Optimization design of piles subjected to horizontal loads based on reliability theory

Abstract

Based on reliability theory, a general method for the optimization design of piles subjected to horizontal loads is presented. This method takes into consideration various uncertainties caused by pile installation, variability of geotechnical materials from one location to another, and so on. It also deals with behavior and side constraints specified by standard specifications for piles. To more accurately solve the optimization design model, the first order reliability method is employed. The results from the numerical example indicate that the target reliability index has significant influence on design parameters. In addition, the optimization weight increases with the target reliability index. Especially when the target reliability index is relatively large, the target reliability index has significant influence on design weight of piles.

Keywords

reliability-based optimization design / horizontal load / objective function / boundary condition / first order reliability method

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