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Method for determining cement pavement calking deformation indexes based on statics analysis

A static analysis, cement pavement technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as road performance that does not involve caulking materials

Inactive Publication Date: 2017-01-25
NANJING FORESTRY UNIV
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Problems solved by technology

At present, although our country has also put forward the design specifications for cement concrete pavement of highways, the evaluation index of road performance of caulking materials is not involved in the evaluation system.

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  • Method for determining cement pavement calking deformation indexes based on statics analysis

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Embodiment Construction

[0016] The object of the present invention is to provide a method for determining the deformation index of cement pavement jointing material based on static analysis. The specific implementation steps are as follows:

[0017] (1) Determine the material properties and geometric size requirements of the cement pavement according to the relevant regulations in the current "Code for Design of Highway Cement Concrete Pavement (JTG D40-2011)", and establish the initial finite element model of the cement pavement structure with joints and joints ;

[0018] (2) Determine the boundary constraints of the finite element model, select 8-node two-dimensional plane strain reduced integral solid elements for mesh division, and refine the joint caulking material and the surrounding mesh in order to simulate the caulking material with mesh technology The law of mechanical response under static load, analyze its force state;

[0019] (3) Set the size of the load acting on the pavement structure and t...

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Abstract

The invention discloses a method for determining cement pavement calking deformation indexes based on statics analysis, belongs to the technical field of road engineering cement pavement calking, and solves the durability problems of tensile cracking, falling, water seepage, extrusion and the like caused by difficulty of current calking in adapting to the horizontal width and vertical relative displacement variation of a cement pavement joint. The method includes the steps: firstly, building a cement pavement structure finite element model containing the calking, analyzing the mechanics response law of the calking under different static load conditions, and analyzing horizontal and vertical maximum displacement, shearing strain and stress, tensile strain and stress and compressive strain and stress of the cement pavement calking; respectively comparing the horizontal and vertical maximum displacement, shearing strain, tensile strain and compressive strain of the calking, taking maximum relative deformation results of the calking as control deformation indexes, and proposing maximum admissible values as a cement pavement calking design basis. According to the method, durability of the calking can be enhanced, and the service performance of a cement pavement is improved.

Description

Technical field [0001] The invention is a method for determining the deformation index of cement pavement caulking materials based on static mechanics analysis, and belongs to the technical field of cement pavement caulking in road engineering. Background technique [0002] In recent years, with the rapid development of my country's highways and the continuous improvement of the national economy, cement pavement, as a main form of pavement structure, has been widely used in China. As we all know, cement pavement has become one of the main paving forms in advanced pavement because of its advantages such as large bearing capacity, good stability, long service life and high strength. However, although cement pavement has many advantages, it also has fatal disadvantages. In order to adapt to the deformation needs of the cement pavement, eliminate the temperature internal stress and temperature warping stress, ensure the neat appearance of the pavement and improve the performance of ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/17G06F30/23G06F2119/06
Inventor 刘雨珊许涛汪洋曹炳勇时爽沈东亚
Owner NANJING FORESTRY UNIV
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