Alaska Bridge Bent Pushover Software, Including Concrete Confinement

Abstract and project information last updated: 1 March 2011. Project updates are dated below.

AUTC
Project
Number
107013
Principal
Investigator
Michael Scott (OSU)
michael.scott@oregonstate.edu
Funding
Agency

US Department of Transportation (RITA)

Alaska Department of Transportation & Public Facilities

Project
Budget
80000
Start
Date
3 August 2007
Estimated
End Date
31 December 2009

Abstract

The American Association of State Highway and Transportation Officials is developing new recommendations for bridge designs that can better withstand earthquakes. These new guidelines use pushover analysis, a technique where a computer model of a structure is subjected to increasing lateral loading until its components fail. Pushover analysis is an effective way to highlight any weakness in a bridge’s performance under earthquake conditions. However, there is no single, easy-to-use program available to design engineers. No programs focus on the bridge bent design (sometimes called a pier design) most commonly used in Alaska, where steel shells encase reinforced concrete columns to improve seismic performance. This project developed software customized for pushover analysis of Alaska-style bridge bents.