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原文传递 ANALYSIS AND DESIGN OF CONCRETE PAVEMENTS: A NEW APPROACH

题名：	ANALYSIS AND DESIGN OF CONCRETE PAVEMENTS: A NEW APPROACH
其他题名：	1.Bradbury,R.D.(1938)."Reinforced Concrete Pavement",Wire Reinforcement,Washington,D.C.
正文语种：	英文
作者：	Swarna Suryateja
关键词：	westergaard；temperature；stress；computed；three-dimensional；winkler；analysis；software；element；present
摘要：	Westergaard's theory is usually used for the computation of stresses due to single wheel load with linear temperature gradients in concrete pavements and the foundation is assumed to be liquid foundation also termed as Winkler foundation. Wheel load and temperature stresses are found to be generally correct for interior and edge loading conditions as validated by Finite Element Method. The algebraic addition of wheel load and temperature stresses computed using Westergaard's and Bradbury's approach does not give correct values of stresses because superposition principle is not valid in such cases as there is loss of contact between the concrete slab and the foundation during curling. IRC:58-2002 design charts are developed using IITRIGID program which is based on Westergaard's basic approach. However, IRC:58-2011 and IRC:58-2015 design charts are developed using DOS based KGPSLAB software which uses finite element analysis with the assumption that the Dry Lean Concrete (DLC) acts as a Winkler Foundation (WF). WF implies zero shear strength for the DLC which is not valid and stress computation may not be correct. The present work presents a new analytical approach for the analysis of stresses in concrete pavement resting on DLC with a bond breaking layer of the plastic sheet at the interface, a condition very close to a real condition. The two layers pavement rests on a Winkler foundation. Stresses are computed both in pavement slab and DLC by three-dimensional finite element using ANSYS software. The stress values computed as per the new approach will be closer to the field condition. The analysis indicates that the stresses in PQC are not vastly different from those reported in IRC:58-2015 for bottom up cracking for a number of cases but stresses in DLC also can be computed to examine the safety of the support.
出版年：	2017
论文唯一标识：	I-75Y2017V45N12007
英文栏目名称：	Technical Papers
期刊名称：	Indian Highways
拼音刊名(出版物代码)：	I-75
卷：	45
期：	12
页码：	37-42