Title: Reliability-Based Evaluation of a 100-Year-Old Multi-Span Flat Slab Bridge

Author(s): Patryk J. Wolert, Andrzej S. Nowak, and J. Michael Stallings

Publication: Symposium Paper

Volume: 340

Issue:

Appears on pages(s): 221-232

Keywords: evaluation of existing structure, finite element modelling, flat slab bridge, live load testing, non-destructive testing, non-linear material models, reliability analysis, rosenblueth 2k+1 method

DOI: 10.14359/51725815

Date: 4/1/2020

Abstract:
Existing road infrastructure and bridges gradually carry increasing in weight and number vehicular traffic. The objective of this study is to assess adequacy of a 100-year-old reinforced concrete framed bridge in Alabama expressed as reliability index. Geometric data about the structure was obtained using destructive and nondestructive testing methods. Material data was collected from field tests and available literature on evaluation of existing structures. Behavior of the structure was investigated during load tests performed. The most harmful load configuration for the particular bridge was established in a recent study on weigh-in-motion data for the State of Alabama. Using finite element numerical method, a three dimensional model of the bridge was developed, calibrated and used for reliability study. The statistical parameters of resistance of the bridge were obtained using Rosenblueth 2k+1 method. The reliability analysis was demonstrated on the one span structural system.