Numerical Modeling of Buried Box Conduits: Investigating the Effect of Surface Footing Loading
摘要
This paper focuses on performance of buried box conduits subjected to surface loading. To this end, the effect of various factors was investigated on the behavior of these structures. Although many researchers studied the performance of these structures, there is still a significant lack of understanding on how conduits behave, particularly in relation to the position of applied surface loads. To address this gap, finite element (FE) analyses was performed using ABAQUS software under plane strain condition to study the effect of burial depth, conduit width, surface footing pressure, footing width, and the way these factors interacted with the footing position. The results demonstrated the impact of each parameter on the transmitted pressure and the bending moments experienced by the conduit’s top wall. Variations in burial depth and conduit dimensions significantly altered pressure distribution and bending moment. A fourfold increase in conduit width resulted in a 36-fold rise in the bending moment. In addition, tripling the footing width resulted in an increase of the minimum pressure at the upper slab’s midpoint from 68 to 109 kPa. Additionally, the study highlighted the need of considering the footing’s relative position to the conduit axis, since this significantly influenced the observed behaviors.