Device and method for multi-directionally loading universal K-shaped nodes

Abstract

The invention relates to a device and method for multi-directionally loading universal K-shaped nodes. The device comprises a counterforce frame, and a main material pull and pressure loading device and an auxiliary material pull and pressure loading device which are arranged in the counterforce frame, wherein the main material pull and pressure loading device comprises a tensioning jack and a movable pressure bearing box and a counterforce device which are detachably connected in the counterforce frame, one end of a main material of the K-shaped node and the counterforce frame are fixedly arranged, and the other end is a loading end; the auxiliary material pull and pressure loading device comprises a pressure jack and a pull jack which are fixedly arranged in the counterforce frame, the pressure jack is coaxially arranged with an auxiliary material of the corresponding K-shaped node for pressure loading, and a pull rod in a piston of the pull jack is coaxially fixed with the auxiliarymaterial of the corresponding K-shaped node for pull loading. The connection angle between pipes is adjusted on the basis of the pressure multi-directional loading device and the pull multi-directional loading device of the main material and the auxiliary material to realize the multi-angle force test of the node, and the tension and pressure are applied to the outside of the plane of the pipe node by a hydraulic jack.

Description

technical field [0001] The invention relates to the scope of a strength test adapter, in particular to a universal K-shaped node multi-directional loading device and method. Background technique [0002] With the development of my country's electric power industry, the voltage level continues to increase, which puts forward higher requirements for the structural design and steel strength of transmission towers. Compared with traditional angle steel members, steel pipe members have the characteristics of small wind pressure, high rigidity, simple structure, and clear force transmission, which can give full play to the load-bearing performance of materials, and are suitable for use in iron towers with large loads, and have significant comprehensive economic benefits and social benefits. [0003] Steel pipe tube-sheet joints and intersecting joints are commonly used joint types of steel pipe transmission towers. The mechanical properties of the joints, especially the stability...

AI Technical Summary

Problems solved by technology

However, the current research on the mechanical performance of tube-sheet joints is not deep enough, domestic and foreign codes have not made detailed regulations on the ultimate bearing capacity of such joints, and there is a lack of corresponding calculation and analysis methods that can be used in actual engineering design. The most reliable way to check the bearing capacity performance of joints

[0004] In order to observe the failure mechanism and failure form of K-type joints, find out the stress characteristics of the joints, and provide a certain basis for the design of K-type joints, the existing test equipment has a single The test cannot meet the general requirements, and cannot meet the various requirements of the mechanical performance test of this type of node. To test each situation one by one, not only the workload is large, the test cost is high, but the test efficiency is low, which is not conducive to the smooth test conduct

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