Single-layer latticed shell structure node semi-rigid measuring method

Abstract

The invention discloses a single-layer latticed shell structure node semi-rigid measuring method. The method comprises the steps that: a node to be measured is assembled with a rod member according to a preset connection angle, the tail end of the rod member is fixed on a fixing device, a loading device applies a pressure above the node, a stress measuring instrument measures the stress connection of the rod member, and the bending moment at the node is calculated; a displacement collection device measures the vertical displacement values at a plurality of positions of the rod member, and the rotation angle at the connection part of the node is calculated; and the node bending moment and the rotation angle obtained in each step of the loading process are drawn into a bending moment-rotation angle curve, and the semi-rigid characteristics of the node are reflected by the curve. According to the invention, the node semi-rigid characteristics reflected by the bending moment-rotation angle curve can be directly used in the design calculation of a semi-rigid node single-layer latticed shell structure, the influences of the node semi-rigid performance on the integral stability of the single-layer latticed shell structure are really and effectively reflected, and the shortages of the part of content in the existing standard are supplemented and improved.

Description

technical field [0001] The invention relates to a method for measuring the semi-rigidity of a node of a single-layer reticulated shell structure, more specifically, relates to a method that can truly reflect the stress characteristics of a single-layer reticulated shell node and accurately measure the bending moment-rotation angle relationship of the node under load. And use it to reflect the semi-rigid characteristics of nodes. Background technique [0002] The semi-rigidity of the node refers to the characteristics of the angular displacement of the node under the action of resisting the bending moment. Figure 4 shown) to reflect its semi-rigid characteristics. [0003] Many studies have shown that the semi-rigidity of the joints will have a great impact on the overall mechanical performance of the structure. In the steel frame structure, the semi-rigidity of the end plate joints will have a great impact on the static bearing capacity, seismic performance and progressive...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome many defects such as the inability of the existing semi-rigid measurement method to accurately consider the influence of the node axial force and the inaccurate data processing method, the present invention provides a new measurement method, which can effectively and accurately consider the single-layer reticulated shell The coupling effect of bending moment and axial force at the nodes in the structure, and a reasonable data acquisition method is used to accurately measure the semi-rigid characteristics of the nodes under real stress conditions

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