Dynamic Interaction Analysis of PCC Bridge Abutment-Layered Soil System Subjected to Varying Earthquake Ground Motions in Indian Scenario | Chapter 6 | Engineering Research: Perspectives on Recent Advances Vol. 6

The present research investigates the linear static and dynamic structural behaviour of a PCC bridge abutment-layered soil system under varying earthquake ground motions. A numerical analysis of the interaction system is carried out using the latest version of ABAQUS/CAE-2024 considering it as a plane strain problem with different types of soil in the layered soil strata. Three significant earthquake- India-Burma (1988), Chamba (1995) and Bhuj (2001) are selected as ground motions to assess the dynamic structural response of the interaction system in the Indian scenario. Both static and dynamic analyses are performed to evaluate the displacement in the PCC abutment and underneath Layered soil strata. The model is created considering 2D plane strain condition in part module, with realistic soil properties (property module) and appropriate boundary conditions in ABAQUS/CAE-2024 software. The interaction between the abutment and the surrounding soil is modeled with contact-to-contact interaction, and then simulation is performed.

 

The results of analyses are presented for all three types of ground motions (low, medium and high intensities). The comparison of the displacements between static and dynamic analyses highlights the necessity of incorporating soil-structure interaction effects in the abutment-backfill and abutment-underpinning soil system. The India-Burma earthquake exhibited the highest horizontal displacement of 175mm compared to the Bhuj and Chamba earthquakes which developed horizontal displacement of 52mm and 36mm respectively. The static horizontal displacement of top most point of the abutment of 9.5mm remains significantly lower. In contrast, vertical displacement remained relatively consistent across all earthquake events and is found slightly higher than in static conditions (77 mm), indicating minimal impact on foundation settlement. The key objective of the research work is to understand the displacement, stress variations, and stability of the abutment system under earthquake excitations. These findings emphasize the importance of realistic soil modelling in improving the accuracy of seismic performance assessments for PCC bridge abutments.

 

 

Author (s) Details

Rishav Kumar
Department of Civil Engineering, Maulana Azad National Institute of Technology, Bhopal, India.

 

M.S Hora
Department of Civil Engineering, Maulana Azad National Institute of Technology, Bhopal, India.

 

Please see the book here:- https://doi.org/10.9734/bpi/erpra/v6/5067