STRUCTURAL DURABILITY ASSESSMENT OF THE BENIN SAGAMU BYPASS OVERHEAD BRIDGE BY RELIABILITY THEORY
Abstract
The structural durability of key structural elements of the Benin-Sagamu overhead bypass bridge located at Oluku, Benin City, Edo state, was determined by the use of reliability theory. The bridge dimensions were measured to determine its dead load while manual traffic count was used to estimate the traffic live loads by calculating the Annual Average Daily Traffic and simulating the total number of vehicles that would use the bridge in 120 years similar to methods used in EN 1991-2 (2003). From the traffic survey data, the mean vehicle load was used as the representation of assessment vehicle live load. The assessment vehicle model closest to those in CS 454 was used as the assessment vehicle and its axle loads and dimensions adopted for structural analysis using the influence line theory. Moments from the analysis resulting from dead and live loads represented the bridge strength model. The resistance model of the bridge was derived from concrete strength by Non-Destructive testing and from the section properties. The reliability theory was applied to determine the reliability and probability of failure of the transverse and longitudinal girders of the bridge. The reliability index of the transverse girder and longitudinal girders were 3.9 and 5.2 respectively and compares favorably to target reliabilities of EN 1990 (2002). The reliability theory was found to be efficient in determining the structural durability by the use of manual traffic counts.
.
KEYWORDS: Assessment Vehicle, Bridge Structural Durability, Durability Assessment, Probability of Failure, Reliability theory.
Full Text:
PDFReferences
Assessment and Rehabilitation of Central European Highway Structures, ARCHES (2010). Executive Summary Report May 2010. 6th Framework Programme. Theme: Mobility & Transport, Safety & Security.
Bayrak, H. and Akgul, F. (2020). Reliability Analysis of a Reinforced Concrete Bridge Under Moving Loads. Challenge Journal of Concrete Research Letters Vol. 11. No. 2. Pp 31–38.
BS ISO 2394 (2013). General Principles on Reliability for Structures. BSI Group Headquarters. 39 Chiswick High Road London W4 4AL.
CS 451 (2020). Structural review and assessment of highway structures. Highway Structures & Bridges Inspection & Assessment. Design Manual for Roads and Bridges.
CS 454 (2020). Assessment of highway bridges and structures. Highway Structures & Bridges Inspection & Assessment. Design Manual for Roads and Bridges.
DMRB (2020). Bridges Engineering Division of the Department of Transport. (2020) Design Manual for Roads and Bridges.
Ede, A. N (2014). Cumulative Damage Effects of Truck Overloads on Nigerian Road Pavement. International Journal of Civil and Environmental Engineering IJCEE-IJENS Vol: 14 No: 01, Pp 21-26.
EN 1990 (2002). Eurocode - Basis of Structural Design. The European Union. European Committee for Standardization (CEM), Brussels.
EN 1991 Part 2 (2003). Eurocode 1 - Traffic Loads on Bridges. Actions on Structures. The European Union. European Committee for Standardization (CEM), Brussels.
Federal Highways Act (Control of Dimensions, weights and Axle Loads of Heavy Duty Goods Transport Vehicles) Regulations 2018. Vol. 00. No. 00.
FHA (2018). The Federal Highway Administration. U.S Department of Transportation. Traffic Data Computation Method. Publication No: FHWA-PL-18-027.
Francois, P. V. D. S. (2009). Derivation of a Traffic Load Model for the Structural Design of Highway Bridges in South Africa. Dissertation presented for the degree of Doctor of Philosophy. Faculty of Engineering at Stellenbosch University. South Africa.
Holicky, M. (2009). Reliability Analysis for Structural Design. SUN MedIA Stellenbosch Ryneveld Street, Stellenbosch, 7600.
Kohler Jochen (2017). Structural Aspects in Structural Engineering TKT4196. Norwegian University of Science and Technology, Norway.
Lark R. J. and Flaig K. D. (2005). The use of reliability analysis to aid bridge management. The Structural Engineer. Vol. 83. Issue 5. Pp27-31.
Pedroni N., Cadini F. and Zio E. (2017). Advanced Monte Carlo Methods and Applications. ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems Part A Civil Engineering. Vol. 3 Issue 4.
Roads Liaison Group (2013). Management of Highway Structures - A Code of Practice. The Stationery Office. London.
Stanojev, M. and Stojic, D. (2014). Reliability Analysis of Structures. : Architecture and Civil Engineering Vol. 12, No. 3, Pp. 265 – 272.
Refbacks
- There are currently no refbacks.
Copyright © 2022-2025. Department of Civil Engineering, Nnamdi Azikiwe University. All Rights Reserved..