# Dynamic Response and Fatigue Study of BFRP-Reinforced Concrete Slabs Under Random Wave Loading

## TL;DR

This study examines how basalt-fiber-reinforced concrete slabs respond dynamically to random wave loads, focusing on how wave period and angle affect structural performance.

## Contribution

The study introduces a novel analytical model and numerical simulations to quantify the effects of wave period and incidence angle on dynamic responses of BFRP concrete slabs.

## Key findings

- Increasing the effective wave period reduces peak displacement, stress, strain, and reinforcement stress in BFRP slabs.
- Higher wave incidence angles significantly increase dynamic response indicators like displacement and stress.
- The growth rate of dynamic response changes non-linearly with wave period and linearly with incidence angle.

## Abstract

To investigate the dynamic response patterns of basalt-fiber-reinforced concrete slabs under random wave loads, this study characterized wave characteristics based on the random wave theory. Numerical simulations of wave loads were conducted using the Morrison equation, and an analytical model for basalt-fiber-reinforced concrete slabs was established. The research systematically examined the influence mechanisms of two key factors—effective wave period and incident angle—on the dynamic properties of such components. The results indicate that when the effective wave period increases from 7 s to 11 s, the peak displacement, peak stress, peak strain, and stress in the basalt-fiber reinforcement of the slab decrease by 12.79 mm, 0.93 MPa, 130 με, and 229.25 MPa, respectively. The growth rate of the component’s dynamic response first increases and then decreases as the effective wave period shortens. When the wave incidence angle increased from 18° to 90°, the peak displacement, peak stress, peak strain, and stress in the basalt-fiber reinforcement of the concrete slab increased by 17.87 mm, 1.32 MPa, 155 με, and 297.97 MPa, respectively. The growth rate of the component’s dynamic response exhibited a continuous increase with the increasing wave incidence angle. At an incidence angle of 18°, the values of the aforementioned four indicators were 576%, 213%, 52.5%, and 46% higher than those under the 90° condition, respectively. The findings of this study provide theoretical support and data references for elucidating the dynamic response patterns of basalt-fiber-reinforced concrete-slab structures under varying wave-loading conditions and for conducting fatigue performance research.