Frequency conversion horizontal cyclic loading test device

Abstract

The invention relates to a frequency-conversion horizontal cyclic loading test device and aims at providing the frequency-conversion horizontal cyclic loading test device which is simple in structure, low in cost, large in loading frequency and various in loading manner. According to the technical scheme, the frequency-conversion horizontal cyclic loading test device is provided with a model pile arranged in a water trough. The frequency-conversion horizontal cyclic loading test device is characterized in that a plurality of loading mechanism sets are connected to the model pile; each loading mechanism set is composed of a gravity loading mechanism and a moment loading mechanism, wherein the gravity loading mechanism and the moment loading mechanism are symmetrically connected to the two sides of the model pile; and each gravity loading mechanism is provided with a weight block I and a steel wire rope I, wherein one end of the steel wire rope I is connected to the model pile, the other end of the steel wire rope I is connected with the weight block I, the steel wire rope I is hung on a pulley I, and the pulley I is fixed to the ground through a connecting rod I and a rigid loading frame. The frequency-conversion horizontal cyclic loading test device is suitable for conducting long-period horizontal cyclic researches on an offshore single pile indoor model test.

Description

technical field [0001] The invention relates to a frequency-variable horizontal cyclic loading test device. It is suitable for long-term horizontal circulation research of offshore single pile indoor model test. Background technique [0002] At present, pile foundations or other foundation forms are more and more widely used in marine engineering. However, due to the extremely complex offshore environment, they are often subjected to wind and wave loads of different frequencies, and the action period is long, and the number of load actions is often up to 10. 7 Second, it affects the research on the horizontal load performance of indoor single piles. Therefore, in the past, when conducting long-period horizontal cycle research on indoor model tests of offshore single piles, external loads of different frequencies were usually simplified into one load and applied to the model pile, and expensive vibrators or MTS hydraulic loading systems were often used for loading. , and ha...

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Problems solved by technology

[0003] 1. The cost of loading equipment is expensive, and the cost of a single equipment ranges from tens of thousands to millions of yuan, and the cost of testing is high

2. The number of loading times is limited. When the number of loading times reaches hundreds of thousands, the loading system is prone to problems

3. It is difficult to meet the requirements of personalized tests

However, the load required in the model test is often only a load of tens of N to hundreds of N, and the loading accuracy is difficult to meet the requirements of the small model test.

4. Limited by the volume of the exciter or the MTS hydraulic loading system and the test site, only a single point of loading is often used in the test, which limits the research content of the test

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