首页|Quantitative damage evaluation of galleries under rockfall impact: a generalized pressure‑impulse diagram
Quantitative damage evaluation of galleries under rockfall impact: a generalized pressure‑impulse diagram
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NETL
NSTL
Springer Nature
Galleries are commonly implemented to protect tunnel entrances from rockfall impacts. This study proposes a novel approach for the quantitative damage evaluation of galleries, leveraging a generalized Pressure-Impulse (P-I) diagram. The dynamic responses and damage evolution under the influence of different rockfall mass, velocity, shape, cushion density and thickness are analyzed. On this basis, a displacement-based damage index (D = u/u_d) is formulated and correlated with the mean damage value ψ computed using the validated Concrete Damaged Plasticity (CDP) model. The damage was quantitatively categorized into four levels, with the primary independent control variables identified through dimensionless analysis. Using this method, the damage function and failure modes of the binaural integral galleries are derived. Finally, this method was validated by using single pressure galleries. The findings provide a robust framework for assessing rockfall impacts on galleries.
NETL
NSTL
Springer Nature
