Abstract
This paper proposes a prefabricated basalt fiber reinforced polymer (BFRP) bars reinforcement of a concrete arch structure with superior performance in the field of protection engineering. To study the anti-blast performance of the shallow-buried BFRP bars concrete arch (BBCA), a multi-parameter comparative analysis was conducted employing the LS-DYNA numerical method, which was verified by the results of the field explosion experiments. By analyzing the pressure, displacement, acceleration of the arch, and the strain of the BFRP bars, the dynamic response of the arch was obtained. This study showed that BFRP bars could significantly optimize the dynamic responses of blast-loaded concrete arches. The damage of exploded BBCA was divided into five levels: no damage, slight damage, obvious damage, severe damage, and collapse. BFRP bars could effectively mitigate the degree of damage of shallow-buried underground protective arch structures under the explosive loads. According to the research results, it was feasible for BFRP bars to be used in the construction of shallow buried concrete protective arch structures, especially in the coastal environments.
Highlights
As important structural members, reinforced concrete arches are widely used in underground protective structures [1,2,3]
basalt fiber reinforced polymer (BFRP) bars were selected as the reinforcement material to strengthen the an economical and reasonable for simulation improving the anti-blast concrete archdesign structure,basis and various conditions were designedperformance to investigate the of influences of multiple factors
The model consists of five material parts: air, TNT, soil, concrete, and BFRP bars [28]
Summary
As important structural members, reinforced concrete arches are widely used in underground protective structures [1,2,3]. BFRP bars were selected as the reinforcement material to strengthen reveal the dynamic responses of structures under the action of explosive loads by accurately the concrete arch structure, and various conditions were investicontrolling each explosionsimulation variable [26]. By combining the experimental and the numerical common structures in engineering [27], some researchers conducted limited anti-explosion simulation results, a more comprehensive was conducted toresponse study laws the of dynamic experiments, but they couldanalysis not well summarize the dynamic reinforced concrete arches. BFRP bars were selected as the reinforcement material to strengthen the an economical and reasonable for simulation improving the anti-blast concrete archdesign structure,basis and various conditions were designedperformance to investigate the of influences of multiple factors. Model and reasonable design basis for improving the anti-blast performance of arch structures in protective engineering
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