Morphogenesis Research For Branching Skeleton Structures Of Wall

Branching skeleton structures of wall is that branching structures become the skeleton of wall, which not only can bear the load from roof and floor, besides the dead load of wall space, but also can decorate wall space to achieve the innovative structures which can satisfy the demand of artistic vision. The wall is one of epidermal structures, which form is often single. Because of beautiful configurations and reasonable mechanical behaviors, many branching structures are also applied to the major structure of building, But few to the wall. Therefore this paper research that branching structure are applied to the wall so that achieve the force-beauty’s perfect combination. Which can provide a new way for epidermal structures’ progress. The main research contents are as follows:Sep up a morphogenesis method of the plane branching skeleton structures of wall. First, program composition by LS’s generation method of fractal theory to achieve the different branching fractal diagrams through changing input parameters; with a view to the phenomenon of two layers’ cross don’t appear between of member bars of the plane branching skeleton structures, handle appropriately the superposition and intersecting lines in the branching fractal diagrams; in order to apply the branching fractal diagrams to walls, according to the constraint condition of building to amend their outside shape, thereby complete the topological relation of branching skeleton structures of wall. Second, for achieve the load transfer from wall space to branching skeleton structures of wall during finite element analysis, program composition by the Lawson arithmetic of the Delaunay triangle subdivision to achieve the triangle subdivision of every plane; with a view to keep the shape of branching skeleton structures of wall during the Delaunay triangle subdivision of walls, add two dimension limit condition to composition. From the relationship of the structure’s strain energy and stiffness, the strain energy regards as objective function to deduce the formula of the sensitiveness of the joints’ strain energy; according to the sensitiveness of the joints’ strain energy, adjust the joints of branching skeleton structures of wall step by step, thereby they have beautiful configurations, the same time, have the further reasonable mechanical behaviors, complete the morphogenesis of branching skeleton structures of wall. At last, base on the result of the morphogenesis of branching skeleton structures of wall, according to the condition of the member strength、stability and slender proportion, optimize their sections, thereby to achieve the efficient use of material.Through analysing specific example, know about the characteristic and applicability of the morphogenesis method of the plane branching skeleton structures of wall. During optimize the shape, the displacement of the wall and the bending moment and shearing force of branching skeleton structures of wall are decreasing with the strain energy of the wall decreasing, but their axial force don’t change. After shape optimization, branching skeleton structures of wall attain the strained condition of axial force giving first place, which proves that the topological relation confirmed by fractal theory is reasonable; optimal section design makes the structure stress become uniformity. Achieve the different branching fractal diagrams through changing input parameters, then achieve the initial monolayer branching skeleton structures of wall after handling the branching fractal diagrams suitably, and through the operation of reproduction and translation, can achieve several backbone 、 monolayer and multilayer structure. This paper prove that the method is feasible 、 reasonable 、efficient 、 economic and universality through same examples. At last, give same practical examples to prove the significance and value of the research.