Experimental and numerical study on the seismic performance of steel‐polyvinyl alcohol hybrid fiber‐reinforced concrete shear walls

The fault-crossing tunnel in meizoseismal area is directly subjected to strong ground motion, which leads to the failure of the tunnel lining. In order to improve the seismic safety of tunnel, fiber-reinforced concrete is applied to tunnel lining in this article. Taking the section of Zhongyi tunnel crossing Wanlong fault as an example, seismic performance of fiber-reinforced concrete tunnel lining was studied by finite difference numerical calculation software FLAC3D. The seismic displacement, stress response, and side wall convergence of secondary lining structures which are plain concrete, steel fiber-reinforced concrete, and steel-basalt hybrid fiber-reinforced concrete were comparatively analyzed. Moreover, the safety factor of each lining structure was investigated with the present numerical model. With the obtained data, seismic performance of steel-basalt hybrid fiber-reinforced concrete secondary lining is better than that of steel fiber-reinforced concrete secondary lining. The results may provide references for seismic design of fault-crossing tunnels in meizoseismal area.

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Experimental investigation on the seismic performance of steel–polypropylene hybrid fiber reinforced concrete columns

Construction and Building Materials ◽

10.1016/j.conbuildmat.2015.03.073 ◽

2015 ◽

Vol 87 ◽

pp. 16-27 ◽

Cited By ~ 39

Author(s):

Le Huang ◽

Lihua Xu ◽

Yin Chi ◽

Haoran Xu

Keyword(s):

Experimental Investigation ◽

Reinforced Concrete ◽

Seismic Performance ◽

Concrete Columns ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced ◽

Hybrid Fiber ◽

Reinforced Concrete Columns

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Experimental and numerical study on damage evaluation of hybrid fiber-reinforced concrete

Asian Journal of Civil Engineering ◽

10.1007/s42107-019-00141-1 ◽

2019 ◽

Vol 20 (5) ◽

pp. 745-758 ◽

Cited By ~ 4

Author(s):

Radhika Kala Sridhar ◽

Ravi Prasad

Keyword(s):

Reinforced Concrete ◽

Numerical Study ◽

Fiber Reinforced Concrete ◽

Damage Evaluation ◽

Fiber Reinforced ◽

Hybrid Fiber

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Experimental Study on Hybrid Effect Evaluation of Fiber Reinforced Concrete Subjected to Drop Weight Impacts

Materials ◽

10.3390/ma11122563 ◽

2018 ◽

Vol 11 (12) ◽

pp. 2563 ◽

Cited By ~ 14

Author(s):

Jun Feng ◽

Weiwei Sun ◽

Hongzhou Zhai ◽

Lei Wang ◽

Haolin Dong ◽

...

Keyword(s):

Reinforced Concrete ◽

Polyvinyl Alcohol ◽

Impact Energy ◽

Steel Fiber ◽

Fiber Reinforced Concrete ◽

Fiber Reinforced ◽

Hybrid Fiber ◽

Hybrid Effect ◽

Polyvinyl Alcohol Fiber ◽

The Impact

In this paper, the impact energy potential of hybrid fiber reinforced concrete (HFRC) was explored with different fiber mixes manufactured for comparative analyses of hybridization. The uniaxial compression and 3-point bending tests were conducted to determine the compressive strength and flexural strength. The experimental results imply that the steel fiber outperforms the polypropylene fiber and polyvinyl alcohol fiber in improving compressive and flexural strength. The sequent repeated drop weight impact tests for each mixture concrete specimens were performed to study the effect of hybrid fiber reinforcement on the impact energy. It is suggested that the steel fiber incorporation goes moderately ahead of the polypropylene or polyvinyl alcohol fiber reinforcement in terms of the impact energy improvement. Moreover, the impact toughness of steel-polypropylene hybrid fiber reinforced concrete as well as steel-polyvinyl alcohol hybrid fiber reinforced concrete was studied to relate failure and first crack strength by best fitting. The impact toughness is significantly improved due to the positive hybrid effect of steel fiber and polymer fiber incorporated in concrete. Finally, the hybrid effect index is introduced to quantitatively evaluate the hybrid fiber reinforcement effect on the impact energy improvement. When steel fiber content exceeds polyvinyl alcohol fiber content, the corresponding impact energy is found to be simply sum of steel fiber reinforced concrete and polyvinyl alcohol fiber reinforced concrete.

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