Collapse Capacity of Inelastic Single-Degree-of-Freedom Systems Subjected to Mainshock-Aftershock Earthquake Sequences

Yu, Xiaohui; Li, Shuang; Lü, Dagang; Tao, Jing

doi:10.1080/13632469.2018.1453417

Cited by 31 publications

(19 citation statements)

References 32 publications

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“…For MainShock-AfterShock analysis, there is not a widely accepted criterion for utilizing real MS-AS sequence (Figure 7), probably due to the uncertainty and complexity associated with the selection of real MS-AS sequences [30]. Moreover, as stated by Ruiz-García [31] and Goda [32], in general, record characteristics of mainshock and aftershocks within the same sequences are different.…”

Section: Selecting the Seismic Records For The Study Of Behavior Undementioning

confidence: 99%

Comparison of Seismic Behavior of Buckling-restrained Braces and Yielding Brace System in Irregular and Regular Steel Frames under Mainshock and Mainshock-Aftershock

2019

IJE

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A B S T R A C TDue to low stiffness of braces after yielding, the structures with buckling-restrained braces (BRBs) experience high residual drifts during an earthquake, which can be intensified by aftershocks and causes considerable damages to structures. Also, due to poor distribution of stiffness, this problem is exacerbated for irregular structures. Recently, the yielding brace system (YBS) has been introduced; which is an alternative to BRBFs to solve this problem. YBS has a secondary stiffening part in its hysteresis behavior which can prevent excessive deformations. Therefore, structures with YBS are expected to show a better peroformance in seismic sequences compared to BRBs. However, the seismic behavior of the YBS system in irregular structures has not been studied so far. On this basis, this paper investigates the seismic behavior of frames with BRB and YBS in regular and irregular structures under seismic sequences. Twenty four 4-, 8-, and 12-story frames with these two systems were designed and evaluated. First, a nonlinear dynamic analysis was conducted on the frames under mainshocks, and the maximum interstory drift and the residual interstory drift of the frames were compared. Then, using incremental dynamic analysis and fragility curves, the behavior of the frames under mainshocks was investigated. Afterwards, using incremental dynamic analysis and fragility curves, the behavior of the structures under mainshock-aftershock in three performance levels was also investigated. The results showed that YBS bracing, especially in low rise structures, leads to far lower maximum drifts and maximum residual drifts than BRB braces, which can reduce the probability of the occurrence of soft stories in structures.

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Section: Selecting the Seismic Records For The Study Of Behavior Undementioning

confidence: 99%

Comparison of Seismic Behavior of Buckling-restrained Braces and Yielding Brace System in Irregular and Regular Steel Frames under Mainshock and Mainshock-Aftershock

2019

IJE

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“…Gaetani d'Aragona et al 16 evaluated aftershock fragility of non-ductile RC frames for mainshcok scenarios with different return periods. On the other hand, there were studies [17][18][19] focusing on the relationship between the characteristics of main and aftershocks, e.g., the decline of the aftershock frequency after the occurrence of a mainshock.…”

Section: Introductionmentioning

confidence: 99%

Bayesian‐network‐based risk modeling and inference for structures under a sequence of main and aftershocks

Mun

Song

2022

Earthq Engng Struct Dyn

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A sequence of main and aftershocks is a complex natural hazard, which may introduce severe damage to critical infrastructure systems. Managing the risk caused by sequential earthquake events is challenging due to the uncertainties of aftershocks and their dependency on the preceding mainshock. Moreover, the dynamic behavior of a structural system under aftershocks must be evaluated with consideration of possible structural damage caused by the mainshock. To overcome these difficulties, this paper proposes a new framework based on a Bayesian network (BN) for risk modelling and inference for structures under a sequence of main and aftershocks. The stochastic mechanisms of sequential earthquakes and the hysteretic behavior of structures are described by BN models, which are then integrated for comprehensive modeling of the risk. The developed BN model facilitates probabilistic inference to obtain fragility curves given various circumstances regarding sequential earthquake events and observations. Numerical examples demonstrate fragility assessment and inference with the proposed BN-based framework.

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“…It should be noted that the final, accumulated, damage includes the initial damage caused by major earthquake and the incremental damage caused by the following seismic sequence. The effect of successive seismic events on the structural performance has been thoroughly examined by many researchers [2][3][4][5][6]. Specifically, Amadio et al [7] studied the influence of repeated shocks on the response of nonlinear Single Degree of Freedom (SDOF) systems using different hysteretic models.…”

Section: Introductionmentioning

confidence: 99%

Structural Damage Prediction of a Reinforced Concrete Frame Under Single and Multiple Seismic Events Using Machine Learning Algorithms

Lazaridis¹,

Kavvadias²,

Demertzis³

et al. 2022

Preprint

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Advanced machine learning algorithms, have the potential to be successfully applied to many areas of system modelling. In the present study the capability of ten machine learning algorithms in predicting the structural damage of an 8-storey reinforced concrete frame building subjected to single and successive ground motions is examined. From this point of view, the initial damage state of the structural system, as well as 16 well known ground motion intensity measures are adopted as the features of the machine-learning algorithms that aim to predict the structural damage after each seismic event. The structural analyses are performed considering both real and artificial mainshock–aftershock sequences, while the structural damage is expressed in terms of two overall damage indices. The comparative study results in the most efficient damage index, as well as the most promising machine learning algorithm in predicting the structural response of a reinforced concrete building under single or multiple seismic events. Finally, the configured methodology deployed in a user-friendly web-application.

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Collapse Capacity of Inelastic Single-Degree-of-Freedom Systems Subjected to Mainshock-Aftershock Earthquake Sequences

Cited by 31 publications

References 32 publications

Comparison of Seismic Behavior of Buckling-restrained Braces and Yielding Brace System in Irregular and Regular Steel Frames under Mainshock and Mainshock-Aftershock

Comparison of Seismic Behavior of Buckling-restrained Braces and Yielding Brace System in Irregular and Regular Steel Frames under Mainshock and Mainshock-Aftershock

Bayesian‐network‐based risk modeling and inference for structures under a sequence of main and aftershocks

Structural Damage Prediction of a Reinforced Concrete Frame Under Single and Multiple Seismic Events Using Machine Learning Algorithms

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