Influence of earthquake record truncation on fragility curves of RC frames with different damage indices

Khaloo, Alireza; Nozhati, Saeed; Masoomi, Hassan; Faghihmaleki, Hadi

doi:10.1016/j.jobe.2016.05.003

Cited by 36 publications

(8 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Diaz et al [17] developed a damage index based on a linear combination of two energy functions, i.e., the strain energy and the dissipated energy, and applied this energy-based damage index for seismic performance of low-rise steel buildings. e deformationbased damage indices, e.g., peak inelastic deformation, peak roof displacement, and interstory drift, are viewed as the simple and direct index reflecting the structural damage [18,19]. e advantage of this damage index is that it can be used conveniently in many respects with a clear physical meaning.…”

Section: Introductionmentioning

confidence: 99%

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

Wang

2019

Advances in Civil Engineering

View full text Add to dashboard Cite

Cumulative plastic strain (CPS) damage index is proposed in this study for seismic fragility analysis by integrating the force analogy method into the energy balance equation, and CPS can be defined as the ratio of the demand of plastic dissipation energy to its capacity. The cumulative plastic strain can indicate the structural damage cumulative effect under earthquakes, which makes it especially suitable to be selected as the damage index for the structural component. Threshold values of cumulative plastic strain for different performance limit state (PLS) levels are obtained through the degree of consistency of interstory drift-based fragility curves and CPS-based fragility curves. Regarding the multidimensional fragility evaluation, CPS and the floor acceleration will be selected as the quantification indices for performance limit state of the structural component and nonstructural component, respectively. The probabilistic seismic demand model (PSDM) following multivariate logarithmic normal distribution will be developed, and taking PLS uncertainty and correlation into consideration, multidimensional PLS function is constructed to identify the structural failure domain. A full-scale 2-bay 2-story frame structure for the Network for Earthquake Engineering Simulation (NEES) project is employed as the case study structure to demonstrate the proposed theory. Nonlinear dynamic time-history analysis is carried out for the structure to obtain its maximum responses under earthquakes. Consequently, the multidimensional fragility curves can be derived on the basis of CPS. Besides, the influence of PLS threshold value, engineering demand parameter (EDP) correlation, and PLS correlation on the multidimensional fragility is investigated. Results show that (1) CPS damage index can fully consider the cumulative effect of damage under earthquakes, which makes up for the deficiency of the interstory drift damage index in this aspect, (2) the multidimensional fragility framework can deal with the PLS correlation and EDP correlation simultaneously, which will generate a more precise seismic damage assessment result, and (3) multidimensional fragility is sensitive to PLS threshold values and PLS correlation parameters.

show abstract

Section: Introductionmentioning

confidence: 99%

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

Wang

2019

Advances in Civil Engineering

View full text Add to dashboard Cite

show abstract

“…In this respect, five reference buildings, ranging from 20 to 60 storeys in height, were determined. Analyses of these structures were performed according to the fibre hinge approach They used fibre hinge model approach in nonlinear analyses [30].…”

Section: Plastic Hinge Model Used For Nonlinear Modellingmentioning

confidence: 99%

Seismic assessment of existing RC buildings before and after shear-wall retrofitting

Lakušić¹

2018

JCE

View full text Add to dashboard Cite

The existing reinforced concrete (RC) buildings are analysed in the paper before and after shear-wall retrofitting. For numerical application, an existing RC building was selected and retrofitted with shear walls. Incremental dynamic analyses and static pushover analysis of these buildings were performed using the distributed plastic hinge approach. The results show that seismic retrofitting with shear walls increases rigidity and capacity of the building, while decreasing lateral displacements and damage.

show abstract

“…Compared with the IDA method, this method consumed less time, but the results were conservative . Subsequently, these methods were applied to approximately evaluate seismic demands of structure . Liao, Wen, and Foutch calculated the collapse resistance of steel frame through IDA and elastic–plastic time‐history analysis.…”

Section: Introductionmentioning

confidence: 99%

Seismic fragility analysis of concrete encased frame‐reinforced concrete core tube hybrid structure based on quasi‐static cyclic test

Xiao

Zeng

Chen

et al. 2019

Structural Design Tall Build

View full text Add to dashboard Cite

Summary Concrete‐encased frame‐core tube hybrid structural system has been widely employed in high‐rise buildings. This paper intends to analyze the seismic fragility of this structural system under ground motion excitation. The quasistatic cyclic test on a 1/5‐scaled, 10‐story three‐bay specimen is introduced. Fiber‐based finite element model is developed and integrated with numerical techniques that would be able to simulate the nonlinear response based on the OpenSees program. As the model is verified by the experimental data, a series of incremental dynamic analyses (IDAs) considering different frame‐tube stiffness ratios are carried out. IDA curves are drawn to describe each structural performance state. Fragility curves and probabilistic demand models are proposed for quantifying failure probability. The collapse margin ratio is employed to evaluate the collapse probability. The result shows that the collapse probability under rare earthquake still meets the requirement of Applied Technology Committee‐63 Report. The hybrid structure is proved to perform superior collapse resistance ability. The proper increase in the stiffness of core tube can reduce the collapse probability and enhance the collapse resistance capacity.

show abstract

Influence of earthquake record truncation on fragility curves of RC frames with different damage indices

Cited by 36 publications

References 16 publications

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

[Retracted] Multidimensional Fragility Analysis for a NEES Frame Structure by Integrating a New Energy Damage Index: Cumulative Plastic Strain

Seismic assessment of existing RC buildings before and after shear-wall retrofitting

Seismic fragility analysis of concrete encased frame‐reinforced concrete core tube hybrid structure based on quasi‐static cyclic test

Contact Info

Product

Resources

About