A Zero Bending Moment Suspension Dome Structure and Its Calculation Method

Abstract

The invention discloses a suspension dome structure with zero bending moment equiaxial force and a calculation method thereof. The suspension dome structure includes an upper chord single-layer reticulated shell and a lower chord cable-strut structure, and the lower chord cable-strut structure includes vertical bracing rods. cable and hoop cable, its analysis process includes solving ideal deformation, establishing finite element model, node target load calculation, bracing bar height and steel cable prestress size calculation and other processes, the calculation method of the present invention is to compare the lower string cable rod structure The effect of the single-layer reticulated shell is equivalent to the external load. By making the equivalent external load of the node consistent with the target load of the node under the ideal deformation of the upper chord single-layer reticulated shell under the ideal deformation of zero bending moment equiaxial force, the relationship between the height of the strut and the steel Cable prestress size. Compared with the prior art, the present invention has the beneficial effects of high calculation efficiency, simple process, controllable displacement and internal force of the obtained suspend dome structure, reticulated shell rods suitable for standardized production, good mechanical performance, and structural steel The amount is greatly reduced compared with the traditional method.

Description

technical field [0001] The invention relates to the field of architecture, in particular to a zero-bending-moment equiaxial-force suspending dome structure and a calculation method thereof. Background technique [0002] Suspension domes achieve force balance through the joint work of the upper chord single-layer reticulated shell and the lower chord cable-strut system. There have been many years of theoretical research and engineering practice in China. Since the suspension dome structure is a statically indeterminate structure, there are various equilibrium states under the prestressed load state. The three methods of force-finding and form-finding synergy are analyzed at the same time, but the traditional force-finding and form-finding methods often take achieving the target cable force or controlling the displacement of the support as the solution goal. Therefore, the internal force distribution of the reticulated shell members obtained by the solution is often uneven, a...

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Problems solved by technology

Therefore, the internal force distribution of the reticulated shell members obtained by the solution is often uneven, and the axial force of the dome members often varies greatly under the vertical load and there is a large bending moment. The reduction of the rate of the structure also brings difficulties to the production and processing of the structure. At the same time, the internal force distribution of the suspension dome members and whether the shape of the suspension dome is smooth after deformation are often passively checked, and it is difficult to accurately control the shape of the deformation. It has an adverse effect on the promotion of the suspend dome structure

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