Multidirectional error-adjustable node suitable for suspend-dome space structure

Abstract

The invention discloses a multidirectional error-adjustable node suitable for a suspend-dome space structure. The node comprises a bracket, adjusting pieces, vertical spacing bolts and other devices and fittings, wherein the adjusting pieces are fixed on the bracket through the vertical spacing bolts to from a node entirety; and error adjustment is realized through the adjusting pieces. The invention has the advantages as follows: three-dimensional multidirectional adjustment of the node and a lattice shell rod piece connected with the node can be carried out in the horizontal direction, the vertical direction and the axis direction of the rod piece, so that the length of the rod piece and the spatial geometric position of the node can be adjusted; and through the adoption of the node, construction errors and structural defects are reduced, the stable bearing capacity of a structure is effectively improved, and the safe use of the structure is ensured.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a device, an accessory and an installation and adjustment method suitable for adjusting the length of a rod and the position of a node in a space structure of a suspend dome. Background technique [0002] Suspension dome structure is a new type of prestressed space structure system widely used in large-span and large-space structures. In recent years, it has been widely used in public buildings such as gymnasiums, exhibition halls, theaters, auditoriums, waiting halls, etc., such as: the roof of the lobby of the business center in Tianjin Free Trade Zone, Changzhou Stadium, 2008 Beijing Olympic Badminton Stadium, Jinan Olympic Sports Center Gymnasium It has become one of the most modern and potential green load-bearing structural systems in the 21st century. [0003] In terms of structural composition, the space structure of the suspend dome consists of an upper steel grid structu...

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Problems solved by technology

[0005] However, the joints commonly used in the existing suspen-dome space structure have the following problems: in the installation and construction process of the structure, once the components and the joints are connected, the installation length of the rods and the position of the joints are completely determined, and no further make any error adjustments

However, since the nodes of the steel grid structure on the upper part of the suspendome are composed of multiple rods, in the actual installation process of the steel grid structure, the blanking length of each rod is inevitably compared with the actual installation length There are initial defects, and the manufacturing defects of all the rods will accumulate to the nodes. In addition, the installation errors of the construction personnel and the deformation of the rods caused by repeated temperature changes during the installation period make it inevitable that there will be certain defects in the suspendome structure during the construction process. The cumulative installation error of

In this case, the site either temporarily changes the blanking length of some rods for re-manufacturing, or uses manual or mechanical force to place some rods and nodes in place, which will cause the structure to have a certain initial assembly internal force and unexpected At the same time, it is difficult to ensure that the initial shape of the structure is consistent with the design requirements

Especially after the prestressed tensioning of the lower cables is completed, the errors of the displacement state and stress state of the structure will be further increased, which will have a very adverse impact on the safety performance of the structure in the subsequent use stage.

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