Determination of Finite Element Modelling Errors for Box Culverts Using Field Load Tests

Yıl 2022, Cilt: 33 Sayı: 4, 12309 - 12328, 01.07.2022

Tuna Ülger

https://doi.org/10.18400/tekderg.1039744

Öz

Buried culverts have been in service more than half a century and their age raises questions about their reliable serviceability for the new standard vehicles. The gross weight and axle spacing of these trucks play an important role on the performance of the buried culverts where the culvert is covered with shallow fill heights. Field live load tests were conducted by driving a loaded truck over some culverts at slow speed while recording data at the critical locations of these culvert. Finite element (FE) models were developed and calibrated using field load test results. Live load distribution formulations were adopted from AASHTO LRFD Bridge Design Specifications for different fill heights. Two- and three-dimensional FE models were modelled and loaded separately to compare the critical section forces. The results showed that the error using two different FE modelling approach yields more than 100% error for the maximum section forces when fill heights is between 60 cm and 120 cm. This study is aimed to highlighting the inherent error in numerical modelling of buried reinforced box culverts for design or rating purposes.

Anahtar Kelimeler

box culvert, field test, fill height, load distribution, finite element modelling

Destekleyen Kurum

NA

Proje Numarası

NA

Teşekkür

This study is originally funded by Louisiana Transportation Research Center, and Louisiana Department of Transportation. Technical assistant of Louisiana State University and Bridge Diagnostics, Inc. during the field tests is acknowledged. The results presented here are only the author`s independent study and does not reflect any other parties interest or views.

Kaynakça

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