<p>With the advancement of manufacturing technologies for pipes, different types of corrugated pipes have been invented and introduced into the market. Numerical modeling is a powerful tool to investigate behaviors of corrugated pipes in soil, especially for evaluating pipe-soil interaction. However, numerical models of corrugated pipes in soil with all details of corrugates are typically too complex to be created and calculated. In addition, section properties of those corrugated pipes (i.e., cross-sectional area and moment of inertia) are also difficult to determine accurately using existing indirect methods, which could influence the accuracy of numerical results, particularly for the pipe-soil interaction. In this study, a simplified method was proposed to simplify corrugated pipes as solid wall pipes with equivalent section properties, which was then incorporated into numerical models to investigate pipe behaviors and pipe-soil interaction. Measured data in literature both from laboratory and field tests was used to validate the proposed method. Comparisons of the measured and calculated results using the proposed equivalent method in this study demonstrate that the proposed equivalent method is effective to simulate the performance of corrugated pipes in soil.</p>