# Nonlinear Trial Load Method of Arch Dams

by Kaizhi Wang, Wuhan Univ of Hydraulic &, Electric Engineering, Wuhan, China,
Junxing Wang, Wuhan Univ of Hydraulic &, Electric Engineering, Wuhan, China,
Xinmin Li, Wuhan Univ of Hydraulic &, Electric Engineering, Wuhan, China,
Jinxing Fan, Wuhan Univ of Hydraulic &, Electric Engineering, Wuhan, China,
Xueling Su, Wuhan Univ of Hydraulic &, Electric Engineering, Wuhan, China,

Document Type: Proceeding Paper

Part of: Computing in Civil and Building Engineering

Abstract:

The trial load method is still an important method for the stress analysis of arch dams at present. However, the trial load method can be used only for the linear elastic analysis of arch dams, the result from this method is only an approximate solution of the actual ones. The constitutive relation of arch dam's material is nonlinear, hence it is necessary to discuss nonlinear trial load method of arch dams. In addition, quite a few arch dams with peripheral joint have been constructed around the world, for the relative displacements between arch dam's body and boundary bearer, the stress analysis of arch dams with peripheral joint is nonlinear too, so that, the trial load method of arch dams with peripheral joint is needed to make further study. This paper presents a nonlinear trial load method which can be used to calculate the limit of bearing capacity (including overload factor and strength reserve coefficient) and trace the procedure of collapse for conventional arch dams or arch dams with peripheral joint. According to the mathematic-mechanic model presented in this paper, the program was developed which has been used for the analysis of Lijia Gorge arch dam and Baiyun River arch dam with peripheral joint, the results are reasonable.

Subject Headings: Arch dams | Nonlinear analysis | Load factors | Stress analysis | Joints | Load bearing capacity | Structural analysis | Overloads