Enclosed loading framework for multidimensional bearing test on large-scale structural member

[0013] Such as figure 1 , 2 As shown in 3, the enclosed frame is composed of a rigid base 1, four uprights 2, a rear cross beam 8, an upper cross beam 7, a load loading plate 5, an oil cylinder, etc. Equipped with multiple hydraulic cylinders in the X, Y, and Z directions as the force applying mechanism. The rigid base 1, the four columns 2, the rear cross beam 8, and the upper cross beam 7, are all welded by steel plates, and then bolted to form a closed frame. The column 2 is bolted to the rigid base 1. The load loading plate 5 is connected with the sample 3 to be tested.

[0014] The rigid base 1 is connected with the four uprights 2 by bolts. In the front view, the two left uprights 2 are connected together by bolts through a vertical connecting beam 9, and the right two uprights 2 in the front view are also connected together by a vertical connecting beam 9 by bolts. The upper beam 7 and the four uprights 2 are connected by bolts. The rear cross beam 8 is connected with the two left and right uprights 2 in the front view by bolts. A rigid base 1, four uprights 2, two upright connecting beams 9, and a rear cross beam 8 are connected together by bolts to form a closed loading frame, which is used as a reaction loading frame for loading the test sample 3. After installing the loading frame, install the Z-direction cylinder 6 with at least four cylinders, depending on the load of the loaded sample in the actual operating conditions. The upper end of the Z-direction cylinder 6 is connected with the upper beam 7 by bolts. The lower end of the Z-direction oil cylinder 6 is connected with the load-loading plate 5 through a ball hinge. In addition to the Z-direction pulling or pressing function of the sample 3 to be tested, it can also realize the function of simulating the moment Mx and the moment My of the sample 3 to be tested. , It also realizes the combined loading function of tensile, compression and torque of the sample 3 to be tested. The x-direction oil cylinder 10 is connected by bolts to the back beam 8 and the load-loading plate 5 to realize the pressing or pulling function of the sample 3 to be tested. If the sample is not subjected to bending moment in the x-direction, the number of oil cylinders can be one. The y-direction cylinder 4 is bolted to the column 2 and the load loading plate 5. The number of cylinders is two, which can realize the function of pushing and pulling the sample 3 under test and the function of simulating the torque Mz of the sample under test 3 or realizing the function of being tested Specimen 3 is loaded by the combined load of push-pull and torque. The sample 3 to be tested is connected to the rigid base 1 and the load loading plate 5 by bolts. Before the loading test, install various test instruments such as strain gauges and strain gauges on the sample 3 to be tested. After the preparation is completed, test according to the actual load condition of the sample 3 to be tested. For example, the sample is subjected to loads in different directions at the same time under a certain working condition, and the hydraulic cylinders in various directions are controlled by the synchronous controller to cooperate with the sample 3 to be tested. Load test.