Near-Fault Ground Motion Effects on Reinforced Concrete Bridge Columns

Phan, Vu To-Anh; Saiidi, Mehdi S.; Anderson, John G.; Ghasemi, Hamid

doi:10.1061/(asce)0733-9445(2007)133:7(982)

Cited by 103 publications

(55 citation statements)

References 4 publications

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“…A framework for consideration of residual displacements during design and postearthquake safety assessment is presented by Phan et al (2007). In particular, the method aims to predict the allowable live load carrying capacity that is expected to remain after an earthquake.…”

Section: Performance Assessment Methodsmentioning

confidence: 99%

“…However, no apparent relationship is found between the period of the velocity pulse and the residual displacement to maximum displacement ratio d rm . The results obtained from three shaking table tests is presented by Phan et al (2007). The units are subjected to two ground motions with the same peak-acceleration but different velocity history characteristics.…”

Section: Ground Motion Characteristicsmentioning

confidence: 99%

“…Pettinga (2006) simulated the dynamic response of these systems and remarks noticeable differences between the predicted and the measured residual diaphragm rotations. Phan et al (2007) tested two RC columns dynamically and simulated their response using a new rule based hysteretic model. The hysteretic model is referred as O-Hyst ("O" stands for "offset").…”

Section: Accuracy Of Time-history Analysismentioning

confidence: 99%

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The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Yazgan

Dazio

2011

Georisk: Assessment and Management of Risk for Engineered Syste

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PrefaceModern performance based earthquake engineering addresses design, evaluation, construction, maintenance and decommission of structures and requires that their performance during an earthquake can be predicted with a known degree of accuracy. In this framework the importance of residual displacements is twofold: On one hand they represent a significant source of damage affecting mainly the serviceability and the repairability of the structure. On the other hand, after an earthquake, residual displacements are often the only measurable indicator of the shaking occurred during the earthquake. In the framework of a pre-earthquake design or assessment process, the expected residual displacements need to be predicted; while during a post-earthquake assessment the actual residual displacements can be measured.Within his present doctoral dissertation, Mr. Yazgan developed and validated against experimental evidence a new and original methodology to improve the estimate of maximum deformations occurred during an earthquake taking into account both observable damage and measurable residual displacements. The methodology is based on the Bayesian probabilistic theory and, as a particular novelty, explicitly considers model error. To estimate model error Mr. Yazgan carried out a very extensive study on the numerical modelling of structures under earthquake, which also allowed the formulation of practical modelling recommendations. The quantification of model error is of course of fundamental importance also for any realistic pre-earthquake prediction of residual displacements.The thorough and comprehensive work presented by Mr. Yazgan allows a deep understanding of the challenges relevant to the use of residual displacements in the seismic performance assessment of structures and his developments represent a new effective way to achieve this important goal. Zurich, January 2010Dr. Alessandro Dazio SummarySafety assessment of damaged structures is a pivotal part of the post-earthquake recovery process. As a result of the deformation histories that have occurred during the damaging earthquake, the key structural properties of the columns, beams and walls that contribute to the seismic resistance change. The key structural properties include stiffness, strength and deformation capacity. An accurate estimation of the residual key structural properties is crucial in identifying vulnerability of the damaged structure.These residual structural properties are known to be strongly dependent on the maximum deformations that have occurred. A new post-earthquake assessment method is developed following this premise. After an earthquake, the maximum deformations experienced by a damaged structure can be estimated using the developed method.The essential idea behind the method is to probabilistically estimate the experienced maximum deformations based on the post-earthquake residual displacements and the visible structural damage. The major uncertainties related to the estimated maximum deformations are explicitly treated in the me...

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Section: Performance Assessment Methodsmentioning

confidence: 99%

Section: Ground Motion Characteristicsmentioning

confidence: 99%

Section: Accuracy Of Time-history Analysismentioning

confidence: 99%

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The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Yazgan

Dazio

2011

Georisk: Assessment and Management of Risk for Engineered Syste

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“…In particular, the pulse-like near-fault ground motions caused by the forward effect and slip effect have a significant dynamic effect on structures, which lead to severe structural damage [1,2,3]. The seismic responses of bridge piers such as strain, curvature and drift ratio can be further amplified, the residual displacements of piers are also very significant for piers under the near-fault ground motions [4,5,6,7]. Therefore, the damage of piers and its probabilities of occurrence should be studied further to investigate the seismic risk of the bridge system.…”

Section: Introductionmentioning

confidence: 99%

Seismic Vulnerability Models of Piers Under Near-Fault Ground Motions

Chen¹,

Wang²,

Yin³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…For common reinforced concrete members, lots of experimental investigations have been conducted (Nilson and Arthur 1968;Bathe and Ramaswamg 1979;Priestly and Benzoni 1996;Lehman et al 1995;Phan et al 2007;Hindi 2005;Hindi et al 2005;Wang et al 2014;Afefy and El-Tony 2016;Jiong 2004;Li and Ren 2009;Elmorsi et al 1998;Esmaeily and Shirmohammadi 2014;Shao et al 2005;Zendaoui et al 2016;Ren et al 2010). Previous studies of reinforced concrete members have demonstrated that slender ratio, material property, axial compression ratio, reinforcement ratio, detailing art and stirrups played significant roles in the seismic behavior, especially the hysteretic performance of reinforced concrete members.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Researches on the Seismic Behavior of Tubular Reinforced Concrete Columns of Air-Cooling Structures

Bai

et al. 2017

Int J Concr Struct Mater

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Tubular reinforced concrete columns of air-cooling condenser structures, which undertake the most weight of air cooling equipment, are the major components to resist lateral forces under earthquake. Once collapsed, huge casualties and economic loss would be caused. Thus, four 1/8 scaled specimens were fabricated and tested through the pseudo-static testing method. Failure modes and crack patterns of the specimens under cyclic loading were observed. Then, finite element models of tubular reinforced concrete columns were established using OpenSees and were verified with the experimental results. Finally, the influence of axial compression ratio and longitudinal reinforcement on energy dissipation capacity and stiffness degradation were studied based on the validated finite element modes. It is confirmed that tubular reinforced concrete columns of air-cooling condenser structure exhibit a moderate ability of energy dissipation, and the nonlinear finite element model could reasonably simulate its seismic behavior. Furthermore, axial compression ratio and longitudinal reinforcement are main factors which affect the seismic behavior of the tubular reinforced concrete columns. The experimental results and simulation method provide an available way to design this kind of large tubular reinforced concrete columns with thin-wall.

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Near-Fault Ground Motion Effects on Reinforced Concrete Bridge Columns

Cited by 103 publications

References 4 publications

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

The use of post-earthquake residual displacements as a performance indicator in seismic assessment

Seismic Vulnerability Models of Piers Under Near-Fault Ground Motions

Experimental and Numerical Researches on the Seismic Behavior of Tubular Reinforced Concrete Columns of Air-Cooling Structures

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