Abstract
This project aims to transform inspection data into risk-informed decision-making, leading to two main advancements. First, a new method is developed to account for the combined effect of soil stress history and scour hole on laterally and axially loaded piles in sand and clay. The methodology is validated with results from field tests for no-scour scenarios and verified with numerical models for scour scenarios. Quantification of the soil effects is investigated through lateral pile deflection and load-settlement curves for lateral and axial behaviors, respectively. Stress history increases up to 34.1% and 61.1% in estimated pile settlement for sand and clay, respectively, leading to potential unconservative designs if soil effects are not properly included in the analysis. Second, a new approach is developed to account for the impact of stress history in layered soils for seismic vulnerability assessment of scoured bridges. The so-called equivalent stress history and layered effects approach is to capture the impact of soil stress history of layered soils. Rather than assuming homogeneous soil deposits, the methodology enables analysis of bridges located in typically layered soil profiles. This approach utilizes conservation of strength and mass to derive corresponding soil and depth parameters. Neglecting stress history impacts in layered soils can lead to an underestimation of the single pile axial displacements by up to 35% in static analysis, and underestimation of the probability of exceeding bridge deck deflection thresholds by up to 25% in seismic fragility assessment. The work demonstrates the importance of including these soil effects in the assessment of bridges vulnerable to scour.
Recommended Citation
Tien, Iris and Zhang, Yijian, "Final Report - Data-Driven Risk-Informed Bridge Asset Management and Prioritization across Transportation Networks" (2024). Project RR-2. 1.
https://scholarsmine.mst.edu/project_rr-2/1
Department(s)
Civil, Architectural and Environmental Engineering
Research Center/Lab(s)
INSPIRE - University Transportation Center
Sponsor(s)
Office of the Assistant Secretary for Research and Technology U.S. Department of Transportation 1200 New Jersey Avenue, SE Washington, DC 20590
Keywords and Phrases
Bridge, Inspection Data, Scour, Layered Soils, Piles, Risk Assessment
Report Number
INSPIRE-021
Document Type
Technical Report
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2025 Missouri University of Science and Technology, All rights reserved.
Publication Date
June 30, 2024
Comments
Principal Investigator: Iris Tien, Ph. D.
Grant #: USDOT # 69A3551747126
Grant Period: 11/30/2016 - 09/30/2024
Project Period: 07/01/2020 - 06/30/2024
This investigation was conducted under the auspices of the INSPIRE University Transportation Center.