Effect of earthquake ground motions on fragility curves of highway bridge piers based on numerical simulation

2001 ◽  
Vol 30 (12) ◽  
pp. 1839-1856 ◽  
Author(s):  
Kazi R. Karim ◽  
Fumio Yamazaki
Keyword(s):  
Numerical Simulation ◽  
Fragility Curves ◽  
Ground Motions ◽  
Bridge Piers ◽  
Highway Bridge ◽  
Earthquake Ground Motions

Damage Variation in Highway Bridge Piers for Rehabilitation with Different Reinforced Options

2013 ◽  
Vol 569-570 ◽  
pp. 254-261
Author(s):  
Consuelo M. Gómez-Soberón ◽  
Bertha Olmos-Navarrete ◽  
Manuel Jara-Díaz ◽  
José Manuel Jara-Guerrero
Keyword(s):  
Fragility Curves ◽  
Damage Index ◽  
Bridge Piers ◽  
Highway Bridge ◽  
Seismic Action ◽  
Damage Level ◽  
Degree Of Protection ◽  
Seismic Scenarios ◽  
Earthquake Zone ◽  
High Degree

Bridges are considered as vital components that require a high degree of protection to guarantee their functionality, even after significant earthquakes. So, the damage evaluation of current conditions of these structures is considered a necessary tool for inspection, maintenance and rehabilitation. Seismic fragility curves of a common highway bridge structure, with simple-supported girders, for different seismic scenarios, are evaluated in this paper. The selected bridge is a RC system with rectangular piers, forming a frame substructure; the bridge piers reinforcement is designed using steel jackets. Damage fragility curves are again evaluated for the reinforced system and compared with the initial condition; for that, a non-linear analyses with Ruaumoko program are accomplished, using a Takeda constitutive model and the damage index proposed by Parket al. As an external seismic action, artificial accelerograms are obtained based on signals registered in the most hazardous earthquake zone of Mexico. The probability changes of a certain damage level are verified for the obtained results.

scholarly journals Cumulative Damage Evaluation of RC Bridge Piers subjected to Multiple Earthquakes

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Do Hyung Lee ◽  
Byeong Hwa Kim ◽  
Jung Joong Kim ◽  
WooSeok Kim
Keyword(s):  
Reinforced Concrete ◽  
Seismic Analysis ◽  
Ground Motions ◽  
Bridge Piers ◽  
Stiffness Degradation ◽  
Earthquake Ground Motion ◽  
Concrete Bridge ◽  
Bridge Structure ◽  
Reinforced Concrete Bridge ◽  
Earthquake Ground Motions

Successive earthquakes of Kocaeli and Duzce within three months indicated that even the survived lifeline structures such as bridges under the former event may have damage or collapse potential under the latter event due to their possible stiffness degradation. It is thus important that a rigorous seismic analysis of such structures should account for the effect of prior earthquake damage. For this purpose, nonlinear seismic analysis of a reinforced concrete bridge structure has been carried out under both single and multiple earthquake ground motions. Behavior and response evaluation of the bridge piers subjected to such motions have been discussed in terms of using both flexure-axial and flexure-shear-axial interaction models. Analytical results show that the stiffness degradation under multiple earthquake ground motions is more pronounced than that under single earthquake ground motion. In addition, comparison of the response without and with shear demonstrates that shear deformation is of significance. The response with shear exhibits the increase in displacement demand and decrease in lateral force carrying capacity, leading to a decrease in energy dissipation capacity. It is concluded that seismic analysis of reinforced concrete bridge structure should account for the effect of multiple earthquake ground motions to assess the demand on such structure properly.

scholarly journals Influence of foundation compliance on the seismic response of bridge piers

1979 ◽  
Vol 12 (1) ◽  
pp. 22-34
Author(s):  
M. J. N. Priestley ◽  
R. Park ◽  
Ng Kit Heng
Keyword(s):  
Ground Motions ◽  
Plastic Hinge ◽  
Bridge Piers ◽  
Earthquake Ground Motions ◽  
System A ◽  
Ductility Factor ◽  
Factor Demand ◽  
Dynamic Analyses ◽  
Curvature Ductility ◽  
Spring System

The paper summarises the results of dynamic analyses of some single-stem and double-stem bridge piers responding to a range of earthquake ground motions, including both natural and synthetic earthquake records. The influence of foundation flexibility was modelled by an 'extended leg' analogy and by a more refined approach in which the soil is replaced by an equivalent spring system. A bilinear moment-curvature loop was assumed to model the plastic hinge behaviour. The curvature ductility factor demand of bridge piers with different foundation flexibilities was determined and compared with the rigid foundation case.

scholarly journals Seismic fragility of a highway bridge in Quebec retrofitted with natural rubber isolators

2014 ◽  
Vol 7 (4) ◽  
pp. 534-547
Author(s):  
G. H. Siqueira ◽  
D. H. Tavares ◽  
P. Paultre
Keyword(s):  
Natural Rubber ◽  
Seismic Isolation ◽  
Seismic Vulnerability ◽  
Fragility Curves ◽  
Ground Motions ◽  
Highway Bridge ◽  
Eastern Canada ◽  
Seismic Isolator ◽  
Rubber Bearing ◽  
Time Histories

This paper presents fragility curves for the evaluation of a highway bridge retrofitted with seismic isolator devices. The object of this study is the Chemin des Dalles bridge over Highway 55 located in Trois-Rivières in Quebec, Canada. A series of synthetic ground motions time histories compatible with eastern Canada are used to capture the uncertainties related to the hazard. The seismic isolator model represents natural rubber bearing placed under the longitudinal girders over the bents and the abutments of the bridge. NRB isolators are placed in these locations to uncouple the movement of the superstructure and the infrastructure, increasing the flexibility of the system and decreasing the forces transmitted to the infrastructure. Finally, a set of fragility curves for the as-built and retrofitted models are compared to evaluate the effectiveness of seismic isolation to decrease the seismic vulnerability of this bridge.

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