A long-term loading system and method for a test beam

Abstract

The invention discloses a test beam long-term loading system and method. The loading system comprises a lever, a tension bar, a distributive beam, a counterweight device, a hydraulic pressure weight adjusting device, a ground anchor and a force transmission and testing device; the design of a loading system is carried out using the lever principle, firstly based on the test requirements, the size of the applied load as required is set; after the determination of the size of the load, the length ratio of the short arm and the long arm of the lever is designed from the size of the test site, the size of the loading lever and other aspects, under the precondition that the weight of the lever is not taken into consideration; in theory, the larger is the length ratio of the short arm and the long arm of the lever, the larger is the weight applied to the force bearing point of the long arm, and the larger is the amplifying multiple of the load at the force bearing point of the lever, and the aim of applying relatively large load is further achieved by utilizing relatively small weight. The long-term loading system is easy to operate, the loading and unloading save time and labor, the performance is stable, and long-term testing is guaranteed. The long-term loading system in the later period does not require special maintenance, and basically is not affected by external conditions.

Description

technical field [0001] The invention relates to the field of bridge structure test loading, in particular to a long-term loading system and method for test beams. Background technique [0002] In the basic technology research and engineering application research of bridge structures, in order to obtain the characteristics of the mechanical indicators of certain structures or components, the real bridge structural components are often used as prototypes, and the model is made according to the similarity theory as the research object, and then the mechanical performance test is carried out. Simulate the response of structural members under loading and stress. Therefore, choosing the appropriate loading method and loading equipment is the key to ensure the smooth progress of the whole test work. [0003] General structural laboratories are equipped with pressure testing machines and reaction frames with a certain load tonnage, which are applied to short-term mechanical perform...

AI Technical Summary

Problems solved by technology

For components with a large model size, the mechanical response needs to meet the test requirements. Generally, a large load needs to be applied to achieve the goal of the research. If surcharge loading is used, a large number of high-density loading blocks are required, and the cost is high. , inconvenient to add and unload

If a small jack is used to load the ground anchor and the reaction frame, it is difficult to meet the requirements of the loading level

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