The present method is applied to stress analysis for a typical cylindrical arch dam, and the calculated results of the arch stress and hoop stress conform to those obtained by the trial load method. Therefore, the calculated results of the arch dam stress by the present method can be used for safety assessment of arch dams according to the national arch dam design code.

The equation for calculation is established based on the assumptions that the stress is linearly distributed in the arch-beam direction, the equivalent stress on the upstream and downstream surfaces are unknown variable and the constraint internal force in the cross section of arch or beam is given. The formulas for calculating other stress components at the upstream and downstream surface of the dam are deduced when boundary conditions are given.

The numerical results of these two models are consistent with each other in terms of the following aspects: crest displacements and joints opening, frequency components of the dam structures, stress envelopment in arch and cantilever direction and the tendencies of stress redistribution caused by the joints opening.

The non-local elastic solutions yield a finite hoop stress at crack tips, thus allowing us to use the maximum stress as a fracture criterion.

A detailed inspection of stress distributions in the C/C rings revealed that a rotational imbalance inherent in C/Cs caused a high average hoop stress and stress concentration around the inner radius.

Based upon the above results, we analyse the hoop stress along the hyperbolic curve and the stress distributions on the planex2=0 for aluminium (cubic crystal).

The finite hoop stress at the crack tip depends on the crack length.

The non-local dynamic elastic solutions yield a finite hoop stress at the crack tip, thus allowing for a fracture criterion based on the maximum dynamic stress hypothesis.

This is a preliminary study of the effect of vertical curvature on the cantilever and arch stresses in a double-curvature arch dam. A modification of the conventional method of crown cantilever is proposed with the consideration of the adjustment of vertical displacements, in additon to the radial displacements at the crown of arches. Results of the study indicate that, if the vertical curvature is properly chosen, tensional stresses in the crown cantilever of the dam can be reduced to a certain extent. Experimental...

This is a preliminary study of the effect of vertical curvature on the cantilever and arch stresses in a double-curvature arch dam. A modification of the conventional method of crown cantilever is proposed with the consideration of the adjustment of vertical displacements, in additon to the radial displacements at the crown of arches. Results of the study indicate that, if the vertical curvature is properly chosen, tensional stresses in the crown cantilever of the dam can be reduced to a certain extent. Experimental study had been made with the aid of gelatin models. Analysis of the results showed that, except in the vicinity of the top of the dam, the general trend of the distribution of arch and cantilever stresses agreed with that of computation within reasonable limits.

The Xiaowan Arch Dam is the highest proposal arch dam in the world. The opening of transverse joint because of strong earthquake action is unfavorable to the safety of sealing and dam body. Whether the transverse joint reinforcement is adopted or not is an urgent subject to be solved in theory for the designer. For this reason, the non linear analysis model of dam with transverse joint reinforcement is applied to the analysis of earthquake response of the Xiaowan Arch dam with transverse joint reinforcement....

The Xiaowan Arch Dam is the highest proposal arch dam in the world. The opening of transverse joint because of strong earthquake action is unfavorable to the safety of sealing and dam body. Whether the transverse joint reinforcement is adopted or not is an urgent subject to be solved in theory for the designer. For this reason, the non linear analysis model of dam with transverse joint reinforcement is applied to the analysis of earthquake response of the Xiaowan Arch dam with transverse joint reinforcement. The calculation results showed the transverse joint reinforcement can obviously control the opening of the transverse joints of arch dam, increase the integrity of arch dam and reduce the worsening of beam stresses caused by the opening of transverse joint to a certain degree. It is necessary to arrange proper vertical steel bars in order to avoid the cracks along beam direction.

To estimate the resistant effect of reinforcing steel across contraction joints on the aseismic responses of high arch dams, a nonlinear numerical analysis of contraction joint elements with reinforcements was developed to study the control of contraction joint openings to optimize the strength and flexibility. The Big Tujunga Dam was analyzed to verify the rationality of the model. The results demonstrate that with proper reinforcements, the joint opening can be controlled to some extent and the stresses can...

To estimate the resistant effect of reinforcing steel across contraction joints on the aseismic responses of high arch dams, a nonlinear numerical analysis of contraction joint elements with reinforcements was developed to study the control of contraction joint openings to optimize the strength and flexibility. The Big Tujunga Dam was analyzed to verify the rationality of the model. The results demonstrate that with proper reinforcements, the joint opening can be controlled to some extent and the stresses can be redistributed between the arch and the cantilever components, which will enhance the aseismic safety of arch dams.