. Principal variable is the thickness of PE-SHCC layer; 20, 40 and 60mm that are equivalent to 11, 23 and 35% of beams depth. Experimental results indicated that the addition of PE-SHCC layer enhanced the crack-damage mitigation of RC beams and improve the structural behavior, such as strength and ductility, of RC beams.

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