A New Type Of Arch Dam-Research On Stress Analysis And Shape Optimization Of Cvcloid Arch Dam

Arch dam as a water retaining structures, the type of convex single arch damupstream and removal of single curvature arch dam web beam at the end of the tensionzone of concrete hyperbolic arch dam, the dam body is in constantimprovement andoptimization process. Of arch dam type single heart, double hearts, three hearts archyperbolic arch dam, parabolic hyperbolic arch dam, oval-curvature arch dam, thelogarithmic spiral curvature arch dam.Analysis of the body and so has an important impact on the safety, cost andconstruction of the dam. The safety and reliability of arch dam is guaranteed to rely onthe strength and the two sides of the dam concrete abutments rock mass strength andstability. Arch dam body design, on the one hand, the need to give full play to theadvantages of high compressive strength of concrete in order to minimize the tensilestress, the dam is exposed to more uniform compressive stress, the load transfer to thecross-strait dam foundation; on the other hand, attention should be paid to cross-straitskewback stability against sliding and rock mass deformation, so that the thrust of thecross-strait abutment try to turn the mountain. For example, the stress distribution incircular arch dam good, simple body, to facilitate the design, construction, but suitablefor larger central angle is not good enough, the slope angle between the logarithmicspiral arch dam and stress distribution, abutment stability and seismic performance thanother type of dam location, but linear complexity, also difficult to adjust in shape, toimprove the effect of the thrust angle is not obvious. Therefore, we can only trade-offsbetween contradictory to design the optimal state.Existing arch dam linear in the size of the dam body stress and slope stabilitywhether contradiction After a preliminary discussion, this paper proposed a new thearch dams linear-cycloidal arch dam.In order to demonstrate the new linear as the rationality of the arch dam axis, cycloidthe arch dam mathematical model, and combined with structural mechanics mechanicalmodel of the cycloid arch dam, through the initial stress, arch, beam stress distributionandarches, beams Distribution of confirmed the cycloid is likely to be a new type ofarch dam linear, the initial stress calculation results of shape optimization to make itmeet the design specification standards.In order to further confirm the feasibility of the cycloid arch dam, established by the ANSYS three-dimensional solid model of the cycloid arch dam, completed inANSYS stress analysis and structural response of the the cycloidal arch dam under themost adverse load combinations, results show that in the ANSYSthe results of thecalculation results in structural mechanics are approximately equal. And its twocalculations to meet the concrete arch dam design standards. This will furtherdemonstrate the possibility of cycloid arch dam linear and linear cycloid arch dambecome China’s alternative arch provides a wealth of theoretical arguments.