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Mathematical Problems in Engineering
Volume 2015, Article ID 721602, 12 pages
http://dx.doi.org/10.1155/2015/721602
Research Article

Mechanism Research of Arch Dam Abutment Forces during Overload

1College of Civil and Architecture Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China
2College of Materials Science and Engineering, Guangxi University, Nanning 530004, China
3College of Civil and Architecture Engineering, Guangxi University, Nanning 530004, China

Received 5 September 2014; Revised 8 February 2015; Accepted 18 February 2015

Academic Editor: Paolo Lonetti

Copyright © 2015 Yu Xia et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents research on the abutment forces of a double-curvature arch dam during overload based on numerical calculation results obtained through finite element method by Ansys. Results show that, with an increase in elevation, the abutment forces and bending moment of the arch dam increase first and then decrease from the bottom to the top of the dam. Abutment forces and bending moment reach their maximum at the middle or middle-down portion of the dam. The distributions of abutment forces and moment do not change during overload. The magnitude of each arch layer’s forces and moment increases linearly during overload. This result indicates that each arch layer transmits bearing loads to the rocks of the left and right banks steadily. This research explains the operating mechanism of an arch dam under normal and overload conditions. It provides a simple method to calculate the distribution of forces and and a new method to calculate the overload factor of an arch dam through the estimation of arch layers based on the redistribution characteristic of arch abutment forces.