A BO-LSTM-Based Rapid Evaluation Method of PCCP Structural Safety under Falling Rock Impacts.

The buried prestressed concrete cylinder pipe (PCCP) in mountainous areas easily suffers from geological disasters such as falling rocks, which result in leakage, pipe explosion and other structural safety issues. According to engineering practice, a "rock–soil-pipe" finite element model of buried PCCPs impacted by spherical falling rocks is established in this paper. The PCCP structural response to the impacts of falling rocks under different parameter settings is calculated. Taking the maximum plastic damage value of PCCP concrete cores as the evaluation index, an intelligent evaluation model of PCCP structural safety under falling rock impacts is built based on the Bayesian Optimization-Long Short-Term Memory (BO-LSTM) model. The constructed model is used to quickly predict the damage caused by falling rocks to the PCCP structure after the disaster. Meanwhile, the model provides support for the implementation of subsequent engineering measures. The study results show that the BO-LSTM-based intelligent evaluation model can accurately predict the PCCP structural damage caused by falling rock impacts, and it has practical application value. [ABSTRACT FROM AUTHOR]