Soil‐Structure Interaction Effect on Fragility Curve of 3D Models of Concrete Moment‐Resisting Buildings

Anvarsamarin, Ali; Rofooei, Fayaz R.; Nekooei, Masoud

doi:10.1155/2018/7270137

Cited by 9 publications

(7 citation statements)

References 28 publications

(34 reference statements)

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“…Detrimental effects of SSI considering different soil a b Fig. 17 Seismic response of pipelines in terms of a PGA versus strain (ε), b PFA versus strain strain (ε) and c PGA versus PFA in decoupled case without SSI (ε y is the yield strain of the material) a b modelling for RC buildings have also been observed in Karapetrou et al (2015) and Anvarsamarin et al (2018). When it comes to CC (Fig.…”

Section: Structural Componentsmentioning

confidence: 94%

On the seismic fragility of pipe rack—piping systems considering soil–structure interaction

Sarno

Karagiannakis

2020

Bull Earthquake Eng

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Piping systems constitute the most vulnerable component in down-and mid-stream facilities posing immediate threat to human lives, communities financial robustness and environment. Pipe racks present several mechanical and geometrical idiosyncrasies compared to common buildings and the seismic response is governed by the pipework layout. Important design requirements e.g. dynamic interaction between pipelines and supporting structure are commonly overlooked during pipe racks design process and uncertainties relevant to modelling of soil or seismic input are not quantified. In the present work, after reviewing the technical literature and codes, a 3D RC rack was used as a testbed and analysed as coupled and decoupled with a non-seismic code conforming piping system accounting for soil-structure interaction. Incremental dynamic analysis was adopted as an assessment methodology for deriving fragility curves considering ground motions in near-and far-field conditions. It was deduced that the modelling (boundary conditions of pipes) was the most considerable uncertainty since it increased the probability of collapse limit state of structural members from 0 to 59%. It was also demonstrated that soil deformability as well as source conditions altered considerably the dispersion of intensity measure conditional on engineering demand parameter of structural and nonstructural members. The results may be another indication that code provisions should be more normative regarding industrial pipe racks.

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Section: Structural Componentsmentioning

confidence: 94%

On the seismic fragility of pipe rack—piping systems considering soil–structure interaction

Sarno

Karagiannakis

2020

Bull Earthquake Eng

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“…As an extensive application, two more different earthquakes including the Cape Mendocino (magnitude 7.1, April 1992) and Landers (magnitude 7.4, June 1992) earthquake are considered. The horizontal components of the earthquakes (CAPEMEND/ RIO360 and LANDERS/YER270) (Anvarsamarin et al, 2018) are taken as the input for the parametric optimization. The sampling rate for these earthquakes is also 0.02 s. The total time is 36 and 44 s for Cape Mendocino and Landers earthquakes, respectively.…”

Section: Seismic Mitigation Case Studiesmentioning

confidence: 99%

Nonlinear dynamic analysis of the bridge bearing and genetic algorithm–based optimization for seismic mitigation

Liang

Cheng

Liu

et al. 2020

Advances in Structural Engineering

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Seismic mitigation for bridges by the specific bearing with highly elastoplastic dissipaters is very important to ensure safety of superstructures exposed to earthquakes. To study the lateral vibration of the bridge bearing, a nonlinear dynamic model is developed while thoroughly considering highly nonlinear mechanical properties of the bearing in this article. The generalized- α method is specifically adapted to solve the nonlinear equations. Moreover, nonlinear behavior of the bearing is fully incorporated through direct path-following of the practical experimental hysteresis curve. The proposed method is validated through careful comparison between the dynamic simulation and the quasi-static experimental results. Mechanical responses of the bridge-pier system under earthquake excitations can be calculated in a more reliable manner. On this basis, a parametric optimization model involving several key parameters of the bearing-pier system is developed. The optimization problem is solved by the genetic algorithm as the searching tool. Numerical examples show that mechanical responses of the bridge-pier system subjected to the earthquake excitations can be effectively mitigated after parametric optimization. The extensive applicability of the proposed method is validated through finding the optimized parameters for the bearing when multiple different earthquakes are considered. Moreover, the accumulative energy absorption of the bearing is also considered to enhance the seismic performance of the bearing. This work provides a reliable way of dynamic performance prediction and seismic mitigation study of nonlinear bridge bearing under earthquake excitations given any complex experimental hysteresis curve.

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“…Moon, et al [12] employed a fragility approach to investigate the effect of plan structural irregularity and confirmed that the more irregular the structures, the higher the risk they pose. Meanwhile, the effect of the soilstructure interaction on the fragility curves was investigated by Anvarsamarin, et al [13] with the finding that adopting the average spectral acceleration (S a.avg ) intensity measure is more efficient in capturing the effect of the inherent uncertainties of strong ground motions on the structural response parameters.…”

Section: Introductionmentioning

confidence: 99%

Collapse Risks of Fail-Safe RC Frames Due to Earthquakes: Fragility Assessments

Mangkoesoebroto

Prayoga²,

Parithusta³

2019

J. Eng. Technol. Sci.

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The objective of this study was to determine the collapse risk of failsafe reinforced concrete (RC) frames due to earthquakes by newly developed fragility curves. The curves were constructed based on the collapse mechanism, instead of measures of lateral drift as customarily adopted. The procedure was applied to RC open frames that were seismic resistant. A fail-safe mechanism was imposed by allowing plastic hinges to be formed mainly in the beams. This automatically satisfied the stronger column-weaker beam requirement; shear failure was neither tolerated anywhere in the columns nor in the beams. Two kinds of fail-safe RC frames were investigated: special moment resisting frames (SMF) and ordinary moment resisting frames (OMF). Their earthquake collapse risk was computed and compared. Inelastic time history (NLTH) and the nonlinear static procedure (NSP) were conducted to assess their structural performance. The results showed among others that the fail-safe OMF had lower collapse risk than the fail-safe SMF. The collapse prevention performance level in NLTH could only be achieved for the fail-safe frames. The non-linear time history analysis should be the only method used for seismic reevaluation/safety checking of building frame structures.

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Soil‐Structure Interaction Effect on Fragility Curve of 3D Models of Concrete Moment‐Resisting Buildings

Cited by 9 publications

References 28 publications

On the seismic fragility of pipe rack—piping systems considering soil–structure interaction

On the seismic fragility of pipe rack—piping systems considering soil–structure interaction

Nonlinear dynamic analysis of the bridge bearing and genetic algorithm–based optimization for seismic mitigation

Collapse Risks of Fail-Safe RC Frames Due to Earthquakes: Fragility Assessments

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