Load positioning device for structural test

Abstract

The invention discloses a load positioning device for a structural test. The device consists of a positioning block, a bottom plate, retaining blocks, an anti-overturn screw, adjusting screws and locknuts. The device is connected and fixed with a steel member or a steel embedded piece of a concrete member through the bottom plate; the positioning block is connected with a jack, is arranged in an area enclosed by the retaining blocks of the surface of the bottom plate, and moves longitudinally and transversely by screwing the adjusting screws; the anti-overturn screw passes through slots on the transverse retaining blocks, and then is anchored into a threaded hole which is formed on the side surfaces of the positioning block so as to prevent the positioning block from being separated from the bottom plate, so that the positioning device is applicable to vertical loading working conditions, and can also be applied to horizontal loading working conditions; scale marks are marked on the upper surface of the bottom plate, and are used for improving the adjusting speed and the adjusting accuracy; and the quantity of the longitudinal adjusting screws is increased and decreased according to the displacement adjustment range. The whole device has a clear principle, can be simply manufactured, is convenient to use, is high in load positioning accuracy, and can be applied to civil engineering teaching and scientific research tests.

Description

technical field [0001] The invention relates to a teaching and scientific research test device for the specialty of civil engineering, in particular to a structure test load positioning device. Background technique [0002] In the field of structural testing in civil engineering, specimen compression is a common loading condition. The most common method is the axial compression loading method. In addition, depending on the purpose of the test, there may also be eccentric compression loading requirements. Load positioning accuracy is often an important factor affecting the accuracy of test results. Taking axial compression loading as an example, generally through the prior design of the position of the connecting parts (such as bolts), the center of the jack base (such as ball hinges, knife-edge hinges, etc.) coincides with the centroid of the loading end of the specimen, so as to realize the one-time theory. Alignment. However, due to the processing error in the size of t...

AI Technical Summary

Problems solved by technology

Although the device can adjust the load position, it cannot accurately grasp the adjusted displacement, and its scope of application is limited to a single working condition of vertical centered loading, and cannot be used in horizontal loading tests, let alone meet the requirements of large eccentric loading.

In addition, the adjusting jackscrew of the device is located inside the device, which requires high adjustment tools and causes some inconvenience to the actual operation

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