Method for constructing viscoelasticity prediction model for fiber asphalt concrete

A technology of asphalt concrete and prediction model, which is applied in prediction, special data processing applications, instruments, etc., and can solve the problems of complex parameter solving process and many parameters, etc.

Inactive Publication Date: 2017-12-15
NANTONG UNIVERSITY
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Problems solved by technology

Although the four-parameter model, the generalized Kelvin model and the generalized Maxwell viscoelastic model can well characterize the mechanical properties of asphalt mixture, they have many parameters and the process of solving them is complicated.

Method used

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  • Method for constructing viscoelasticity prediction model for fiber asphalt concrete
  • Method for constructing viscoelasticity prediction model for fiber asphalt concrete
  • Method for constructing viscoelasticity prediction model for fiber asphalt concrete

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Embodiment Construction

[0088] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0089] A method for constructing a viscoelastic prediction model of fiber asphalt concrete, through the construction of FRA material model, the derivation of FRA relaxation model and creep compliance, the response analysis of rutting test, the determination of SMA-13 ​​viscoelastic characteristic parameters and the effective value of the model The verification steps are carried out to complete the construction of the viscoelasticity prediction model of fiber asphalt concrete; the specific steps are as follows:

[0090] (1) Construction of FRA material model:

[0091] A. Construction of the three-parameter fixed model: The three-parameter fixed model consists of a spring unit and a Kelvin model connected in series, s...

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Abstract

The invention discloses a method for constructing a viscoelasticity prediction model for fiber asphalt concrete. The method comprises the steps of: the construction of the FRA material model, the derivation of the FRA relaxation model and the creep compliance, the analysis of the wheel tracking test, the determination of the SMA-13 viscoelastic characteristic parameter and the verification of the valid values of the model. The method of the invention has the advantages of using the FRA viscoelastic behavior model, which better presents the viscoelastic characteristics of the fiber asphalt concrete, and is effective to improve the practicality of the mesoscopic numerical model for the fiber asphalt concrete.

Description

technical field [0001] The invention relates to a method for constructing a predictive model, in particular to a method for constructing a viscoelasticity predictive model of fiber asphalt concrete. Background technique [0002] The creep resistance and relaxation resistance of asphalt concrete can be improved after adding fibers, but the mechanical properties of the material still show the characteristics of viscoelasticity. The mechanical properties of fiber reinforced asphalt concrete (FRA) are not only determined by the asphalt matrix material In addition to the material properties of fiber materials, it is also related to geometric characteristics such as fiber volume fraction, aspect ratio, and fiber arrangement. [0003] Asphalt concrete has typical steady-state creep characteristics, and the mechanical properties of the material are mainly characterized by viscoelastic behavior. Common viscoelastic models of asphalt concrete include: three-parameter solid model, thr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06F17/50
CPCG06F30/20G06F2119/06G06Q10/04
Inventor 徐勋倩陈建平徐勋伟仇云强张振沙海洋王琦郭鑫峰李朋昊
Owner NANTONG UNIVERSITY
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