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Fatigue test device and fatigue test method for equal-thickness pavement structure on basis of MTS

A technology for pavement structure and fatigue testing, which is used in the application of repetitive force/pulsation force to test the strength of materials, etc., which can solve the problem of high test costs (each cost is in the hundreds of thousands to several million, cannot be widely promoted, and the loading period is long. and other problems, to achieve the effect of large variation range of loading parameters, easy popularization and application, and short loading cycle.

Inactive Publication Date: 2015-12-02
SHANDONG JIAOTONG UNIV
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Problems solved by technology

Due to the limitation of the number of accelerated loading equipment, only a few scholars in China use accelerated loading equipment to study the fatigue performance of asphalt pavement, and the general price of imported accelerated loading equipment is about 18 million, which is huge in cost, long in loading period, and high in test costs (per The cost ranges from hundreds of thousands to millions), which cannot be widely promoted

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  • Fatigue test device and fatigue test method for equal-thickness pavement structure on basis of MTS
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  • Fatigue test device and fatigue test method for equal-thickness pavement structure on basis of MTS

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the structure schematic diagram of the equal-thickness pavement structure fatigue test device based on MTS of the present invention is provided, which includes MTS loading device 1, roadbed pavement model 2, MTS action head 7, loading head 8, sensor 14, rubber layer 15 . The shown MTS loading device 1 is composed of two bases 3, two vertical beams 4, a cross beam 5 and a drive rod 6. The two bases 3 shown are fixed on the foundation, the vertical beam 4 is fixed on the base 3, and the cross beam 5 It is fixed on the top of the two vertical beams 4 , and the driving rod 6 is arranged on the cross beam 5 . The MTS working head 7 is fixed on the top of the driving rod 6 , and under the driving action of the driving rod 6 , the MTS working head 7 can move up and down to load the roadbed and pavement model 2 .

[0027] Th...

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Abstract

The invention provides a fatigue test device for an equal-thickness pavement structure on the basis of MTS. The fatigue test device comprises a subgrade and pavement model and an MTS loading device, and is characterized in that a loading head is fixed at the lower end of an MTS acting head; the lower surface of the loading head is arc-shaped; a rubber layer which is consistent to a tire of an automobile is fixed on the loading head; the MTS acting head applies an acting force with corresponding frequency and load to the subgrade and pavement model; and a sensor is arranged in the subgrade and pavement model. A fatigue test method comprises the following steps of (a) constructing the subgrade and pavement model; (b) hoisting a model case; (c) mounting the MTS acting head; (d) connecting the loading head; (e) setting a loading model; (f) acquiring data; (g) stopping loading; (h) continuing testing; and (i) analyzing data. Compared with special accelerating and loading equipment, the fatigue testing device and the fatigue testing method have the advantages of low cost, short loading period, reasonable test data and low test cost, have obvious beneficial effects, and are convenient to popularize and use.

Description

technical field [0001] The present invention relates to a fatigue test device and method for equal-thickness pavement structure, more specifically, it relates to a method of constructing a subgrade pavement model in a model box and measuring the output data of sensors by applying a force of a certain frequency and load to it An MTS-based equal-thickness pavement structure fatigue test device and method for realizing experimental analysis. Background technique [0002] The experimental research methods of the fatigue failure mechanism of asphalt pavement can be divided into two categories: indoor test and accelerated loading test. There are many methods for indoor small-scale fatigue test of asphalt mixture, mainly bending fatigue test, direct tensile fatigue test, indirect tensile fatigue test and so on. The test method of indoor specimens mainly studies the fatigue characteristics of asphalt mixture specimens, which is separated from the actual stress state of the road sur...

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Application Information

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IPC IPC(8): G01N3/32
Inventor 李晋胡朋陈杰韩涛张小宁焦玉传王克辉徐良军孙杰
Owner SHANDONG JIAOTONG UNIV
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