Introduction

StruBIM Box Culverts is an app for designing and verifying reinforced-concrete box culverts for use in underpasses and drainage structures. It supports rectangular, trapezoidal and freely defined polygonal geometries in both plan and elevation, including both single- and multiple-compartment box culverts.

The program can be used to design both precast box culverts, with defined joints between units, and in-situ reinforced concrete box culverts. The cross-section may comprise multiple cells.

Several design wizards are provided to simplify data entry for the most common cases, including straight, skew and general box culverts.

The structural analysis is based on a three-dimensional thick-shell finite element model that accounts for shear deformation. The elements are six-noded triangular shell elements, with nodes located at the vertices and mid-side positions, each having six degrees of freedom.

The program also allows vehicle load models to be positioned anywhere on the structure, as well as strip loads, slab loads and other user-defined loading conditions.