Probabilistic Seismic Demand Models and Fragility Estimates for Rc Bridges

Gardoni, Paolo; Mosalam, Khalid M.; Kiureghian, Armen Der

doi:10.1080/13632460309350474

Cited by 236 publications

(123 citation statements)

References 6 publications

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“…In addition, the mean and variance of 2 are s 2 =( 2) and 2 2 s 4 =[( 2) 2 ( 4)], respectively [30]. In this case, the mean vector of is equal to: …”

Section: Bayesian Updating Of Damage Index Modelmentioning

confidence: 99%

“…In this case, the exact form of (; ) is unknown. In structural analysis, the linear form as P p m=1 m h m (x) is usually used, where h m (x) is a set of suitable explanatory functions that may in uence the damage of the structure [30]. In Eq.…”

Section: Bayesian Updating Of Damage Index Modelmentioning

confidence: 99%

“…Gardoni [30], by using this sampling procedure, centered the density function at the maximum likelihood point to estimate the posterior mean vector of (; ) as follows:…”

Section: Bayesian Updating Of Damage Index Modelmentioning

confidence: 99%

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Bayesian updating of the Park-Ang damage index for RC frame buildings under near-fault ground motions

Yazdannejad

Yazdani

2017

Scientia Iranica

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Abstract. A procedure for updating the Park-Ang damage index of reinforced concrete building under near-fault ground motion is proposed. Rather than developing a new damage model, a correction term is added to the existing damage model within the Bayesian framework. The correction term is described as a linear function of the variation of sti ness of structures, which is a more consistent indicator of predicting the level of damage. The Bayesian method is an e ective approach when new data become available. The reinforced concrete building damage data during past near-fault pulse-like earthquakes were used in updating the damage model. The proposed damage index is conceptually simple and realistic.

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“…In addition, the mean and variance of 2 are s 2 =( 2) and 2 2 s 4 =[( 2) 2 ( 4)], respectively [30]. In this case, the mean vector of is equal to: …”

Section: Bayesian Updating Of Damage Index Modelmentioning

confidence: 99%

Section: Bayesian Updating Of Damage Index Modelmentioning

confidence: 99%

See 1 more Smart Citation

Bayesian updating of the Park-Ang damage index for RC frame buildings under near-fault ground motions

Yazdannejad

Yazdani

2017

Scientia Iranica

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“…Selecting an appropriate pair of IM and DM is a difficult task, as the PSDM results are practically sufficient and efficient (Gardoni et al 2002(Gardoni et al , 2003. In the current study, response history analyses (RHAs) are used to quantify the seismic demand of the reference structures.…”

Section: Probabilistic Demand Modelsmentioning

confidence: 99%

The influence of coupled horizontal–vertical ground excitations on the collapse margins of modern RC-MRFs

Farsangi

Tasnimi

2016

Int J Adv Struct Eng

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With the increasing interest in vertical ground motions, the focus of this study is to investigate the effect of concurrent horizontal-vertical excitations on the seismic response and collapse fragilities of RC buildings designed according to modern seismic codes and located near active faults. It must be stressed that only mid-to high-rise buildings are of significant concern in the context of this research. The considered structures are categorized as intermediate and special RC-MRFs and have been remodeled using distributed and lumped plasticity computational approaches in nonlinear simulation platforms, so that the utilized NL models can simulate all possible modes of deterioration. For better comparison, not only was the combined vertical and horizontal motion applied, but also a single horizontal component was considered for direct evaluation of the effect of the vertical ground motions (VGMs). At the member level, axial force variation and shear failure as the most critical brittle failure mechanisms were studied, while on the global level, adjusted collapse margin ratios (ACMRs) and mean annual frequency of collapse (k Collapse ) using a new vector-valued intensity measure were investigated. Findings from the study indicate that VGMs have significant effects on both local and global structural performance and cannot be neglected.

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“…buildings with particular importance, structures for which no empirical data are available (innovative structural designs, sub-standard and low strength RC structures). Different researchers Mosalam et al (1997), Lang (2002), Gardoni et al (2003), Franchin et al (2003), Rossetto and Elnashai (2005), Erberik and Elnashai (2005), Erberik (2008), Celik and Ellingwood (2008) have developed fragility curves for the gravity loaded design (GLD) structures of developed countries by using detailed analytical approach. The type of method chosen in these studies for fragility analysis depends not only on the objective of the assessment, but also on the availability of data and technology.…”

Section: Introductionmentioning

confidence: 99%

Seismic fragility assessment of existing sub-standard low strength reinforced concrete structures

Ahmad

Kyriakides

Pilakoutas

et al. 2015

Earthq. Eng. Eng. Vib.

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An analytical seismic fragility assessment framework is presented for the existing low strength reinforced concrete structures more common in the building stock of the developing countries. For realistic modelling of such substandard structures, low strength concrete stress-strain and bond-slip capacity models are included in calibrating material models. Key capacity parameters are generated stochastically to produce building population and cyclic pushover analysis is carried out to capture inelastic behaviour. Secant period values are evaluated corresponding to each displacement step on the capacity curves and used as seismic demand. A modiÞ ed capacity spectrum method is adopted for the degrading structures, which is further used to evaluate peak ground acceleration from back analysis considering each point on the capacity curve as performance point. For developing fragility curves, the mean values of peak ground acceleration are evaluated corresponding to each performance point on the series of capacity curves. A suitable probability distribution function is adopted for the secant period scatter at different mean peak ground acceleration values and probability of exceedance of limit states is evaluated. A suitable regression function is used for developing fragility curves and regression coefÞ cients are proposed for different conÞ dence levels. Fragility curves are presented for a low rise pre-seismic code reinforced concrete structure typical of developing countries.

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Probabilistic Seismic Demand Models and Fragility Estimates for Rc Bridges

Cited by 236 publications

References 6 publications

Bayesian updating of the Park-Ang damage index for RC frame buildings under near-fault ground motions

Bayesian updating of the Park-Ang damage index for RC frame buildings under near-fault ground motions

The influence of coupled horizontal–vertical ground excitations on the collapse margins of modern RC-MRFs

Seismic fragility assessment of existing sub-standard low strength reinforced concrete structures

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