Pounding of superstructure segments in isolated elevated bridge during earthquakes

Abstract

SUMMARYPast severe earthquakes indicate that pounding may cause considerable damage or even lead to collapse of colliding structures. The aim of this paper is to present an analysis of pounding between superstructure segments of an isolated elevated bridge induced by the propagating seismic wave. High-damping rubber bearings (HDRBs), used as isolation devices, are modelled by proposed non-linear formulation and the significance of the bearings model for pounding is indicated. The results of the study show that pounding leads to the increase or decrease of the forces acting on piers, depending on the gap size between superstructure segments.1998 John Wiley & Sons, Ltd.

Pounding force assessment in performance‐based design of bridges

“…When the element is linear viscoelastic, they follow the Kelvin-Voigt models [2,8]. Their main disadvantage is that they provide a uniform energy dissipation all along the shock, which is not consistent with experimental evidence.…”

“…More recently, pounding between deck and abutments or between different deck portions has been studied. Results have highlighted the importance of pounding in modifying some demand parameters such as bending moments or base shear [8].…”

Nonsmooth Seismic Response Analysis of a Benchmark Straight Bridge With Deck-Abutment Impact-Induced Rotation

“…A limited number of studies consider the tangential contact forces due to friction when evaluating seismic behavior of the deck-abutment bridge system. An early exception is the study of Jankowski et al [6] which adopts linear dashpot elements to simulate the tangential contact forces between the contacting bodies. More recently, Amjadian et al [7] applied the Karnopp friction model to examine the response of curved bridges.…”

Shaking table experimental study on the effectiveness of polymer bearings for seismic isolation of structures

“…It allows us to extend the natural period of the structure and therefore avoid resonance with the ground motion. Moreover, by increasing damping in the isolation devices, more energy can be dissipated and thus the structural response can be further reduced [2].…”