Unseating prevention for bridges using superelastic elements

B. Andrawes, R. DesRoches, Y. Kajita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Unseating of bridge spans due to excessive relative hinge opening is a common problem for bridges subjected to strong ground motion. Various unseating prevention devices have been developed in both the United States and Japan to try to reduce the likelihood of collapse due to unseating. This paper presents the results of the evaluation of unseating prevention devices using Nitinol Shape Memory Alloy materials. Superelastic shape memory alloys have the ability to remain elastic under very large deformations, due to a solid-state martensitic transformation. This unique property leads to enhanced performance of the adaptive superelastic unseating prevention device, compared with conventional devices used in the United States and Japan. To assess the effectiveness of the devices, nonlinear time history analyses are performed on two typical bridges in the United States and Japan. A multi-frame reinforced concrete box girder bridge is analyzed using a suite of representative ground motions. The results show that for both bridge types the adaptive superelastic devices are very effective in limiting the relative hinge displacement and preventing unseating.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure
Pages831-836
Number of pages6
StatePublished - Dec 1 2003
Externally publishedYes
Event1st International Conference on Structural Health Monitoring and Intelligent Infrastructure, SHMII-1'2003 - Tokyo, Japan
Duration: Nov 13 2003Nov 15 2003

Publication series

NameStructural Health Monitoring and Intelligent Infrastructure - Proceedings of the 1st International Conference on Structural Health Monitoring and Intelligent Infrastructure
Volume2

Other

Other1st International Conference on Structural Health Monitoring and Intelligent Infrastructure, SHMII-1'2003
CountryJapan
CityTokyo
Period11/13/0311/15/03

ASJC Scopus subject areas

  • Building and Construction
  • Architecture

Fingerprint Dive into the research topics of 'Unseating prevention for bridges using superelastic elements'. Together they form a unique fingerprint.

Cite this