Analysis, Design and Economic Implications of Tall Pier Bridge and Foundation

Patel Nirav M.; Prof. Deepa H. Raval

CALL FOR PAPERS : Dec-2023

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25-Dec-23

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Analysis, Design and Economic Implications of Tall Pier Bridge and Foundation

Author(s):

Patel Nirav M. , L.D.College of Engineering, Ahmedabad; Prof. Deepa H. Raval, L.D.College of Engineering, Ahmedabad

Keywords:

High pier; Non-linear method; RC bridge; Seismic condition; Time-history analysis; 3D modelling

Abstract:

This dissertation work describes a methodology for the analysis and design of Reinforced Concrete (RC) tall bridge piers with various cross sections (Solid Circular and Double Cylindrical) and its foundation, which are typically used in deep valley bridge viaducts. Piers are usually considered tall when the shaft has a height of 30 m or more. Three different cross sections of tall piers have been studied for road bridges varying 30m and 100m in height and also varying grade of concrete from M40, M50, M60 and M70 of pier. Cost comparison has been carried out of tall pier road bridges. The aim of this study is to generate database for preliminary design of tall pier R.C. bridges under seismic loading. Using the database, the user would be able to establish design of the bridges, given the structural scheme and other design parameters, Understanding the behaviour of tall pier bridges under seismic condition and also Design of Pier as per IRC: 112-2011 (Limit State) and Design of Pile Foundation as per IS: 2911-2010 part-II. The study report contains charts that represent material quantities and cost for initial estimates for different types of pier forms for tall bridges. From the study it seems that most suitable pier height for tall bridges is in between 70 m to 80 m. It also represent that most efficient L/D Ratio is in between 21 to 22.5.