Steel tube tower node mechanical testing method
A technology of node mechanics and test methods, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve problems such as distortion and inability to truly simulate supervisory tests
Active Publication Date: 2014-07-09
POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD
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Problems solved by technology
[0006] The technical problem to be solved in the present invention is to provide a steel pipe tower node test method that conforms to the actual stress state of the nodes in the entire steel pipe tower, and solve the problem that the traditional steel pipe tower node mechanics test cannot truly simulate the actual stress of the supervisor and cause test distortion.
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[0017] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0018] The mechanical test method of steel pipe tower joints, its implementation model and the force direction of joints are as follows: figure 1 As shown, the two ends of the main pipe 1 are provided with a first directional support 4-1 and a second directional support 4-2, the lower end of the main pipe 1 is connected to a spring 3, and the other end of the spring 3 is fixedly installed on the fixed support Above, the spring 3 is arranged coaxially with the main pipe 1; one end of the branch pipe 2 is welded on the main pipe 1, and the other end passes through the third orientation support 4-3. The directional support only allows the displacement of the main pipe 1 and the branch pipe 2 along the pipe axis direction, and constrains the radial displacement. The geometric dimension ratio of the steel pipe tower node model to the actual model is 1:1.
[0019] The conc...
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The invention discloses a steel tube tower node mechanical testing method, and belongs to the field of steel tube tower node mechanical testing. According to the steel tube tower node mechanical testing method, a first orientational supporting frame and a second orientational supporting frame are penetrated by the edges of the two ends of a main tube; the lower end of the main tube is connected with one end of a spring, and the other end of the spring is fixedly arranged; one end of a branch tube is connected with the main tube, and a third orientational supporting frame is penetrated by the other end of the branch tube; loads are applied along the axial direction of the main tube and the axial direction of the branch tube respectively onto the main tube and the branch tube in a grading synchronous manner according to a preset loading ratio; when a preset load is reached, loads on the main tube and the branch tube are increased continuously with equal proportion until the node is destroyed. The steel tube tower node mechanical testing method is capable of solving a problem that in traditional steel tube tower node mechanical testing, testing distortion is caused because that real simulation of axial tension and pressure on the main tube is not realized, and force conditions are different from real force conditions of steel tubes.
Description
technical field [0001] The invention relates to the field of mechanical test of steel pipe tower joints, in particular to an overall axial and radial mechanical test method of steel pipe tower joints. Background technique [0002] In recent years, with the increase of the transmission voltage, the height of the transmission tower has increased, and the load borne by the transmission tower has continued to increase. The connection forms of the steel pipe tower nodes are varied, and the stress situation is complicated. Its mechanical properties, especially the stability of the structural strength, directly affect the Safety of transmission lines. [0003] The steel pipe tower includes several main pipes and branch pipes, and the branch pipes are generally arranged obliquely and welded on the main pipe. In general, when performing mechanical tests on the joints of steel pipe towers, the bottom boundary of the main pipe is usually set as a fixed support, and the other end boun...
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IPC IPC(8): G01N3/08
Inventor 赵怀宇李占岭
Owner POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD