A reticulated shell structure with free-form surface composed of two limb plate composite components
A technology of combining components and plates, which is applied in the field of steel structures, can solve problems such as weak stability, and achieve the effects of beautiful shape, reasonableness, and convenient construction
Active Publication Date: 2021-02-09
ZHEJIANG UNIV
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Problems solved by technology
The present invention constructs a double-limb plate combination member (hereinafter referred to as a double-limb plate), which effectively improves the defect of weak out-of-plane stability of the member itself; proposes an optimization algorithm for member layout, and improves the aesthetics and mechanical properties of the structural configuration. rationality
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[0035] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly. The specific implementation process of the free-form surface reticulated shell structure composed of double limb plate composite members is as follows:
[0036] (1) Mesh 2 is divided on the target free-form surface 1 of the calculation example (such as figure 1 shown).
[0037] (2) Translate the grid 2 along the vertical direction, and connect the corresponding grid vertices, as the node axis 3 of the reticulated shell (such as figure 2 shown).
[0038] (3) Establish the following optimization model:
[0039]
[0040]
[0041] Among them, the design variables are:
[0042] X=[x 11 x 21 x 31 … x 1i x 2i x 3i … x 1n x 2n x ...
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The invention discloses a free-form surface reticulated shell structure formed by dual-limb sheet bar composite members. The reticulated shell structure uses dual-limb sheet bars as the main stress members; and through optimization after structural configuration, different members at one joint intersect on the same joint axis, the joint axis is in the surface normal direction, a mold of a free-form surface is formed by arc-shaped outlines of the corresponding members in a fitting manner, and the assembly type single-layer reticulated shell structure is formed. Each dual-limb sheet bar composite member is formed by two arc-shaped metal branch-limb sheets and a plurality of base plates, and the arc-shaped metal branch-limb sheets and the base plates are overlapped and then are connected through bolts in a penetration manner. According to the free-form surface reticulated shell structure formed by dual-limb sheet bar composite members, the lateral bending resistance rigidity is effectively improved while the advantages of one single sheet bar about machining, transportation and construction are kept; and with the reticulated shell structure, a curved-surface mold with high degree of freedom can be implemented, the appearance is attractive, the structure is reasonable, the strength is high so that stability is achieved, and the applicability is high.
Description
technical field [0001] The invention relates to a new space reticulated shell in a building structure, in particular to a reticulated shell structure with a free-form surface formed by combining components with two limb plates, and belongs to the field of steel structures. Background technique [0002] In recent years, free-form reticulated shell structures have been widely used in engineering practice. In space steel reticulated shells, almost all section steels are used as structural components, such as I-beams, round steel pipes, etc. The processing technology of section steel limits its application in free-form surface modeling buildings: it is necessary to discretize free and continuous surfaces into polyhedral shapes, and use straight-line section steel components for fitting, but there is always a certain deviation from the target surface; or for straight-line section steel The arc bending process is added to the component, but the arc bending process increases addit...
Claims
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IPC IPC(8): E04B1/32
CPCE04B1/32E04B2001/327
Inventor 罗尧治葛荟斌万华平魏越
Owner ZHEJIANG UNIV