A Construction Method of Irregular Grid Structure Determined by the Longitudinal Symmetry Plane of the Bar

Abstract

The invention discloses an irregular grid structure construction method determined by the longitudinal symmetry surface of each rod member. A graph is used for representing the topological connectionrelationship of an irregular grid structure, each edge in the graph corresponds to one rod member, each node corresponds to the connection point between the every two rod members, and the longitudinalsymmetry surfaces of the connected rod members intersect in the node axis direction; and parameters of the rod members and the nodes of the irregular grid structure are set, the node axis direction is calculated according to coplanar constraint conditions, and the longitudinal symmetry surface of each rod member is determined according to the corresponding node axis direction, and according to the longitudinal symmetry surface of each rod member and each node axis direction, pre-processing and mounting of rod member are conducted to realize the construction of an irregular grid. By means of the construct irregular grid structure construction method, the geometric complexity of the intersection of the rod members is simplified, a geometric reference line is provided for the assembly of thenodes through the clear node axis directions, and construction is facilitated; and the node axis directions of the two ends of each rod member are in one plane with the axis of the corresponding rodmember, and the generation of torque along the axis within each rod member is avoided accordingly.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, in particular to a method for constructing an irregular grid structure determined by a longitudinal symmetry plane of a rod. Background technique [0002] Irregular grid structures often appear in contemporary architectural projects, such as the National Aquatics Center (Water Cube). Irregular grid structures are generally made of steel, but wooden poles can also be used (such as the roof garden of Crossrail place in London). Triangles, quadrilaterals, or irregular polygons can be formed between the rods. Typically 3 to 4 rods can be connected at each node. The rod mainly bears the axial force, and a small amount of bending moment and shear force. [0003] The technical difficulty of the irregular grid structure lies in the connection structure at the nodes, that is, how to connect multiple members together at irregular angles. Metal mesh structures generally use bolted ball ...

AI Technical Summary

Problems solved by technology

Wooden grid structures are generally fixed with metal connectors and bolts. If the shapes of wooden rods and metal connectors are irregular, it will increase the difficulty of processing and assembly.

[0004] In 2015, the article "Architectural geometry" by Helmut Pottmann et al. summarized the key technical issues in the irregular grid structure, and pointed out how the longitudinal symmetry planes of the members intersect at the nodes, but it did not clearly propose that one-step concrete plan for implementation

In the current field of construction engineering, the treatment method of the longitudinal symmetry plane of the rod in the irregular grid structure is not clear, which brings difficulties to the design and construction

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