Predicting the seismic collapse capacity of adjacent SMRFs retrofitted with fluid viscous dampers in pounding condition

Kazemi, Farzin; Mohebi, Benyamin; Jankowski, Robert

doi:10.1016/j.ymssp.2021.107939

Cited by 48 publications

(15 citation statements)

References 58 publications

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“…Moreover, others tackled the site and soil condition of the adjacent building [13,51]. Eventually, the mitigation measures were presented in many studies as in [6,52,53].…”

Section: Numerical Studies In Structure-levelmentioning

confidence: 99%

Seismic Pounding Between Adjacent Buildings: A Review

Mohamed¹

2021

Academic Platform Journal of Natural Hazards and Disaster Management

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The collision between adjacent buildings with an insufficient seismic separation distance has been reported after earthquakes. This collision between adjacent buildings, commonly referred to as earthquake-induced pounding, entails huge damages to the involved buildings. The main cause of damage was interpreted to the developed impact forces between colliding buildings. The intensity of the impact force relies on many factors, therefore, a significant research effort was found to address this issue from different perspectives. This paper presents a summary of the main research conducted in the context of structural pounding namely, field observations, experimental and numerical studies. The main recommendations and results of each category have been highlighted and insights for future research are provided.

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“…Moreover, others tackled the site and soil condition of the adjacent building [13,51]. Eventually, the mitigation measures were presented in many studies as in [6,52,53].…”

Section: Numerical Studies In Structure-levelmentioning

confidence: 99%

Seismic Pounding Between Adjacent Buildings: A Review

Mohamed¹

2021

Academic Platform Journal of Natural Hazards and Disaster Management

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“…The curved damper (Figure 1b) has superior performance to enhance stiffness and reduce inter-story drift. In addition, the curved damper is practically convenient and it can be easily implemented on structural maintenance [44]. Thus, two curved dampers at each floor are installed to create a modified system, as shown in Figure 2b.…”

Section: Six-story Shear Buildingmentioning

confidence: 99%

“…For example, the Federal Emergency Management Agency (FEMA) provides guidelines for retrofitting structures by adding additional bracing in the existing structures [43]. Furthermore, curved dampers (CDs) and fluid viscous dampers (FVDs) are installed in building structures to enhance initial stiffness (Figure 1a,b) [44,45]. In addition, some specially made braces such as the buckling-restrained brace (BRB) allow the structural system to have a better seismic-bearing ability (Figure 1c), as stiffness is improved [46].…”

Section: Introductionmentioning

confidence: 99%

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Stiffness Modification-Based Bayesian Finite Element Model Updating to Solve Coupling Effect of Structural Parameters: Formulations

Zeng

Kim

2021

Applied Sciences

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The Bayesian model updating approach (BMUA) benefits from identifying the most probable values of structural parameters and providing uncertainty quantification. However, the traditional BMUA is often used to update stiffness only with the assumption of well-known mass, which allows unidentifiable cases induced by the coupling effect of mass and stiffness to be circumvented and may not be optimal for structures experiencing damages in both mass and stiffness. In this paper, the new BMUA tailored to estimating both mass and stiffness is presented by using two measurement states (original and modified systems). A new eigenequation with a stiffness-modified system is formulated to address the coupling effect of mass and stiffness. The posterior function is treated using an asymptotic approximation method, giving the new objective functions with stiffness modification. Analytical formulations of modal parameters and structural parameters are then derived by a linear optimization method. In addition, the covariance matrix of uncertain parameters is determined by the inverse of the Hessian matrix of the objective function. The performance of the proposed BMUA is evaluated through two numerical examples in this study; a probabilistic damage estimation is also implemented. The results show the proposed BMUA is superior to the traditional one in mass and stiffness updating.

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“…Post-earthquake surveys have demonstrated that the pounding configuration plays a key role in the performance of buildings that undergo pounding [9,21], and buildings with a particular configuration are more likely to experience severe damage than others. Configurations that have been identified as more vulnerable include adjacent buildings exhibiting floor-to-column alignments [21][22][23][24], adjacent buildings with significant mass or height differences [22,25], buildings at the end of a row of buildings [21,26], and buildings likely to experience eccentric pounding [9,13,15,21,27]. Therefore, it can be seen that assessing the seismic risk of building portfolios at the urban or regional level with more realism requires the availability of fragility functions that account for the occurrence of these different pounding phenomena.…”

Section: Introductionmentioning

confidence: 99%

Seismic Fragility Functions for Non-Seismically Designed RC Structures Considering Pounding Effects

Mohamed

Romão

2021

Buildings

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The proposed study develops fragility functions for non-seismically designed reinforced concrete structures considering different pounding configurations. The study addresses an existing research gap, since large-scale seismic risk assessment studies involving the seismic performance assessment of building portfolios usually do not involve fragility functions accounting for the possibility of pounding. The selected structures include configurations involving different separation distance values and exhibiting floor-to-floor pounding, floor-to-column pounding, pounding between structures with a significant height difference, and pounding between structures with a significant mass difference. The behaviour of these pounding configurations was analysed using incremental dynamic analysis and compared with that of the corresponding control cases (i.e., individual structures with no interaction with other structures). The results indicate the type of failure mechanism that contributes to the global collapse of the different configurations and the influence of the separation distance. Results highlight the main differences between the expected performance of different pounding configurations with respect to the occurrence of the failure mechanism that governs their collapse. Finally, results indicate that large-scale seismic risk assessment studies should consider fragility functions accounting for different pounding configurations when the possibility of pounding is not negligible, except in cases involving floor-to-floor pounding.

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Predicting the seismic collapse capacity of adjacent SMRFs retrofitted with fluid viscous dampers in pounding condition

Cited by 48 publications

References 58 publications

Seismic Pounding Between Adjacent Buildings: A Review

Seismic Pounding Between Adjacent Buildings: A Review

Stiffness Modification-Based Bayesian Finite Element Model Updating to Solve Coupling Effect of Structural Parameters: Formulations

Seismic Fragility Functions for Non-Seismically Designed RC Structures Considering Pounding Effects

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