Optimal seismic performance-based design of reinforced concrete buildings using nonlinear pushover analysis

Zou, Xiaokang; Chan, Chun Man

doi:10.1016/j.engstruct.2005.04.001

“…The top displacement of the MDOF system is a good indicator of the global deformation of the buildings subjected to earthquake loading. The top displacement is often taken as the global seismic demand in performance based design Kreslin and Fajfar, 2012;Fajfar, 1999Fajfar, , 2000Fajfar, , 2002Ghobarah, 2001;Zou and Chan, 2005;Gencturk and Elnashai, 2008 . However, the top displacement can not reveal the global damage degree of the buildings subjected to severe ground motions.…”

Section: Definition Of Performance and Hazard Levelsmentioning

confidence: 99%

“…The simplified nonlinear analysis methods are based on pushover analysis to determine structural capacity diagram and on design response spectra to represent demand diagram. The N2 method Fajfar, 1999Fajfar, , 2000Fajfar, , 2002Kreslin and Fajfar, 2012 and capacity spectrum method Freeman, 1998;Zou and Chan, 2005;Gencturk and Elnashai, 2008 are typical simplified nonlinear analysis methods. The N2 method has been implemented in Eurocode 8 European Committee for Standardization, 2004 .…”

Section: Introductionmentioning

confidence: 99%

Three-level performance-based optimization method of steel frames

Liu

¹

2018

Lat. Am. j. solids struct.

0

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This paper describes a three-level performance-based optimization model and an estimate method of residual top displacement for steel frames at three earthquake levels. The steel frames are supposed to be elastic at frequent earthquake, inelastic and hardening at occasional and rare earthquakes, respectively. The estimate formula is derived and estimate procedure is given in detail. The estimate method only needs to use only one pushover analysis until steel frames yield. The yield point is obtained automatically in the proposed method. The estimate method is able to make optimization process uninterrupted. Optimal design of a 3-story 2-bay steel frame is demonstrated to validate the proposed method.

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“…In the newly developed performance-based seismic design, NP analysis is one of the useful methods for determining the patterns and levels of damage for assessing a structure's inelastic behavior [20]. NP analysis uses lateral external static forces at floor levels, in combination with inelastic response spectra [21], [22].…”

Section: Fragility Curvesmentioning

confidence: 99%

Seismic Fragility Curves for 1 and 2 Stories R/C Buildings

Tekin

¹

,

Gürbüz

²

2015

IJET

1

0

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Abstract-In this study, the fragility curves were formed for 1 and 2 stories reinforced concrete (RC) residential buildings. The information regarding the structures was taken from projects of the buildings. Nonlinear pushover (NP) analyze was performed to 84 RC buildings which were divided to 2 groups. The buildings built 1998 and later were called Group-A. The building built before 1998 was called Group B. As for nonlinear analysis, a 3D computer model was drawn for each building and nonlinear analyses were applied to these models. Each building was analysed for 2 dimensions (X and Y). Totally 168 NP analysis were performed for each building. 4 damage limits (slight, moderate, heavy and complete) and 5 damage zones (undamaged, slight, medium, extensive and collapse) were determined according to maximum interstorey drift ratio. Fragility curve parameters were obtained at the result of the NP analysis. Probability density functions were calculated with the help of lognormal mean and lognormal standard deviation values of limit states. The fragility curves were generalized for the buildings in Group A and Group B. At the conclusion of this work; 8 fragility curves obtained for 1 and 2 stories reinforced concrete buildings in. Using these 8 curves; damage possibility can be estimated for RC buildings which have same features.

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“…Generally, the first mode response of the structures is considered in NP analysis [23]. In case, fundamental mode of vibration is the predominant response of structures [20]. There is a relatively good statistical correlation observed between the earthquake-induced displacement and the extent of structural damage contributed [24, [12].…”

Section: Fragility Curvesmentioning

confidence: 99%

Seismic Fragility Curves for 1 and 2 Stories R/C Buildings

TEKİN¹,

GURBUZ²

2015

International Journal of Engineering Technologies IJET

2

0

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Abstract-In this study, the fragility curves were formed for 1 and 2 stories reinforced concrete (RC) residential buildings. The information regarding the structures was taken from projects of the buildings. Nonlinear pushover (NP) analyze was performed to 84 RC buildings which were divided to 2 groups. The buildings built 1998 and later were called Group-A. The building built before 1998 was called Group B. As for nonlinear analysis, a 3D computer model was drawn for each building and nonlinear analyses were applied to these models. Each building was analysed for 2 dimensions (X and Y). Totally 168 NP analysis were performed for each building. 4 damage limits (slight, moderate, heavy and complete) and 5 damage zones (undamaged, slight, medium, extensive and collapse) were determined according to maximum interstorey drift ratio. Fragility curve parameters were obtained at the result of the NP analysis. Probability density functions were calculated with the help of lognormal mean and lognormal standard deviation values of limit states. The fragility curves were generalized for the buildings in Group A and Group B. At the conclusion of this work; 8 fragility curves obtained for 1 and 2 stories reinforced concrete buildings in. Using these 8 curves; damage possibility can be estimated for RC buildings which have same features.

show abstract

Optimal seismic performance-based design of reinforced concrete buildings using nonlinear pushover analysis

Cited by 88 publications

References 10 publications

Three-level performance-based optimization method of steel frames

Three-level performance-based optimization method of steel frames

Seismic Fragility Curves for 1 and 2 Stories R/C Buildings

Seismic Fragility Curves for 1 and 2 Stories R/C Buildings

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