A comparison between the stresses computed for finite sized precast concrete pavement units using westergaards equations and a numerical design method |
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| Authors: | Dr J W Bull and A Singh |
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| Institution: | Department of Civil Engineering University of Newcastle upon Tyne NE1 7RU, UK |
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| Abstract: | Westergaards equations are widely used in the design of rigid concrete highway and aircraft pavements. The equations assume that the pavements are either infinite or semi-infinite in extent. Recently, a numerical design procedure using finite elements has been introduced for finite sized precast concrete pavement units raft units]. The present paper compares the computed stress results from the two methods for the interior loading on a two metre square raft unit. The results show that there is no simple “slab-size correction factor” to correlate the stress output from the two design methods as suggested by other authors. Westergaards analysis should not be used to design finite sized raft units; the numerical design procedure is recommended. |
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