Damage-Involved Structural Pounding in Bridges under Seismic Excitation

Robert Jankowski

doi:10.4028/www.scientific.net/kem.754.309

Damage-Involved Structural Pounding in Bridges under Seismic Excitation

Abstract

During severe earthquakes, pounding between adjacent superstructure segments of highway elevated bridges was often observed. It is usually caused by the seismic wave propagation effect and may lead to significant damage. The aim of the present paper is to show the results of the numerical analysis focused on damage-involved pounding between neighbouring decks of an elevated bridge under seismic excitation. The analysis was carried out using a lumped mass structural model with every deck element discretized as a SDOF system. Pounding was simulated by the use of impact elements which become active when contact is detected. The linear viscoelastic model of collision was applied allowing for dissipation of energy due to damage at the contact points of colliding deck elements. The results show that pounding may substantially modify the behaviour of the analysed elevated bridge. It may increase the structural response or play a positive role, and the response depends on pattern of collisions between deck elements. The results also indicate that a number of impacts for a small in-between gap size is large, whereas the value of peak pounding force is low. On the other hand, the pounding force time history for large gap values shows only a few collisions, but the value of peak pounding force is substantially large, what may intensify structural damage.

Citations

3

CrossRef
0

Web of Science
3

Scopus

Author (1)

Robert Jankowski prof. dr hab. inż.

Cite as

Full text

full text is not available in portal

full content of the article see on external site open in new tab

Keywords

Details

Category:: Articles
Type:: publikacja w in. zagranicznym czasopiśmie naukowym (tylko język obcy)
Published in:: Key Engineering Materials no. 754, pages 309 - 312,
ISSN: 1662-9795
ISSN:: 1662-9795
Language:: English
Publication year:: 2017
Bibliographic description:: Jankowski R.. Damage-Involved Structural Pounding in Bridges under Seismic Excitation. Key Engineering Materials, 2017, Vol. 754, , s.309-312
DOI:: Digital Object Identifier (open in new tab) 10.4028/www.scientific.net/kem.754.309
Verified by:: Gdańsk University of Technology