Implications of inter-storey-isolation (ISI) on seismic fragility, loss and resilience of buildings subjected to near fault ground motions

2021 ◽  
Author(s):  
Arijit Saha ◽  
Sudib Kumar Mishra
Keyword(s):  
Ground Motions ◽  
Seismic Fragility ◽  
Near Fault

Seismic fragility analysis of a CANDU type NPP containment building for near-fault ground motions

2006 ◽  
Vol 10 (2) ◽  
pp. 105-112 ◽  
Author(s):  
In-Kil Choi ◽  
Young-Sun Choun ◽  
Seong-Moon Ahn ◽  
Jeong-Moon Seo
Keyword(s):  
Ground Motions ◽  
Fragility Analysis ◽  
Seismic Fragility ◽  
Near Fault

scholarly journals Embankment Seismic Fragility Assessment under the Near-Fault Pulse-like Ground Motions by Applying the Response Surface Method

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Fa Che ◽  
Chao Yin ◽  
Jilei Zhou ◽  
Zhinan Hu ◽  
Xingkui Zhao ◽  
...  
Keyword(s):  
Response Surface ◽  
Response Surface Method ◽  
Principal Components ◽  
Structural Parameters ◽  
Fragility Curves ◽  
Ground Motions ◽  
Uniform Design ◽  
Seismic Fragility ◽  
Near Fault ◽  
Surface Method

Uncertainties of the ground motions and structural parameters are the main factors that limit the accuracy of embankment seismic fragility assessment. In response to the uncertainties of the ground motions, artificial synthesizing method of the near-fault pulse-like ground motions was proposed, and 15 ground motions with the rupture fault distances ranging from 1 to 15 km were synthesized by taking the Chi-Chi earthquake in Taiwan, China, as an example. The Xi’an-Baoji expressway K1125 + 470 embankment was taken as the research object, and a total of 12 structural parameters were selected as the design variables, namely, the elastic modulus, bulk modulus, shear modulus, density, cohesion force, and internal friction angle of the embankment fill and soil foundation, respectively. In response to the uncertainties of these parameters, 3 principal components with large impacts on the embankment seismic fragility were extracted based on the principal component analysis. Mapping relationships among the principal components and embankment seismic damages were analyzed using the uniform design response surface method, and the seismic fragility assessment was carried out and the fragility curves were plotted. The research results are consistent with the actual embankment seismic damage conditions of the Chi-Chi earthquake, indicating that the proposed method is scientific and reasonable. It also shows that it would obviously overestimate the seismic performance in the embankment seismic fragility assessment without considering the uncertainties of the ground motions and structural parameters.

Empirical models of bridge seismic fragility surface considering the vertical effect of near-fault ground motions

Structures ◽  
2021 ◽  
Vol 34 ◽  
pp. 2962-2973
Author(s):  
Yahui Shao ◽  
Yuanyuan Wei ◽  
Tao Yang ◽  
Ming Ni ◽  
Jian Zhong
Keyword(s):  
Ground Motions ◽  
Empirical Models ◽  
Seismic Fragility ◽  
Near Fault ◽  
Fragility Surface

Seismic fragility assessment of a multi-span RC bridge in Bangladesh considering near-fault, far-field and long duration ground motions

Structures ◽  
2019 ◽  
Vol 19 ◽  
pp. 333-348 ◽  
Author(s):  
Md Rashedul Kabir ◽  
A.H.M. Muntasir Billah ◽  
M. Shahria Alam
Keyword(s):  
Ground Motions ◽  
Seismic Fragility ◽  
Far Field ◽  
Near Fault ◽  
Long Duration

Effects of Fling Step and Forward Directivity on Seismic Response of Buildings

2006 ◽  
Vol 22 (2) ◽  
pp. 367-390 ◽  
Author(s):  
Erol Kalkan ◽  
Sashi K. Kunnath
Keyword(s):  
Seismic Response ◽  
Ground Motions ◽  
High Amplitude ◽  
Moment Frames ◽  
Steel Moment Frames ◽  
Damage Potential ◽  
Near Fault ◽  
Forward Directivity ◽  
Fling Step ◽  
Far Fault

This paper investigates the consequences of well-known characteristics of near-fault ground motions on the seismic response of steel moment frames. Additionally, idealized pulses are utilized in a separate study to gain further insight into the effects of high-amplitude pulses on structural demands. Simple input pulses were also synthesized to simulate artificial fling-step effects in ground motions originally having forward directivity. Findings from the study reveal that median maximum demands and the dispersion in the peak values were higher for near-fault records than far-fault motions. The arrival of the velocity pulse in a near-fault record causes the structure to dissipate considerable input energy in relatively few plastic cycles, whereas cumulative effects from increased cyclic demands are more pronounced in far-fault records. For pulse-type input, the maximum demand is a function of the ratio of the pulse period to the fundamental period of the structure. Records with fling effects were found to excite systems primarily in their fundamental mode while waveforms with forward directivity in the absence of fling caused higher modes to be activated. It is concluded that the acceleration and velocity spectra, when examined collectively, can be utilized to reasonably assess the damage potential of near-fault records.

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