Numerical study on Ultra High Performance Fiber Reinforced concrete for application in shear walls with boundary elements

Document Type : Research Article

Authors

1 Civil Engineering Department, Amirkabir University of Technology

2 Department of Civil & Environmental Engineering Amirkabir University of Technology (Tehran, Polytechnic)

Abstract

The negative issues of concrete structures include the large dimensions of concrete members due to the low resistance of concrete compared to steel structures, the high density of reinforcements in some parts, and the brittle behavior of concrete due to weakness in tension. The use of fine aggregate and a lower water-to-cement ratio increases the strength, adding fibers to high-strength UHPC concrete increases the softness and tensile strength of concrete, which is called high-strength concrete with UHPFRC fibers with a compressive strength up to 200 MPa and a tensile strength of up to 14 Mpa.

In this research, a technique for the numerical modeling of UHPC concrete is proposed using the LS-DYNA finite element software and modifying the tensile part of a normal concrete material model and the available test data. The validated LS-DYNA model is used to study this concrete on the cyclic behavior of short and thin shear walls. The use of this concrete in the boundary element of the walls has a significant effect in improving their seismic behavior. In this research, the effects of different parameters were investigated. It will be shown that an increment in the percentage of fibers up to 3%, the wall's lateral resistance and initial stiffness increase significantly.

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Amirkabir Journal of Civil Engineering

Articles in Press, Accepted Manuscript
Available Online from 03 October 2024

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