Suspendome structure with zero bending moment and equiaxial force and calculating method thereof

Abstract

The invention discloses a suspendome structure with zero bending moment and equiaxial force and a calculating method thereof. The suspendome structure comprises an upper chord single-layer reticulated shell and a lower chord rod-cable structure, wherein the lower chord rod-cable structure comprises a vertical stay bar, a radial inhaul cable and an annular inhaul cable. The analysis procedure comprises solving ideal deformation, establishing finite element modeling, calculating node target load, calculating the height of the stay bar and the prestressing force of a steel rope and the like. Thecalculating method comprises the following steps: the action of the lower chord rod-cable structure to the upper chord single-layer reticulated shell is equivalent to external load, the equivalent external load of the node and the target load of the node of the upper chord single-layer reticulated shell under ideal deformation of zero bending moment and equiaxial force are enabled to be consistent to solve the height of the stay bar and the prestressing force of the steel rope. Compared with the prior art, the suspendome structure and the calculating method have the following benefits: the calculating efficiency is high, the course is simple, the obtained suspendome structure is controllable in displacement and internal force; a reticulated shell rod piece is suitable for standardized production and is excellent in stress performance; and the steel consumption quantity of the suspendome structure is greatly reduced compared with that of 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...

AI Technical Summary

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

Images