EVALUATION OF STRESS OF BOX CULVERT FOR AGRICULTURAL DAM

Authors

  • Phuong Hong Le 1 The United Graduate School of Agricultural, Gifu University, Gifu, Japan, 4 Faculty of Civil Engineering, Thuyloi University, Hanoi, Vietnam
  • Shin-ichi Nishimura Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
  • Tatsuro Nishiyama Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan;
  • Chen Fang Department of Civil Engineering, Yancheng Institute of Technology, Yancheng, China;
  • Thai Canh Nguyen Faculty of Civil Engineering, Thuyloi University, Hanoi, Vietnam

Keywords:

Box culvert, 2D FEM, 3D FEM, Tensile stress, Soft foundation, Soil arching, Agricultural dam

Abstract

The current design for culverts is based on a two-dimensional analysis and only addresses the
internal forces of the culvert members in the cross-section. The stress of a culvert in the direction of the culvert
axis has not been given much attention; thus, there are no specific guidelines or provisions for it in the current
standards. In the case of a culvert under a fill-dam placed on a soft foundation, the differences in settlement
along the culvert axis may cause bending stress or tensile stress at the bottom of the culvert in the culvert axis
direction. When this stress is beyond the capacity of the culvert material, excessive deformation and cracks in
the culvert can occur. In the present study, this issue was explored through both two-dimensional (2D) and
three-dimensional (3D) finite element methods (FEMs). This study reveals that the 2D plane strain FEM,
although it can model with soil-structure interaction, it is incapable of recognizing stress along the culvert axis.
In contrast, the 2D plane strain FEM can determine that stress but can not consider the influence of soilstructure interaction. Meanwhile, the 3D FEM provides excellent soil-structure interaction and considers the
actual shape of the structures. Based on the results, it was shown that the 2D FEM is unreliable in its assessment
of the tensile stress along the culvert axis compared to the 3D FEM when the box culvert was placed on a soft,
deep foundation. The findings also revealed that when the foundation was soft (the stiffness of the foundation
was low), other parameters such as the height of the dam and the depth of the foundation had a significant
effect on the tensile stress at the bottom of the box culvert in the direction of the culvert axis.

Downloads

Published

2021-01-29

How to Cite

Phuong Hong Le, Shin-ichi Nishimura, Tatsuro Nishiyama, Chen Fang, & Thai Canh Nguyen. (2021). EVALUATION OF STRESS OF BOX CULVERT FOR AGRICULTURAL DAM. GEOMATE Journal, 20(77), 132–140. Retrieved from https://geomatejournal.com/geomate/article/view/376

Most read articles by the same author(s)