Robust Design of Pile Anchor Structure Considering Economic Optimization and Multiple Failure Modes
The overall influence of the uncertainty of geotechnical parameters on the pile-anchor support system is studied to explore the joint role of economy and robustness.The failure probabilities and standard deviations of different design combinations are obtained by Monte Carlo with point estimate method,taking into the three failure forms of uplift failure,overturn failure and overall stability failure.The robustness optimization design of the pile-anchor support system is selected by considering the economy of the optimization design,by selecting engineering cases in loess areas.With the increase of pile length,the main control mode changes from uplift failure to overall stability failure,as the pile length increases,and different geometrical parameters have an impact on the structural robustness,the optimal design solution can be obtained after optimization to meet the requirements of economy,robustness and reliability.It is important to consider economic optimization and robust design for multiple failure modes in the design of pile anchor structures.
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