层状路基路面体系温度应力和变形问题的位移函数解法

doi:10.13722/j.cnki.jrme.2017.1441

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Abstract Based on the thermo-elasticity and McNamee-Gibson displacement function，a displacement function method，to study the development of thermal stress and thermal deformation in layered pavement structure，is presented. Starting with the governing equations of plane strain problem of thermo-elasticity，a relationship between the generalized strain and stress is established by using the displacement function and Laplace-Fourier transform. Combining with the contact and boundary conditions，strict solutions of the thermal-induced stress and deformation of the layered system are derived. The results show that the proposed method is capable of producing accurate solution to the thermal-induced deformation problems of layered pavement structures. Due to the time effect of heat conduction，the heat loading affects mainly the surface and base layers at the initial stage，and then the influenced region develops gradually towards the inner layers with the time going. The vertical thermal-induced expansion diminishes with the depth and the greatest expansion takes place at the surface layer，leading to the stress concentration and accordingly possible pavement cracking. It is therefore recommended that the bonding conditions between the surface and base layers should be strengthened to ensure the structural integrity of pavement structures.

Key words： foundations pavement structure thermal stress displacement function layered system integral transform

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	Articles by authors
	WANG Lujun1
	2
	ZHU Bin1
	2
	WEN Kai1
	2
	YANG Songqing1
	2

Cite this article:

WANG Lujun1,2,ZHU Bin1, et al. Displacement function method on thermal stress and thermal deformation problems for layered pavement structure[J]. , 2018, 37(7): 1691-1699.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1441 OR http://www.rockmech.org/EN/Y2018/V37/I7/1691

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