Seismic fragility functions for code compliant and non-compliant RC SMRF structures in Pakistan

2018 ◽  
Vol 16 (10) ◽  
pp. 4675-4703 ◽  
Author(s):  
Naveed Ahmad ◽  
Asif Shahzad ◽  
Qaisar Ali ◽  
Muhammad Rizwan ◽  
Akhtar Naeem Khan
Keyword(s):  
Seismic Fragility ◽  
Fragility Functions

Analytical Seismic Fragility Functions for Dual RC Structures in Bucharest

2016 ◽  
pp. 463-479 ◽  
Author(s):  
Paul Olteanu ◽  
Veronica Coliba ◽  
Radu Vacareanu ◽  
Florin Pavel ◽  
Daniel Ciuiu
Keyword(s):  
Seismic Fragility ◽  
Fragility Functions ◽  
Rc Structures

Analysis of Seismic Fragility Functions of Highway Embankments

2020 ◽  
Author(s):  
Balázs Hübner ◽  
András Mahler
Keyword(s):  
Finite Element ◽  
Earthquake Engineering ◽  
Seismic Fragility ◽  
Response Analysis ◽  
Fragility Functions ◽  
Ground Response ◽  
Ground Response Analysis ◽  
Fragility Function ◽  
Damage States ◽  
Log Normal

Vulnerability assessment of structures is a vitally important topic among earthquake engineering researchers. Generally, their primary focus is on the seismic performance of buildings. Less attention is paid to geotechnical structures, even though information about the performance of these structures (e.g. road embankments, levees, cuts) during an earthquake is essential for planning remediation and rescue efforts after disasters. In this paper the seismic fragility functions of a highway embankment are defined following an analytical methodolgy. The technique is a displacement-based evaluation of seismic vulnerability. Displacements of an embankment during a seismic event are approximated by a 2-D nonlinear ground response analysis using the finite element method. The numerical model was calibrated based on the results of a 1-D nonlinear ground response analysis. The expected displacements were calculated for 3 different embankment heights and Peak Ground Acceleration (PGA) values between 0,05 and 0,35g. Based on the results of the 2-D finite element analysis, the relationship between displacements and different seismic intensity measures (PGA, Arias-intensity) was investigated. Different damage states were considered, and the probability of their exceedance was investigated. The seismic fragility functions of the embankments were developed based on probability of exceedance of these different damage states based on a log-normal fragility function. The legitimacy of using a log-normal fragility function is also examined.

Efficient seismic fragility functions through sequential selection

2020 ◽  
Vol 87 ◽  
pp. 101977 ◽  
Author(s):  
Francisco Peña ◽  
Ilias Bilionis ◽  
Shirley J. Dyke ◽  
Yenan Cao ◽  
George P. Mavroeidis
Keyword(s):  
Seismic Fragility ◽  
Fragility Functions ◽  
Sequential Selection

Seismic Fragility Functions for Sewerage Pipelines

2015 ◽  
Author(s):  
M. Liu ◽  
S. Giovinazzi ◽  
P. Lee
Keyword(s):  
Seismic Fragility ◽  
Fragility Functions

Seismic fragility assessment of ductile reinforced concrete building frames

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Nibas Apu ◽  
Ravi Sinha
Keyword(s):  
Reinforced Concrete ◽  
Building Codes ◽  
Nonlinear Time History Analysis ◽  
Seismic Fragility ◽  
Fragility Functions ◽  
Limit States ◽  
Content Type ◽  
Rc Frames ◽  
Time Period ◽  
Seismic Force

Purpose Increasing awareness of the society and complying with design requirements of building codes for seismic safety of structures and inhabitants during severe earthquakes are the primary purpose of seismic analysis. This study aims to present the variability in seismic fragility functions for frames of different heights for the most vulnerable condition of structure using nonlinear time history analysis. Design/methodology/approach A total of 4, 8 and 20 stories reinforced concrete (RC) moment-resisting two-dimensional frames are considered for this study. Ground motions (GM) are selected as per the conditional mean spectrum and these are conditioned on a target spectral acceleration at the concern time period. RC frames are designed and detailed as per Indian standards. A concentrated plasticity approach is adopted for non-linear analytical modeling of the RC frames. Deterministic capacity limit states in terms of maximum inter-story drift ratio are considered for different damage states. Fragility functions have been derived following a lognormal distribution from incremental dynamic analysis curves. Finally, the maximum likelihood estimation of the response is obtained for fitting curves with observed fragility. Findings The fragility functions of the three structures reflect that under critical or extreme conditions of GM the taller buildings have higher fragility than the shorter buildings for each level of limit states even though both are designed to meet their code-level design forces. Research limitations/implications The study is conducted on the extreme scenario of GM conditioned on the fundamental time period of each building, whereas comparison can be developed by selecting various methodologies of GM set. The probabilistic capacity model can be developed for future studies to check the fragility variation with deterministic and probabilistic capacity. Originality/value The investigation endeavors to present a comprehensive fragility assessment framework by analytical method. The outcome will be useful in the development of a disaster management strategy for new or old buildings and the response of seismic force with a variation of the building’s height. The findings will also be useful for updating the earthquake-resistant building codes for the new building construction in a similar context.

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