Seismic Performance of Steel Structure-Foundation Systems Designed According to Eurocode 8 Provisions: The Case of Near-Fault Seismic Motions

Katsimpini, Panagiota S.; Konstandakopoulou, Foteini; Papagiannopoulos, George A.; Pnevmatikos, Nikos; Hatzigeorgiou, George D.

doi:10.3390/buildings10040063

Cited by 5 publications

(6 citation statements)

References 13 publications

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“…It is recalled that Eurocode 8 [2], in its current version, does not provide a specific methodology for the analysis and design of steel building-foundation systems, considering or neglecting SSI, in regions where the potential seismic hazard from long duration seismic motions is high or even dominates. A similar deficiency in Eurocode 8 [2] has been pointed out by Katsimpini et al [29] for the case of near-fault seismic motions.…”

Section: Introductionsupporting

confidence: 58%

“…The results of this work are deemed to be realistic and can be viewed, even for comparison purposes, in conjunction with those obtained by Katsimpini et al [29] for the case of near-fault seismic motions. It is recalled that Eurocode 8 [2], in its current version, does not provide a specific methodology for the analysis and design of steel building-foundation systems, considering or neglecting SSI, in regions where the potential seismic hazard from long duration seismic motions is high or even dominates.…”

Section: Introductionsupporting

confidence: 54%

“…Alternatively, a computational model for low-cycle fatigue-calibrated to describe brace fracture-may directly be incorporated in the analysis of a steel building subjected to long duration motions [16,20]. Finally, even though it has been observed in [29], premature yielding of columns before yielding of the braces was not met in any of the analyses performed herein.…”

Section: Discussionmentioning

confidence: 99%

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The Effect of Long Duration Earthquakes on the Overall Seismic Behavior of Steel Structures Designed According to Eurocode 8 Provisions

et al. 2020

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Premature and simultaneous buckling of several steel braces in steel structures due to the prolonged duration of a seismic motion is one of the issues that must be addressed in the next version of Eurocode 8. In an effort to contribute towards the improvement of the seismic design provisions of Eurocode 8, an evaluation of the overall behavior of some steel building-foundation systems under the action of long duration seismic motions is performed herein by means of nonlinear time-history seismic analyses, taking into account soil–structure interaction (SSI) effects. In particular, the maximum seismic response results—in terms of permanent interstorey drifts, overturning moments and base shears of the steel buildings as well as of the permanent settlement and tilting of their foundations—are computed. It is found that the seismic performance of steel buildings when subjected to long duration seismic motions is: (i) acceptable for the two and five-storey fixed base steel buildings and for the two-storey steel buildings with SSI effects included; (ii) unacceptable for the eight-storey fixed base steel buildings and for the five and eight-storey steel buildings with SSI effects included. In all cases of steel buildings with SSI effects included, the seismic performance of the mat foundation, as expressed by the computed values of residual settlement and tilting, is always acceptable.

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Section: Introductionsupporting

confidence: 58%

Section: Introductionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

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The Effect of Long Duration Earthquakes on the Overall Seismic Behavior of Steel Structures Designed According to Eurocode 8 Provisions

et al. 2020

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“…In these models, the soil-structure interaction (SSI) effect is neglected. However, many studies have indicated that a system of the steel building-foundation should be taken into account, especially ones subjected to near-source earthquakes [18]. An input, the values of mass and stiffness of each floor are assumed to be the same, given as: m i = 0.0714 kNs 2 /mm and k i = 100 kN/mm.…”

Section: Description Of Case Study and Ground Motion Inputsmentioning

confidence: 99%

On the Influence of the Vertical Earthquake Component on Structural Responses of High-Rise Buildings Isolated with Double Friction Pendulum Bearings

2021

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The double friction pendulum (DFP) bearing is adapted from the well-known single friction pendulum (SFP) bearing. This type of bearings has been widely used for structural vibration controls. The main advantage of the DFP is its capacity to accommodate larger displacements as compared with the SFP one. This paper aims to assess the effect of the vertical earthquake component on the seismic behaviour of a base-isolated high-rise building. In this respect, the mathematical model of the building subjected to earthquake excitations with an implementation of a DFP bearing system is established. The model presented herein considers earthquake excitations in horizontal (X and Y) and vertical (Z) directions. A series model of two friction elements is presented for the bearing, where the friction load of the bearing surface is governed by a modified Bouc-Wen model, which is dependent on the sliding velocity and the contact pressure. The numerical results of an example of a base-isolated 9-story steel building subjected to near-source and far-field earthquakes show the high effectiveness of the bearing system in reduction of the seismic response of the building, especially in the near-source region, as well as exhibit considerable effectiveness of the vertical earthquake component on the bearing and structural behaviour.

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“…Ground motions can be divided into near-fault and far-fault ground motions, depending on the distance from the epicenter and the characteristics of each ground motion. Recent studies have analyzed the effects of near-fault ground motion on architectural and civil structures, such as nuclear power plants, dams, bridges, and buildings [11][12][13][14]. Near-fault ground motion generally shows strong and narrow-band pulses for a short period in spectral accelerations [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Evaluation of Bridges Considering Aspect Ratio of Pier in Near-Fault and Far-Fault Ground Motions

2020

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The recent increase in earthquake activities has highlighted the importance of predicting the seismic response of structures. Damage to civil infrastructure, particularly bridges, can cause considerable human and property losses. The seismic performance of a structure should be evaluated based on the characteristics of structures and earthquakes. For this, this study defined the two main factors of ground motion and structural system that affect the seismic response of a structure. Ground motions, which are mainly dependent on the distance from the epicenter, were defined as near-fault and far-fault ground motions. Near-fault ground motion includes the characteristics of forward directivity and fling step. In addition to ground motion, the aspect ratio of the pier, as a representative factor of a structural system, influences the seismic behavior of bridges. Thus, this study assessed the seismic response of bridges with various aspect ratios under the near-fault and far-fault ground motion conditions. Nonlinear static analysis was first performed to evaluate the seismic capacity of the pier. Then modal and dynamic analyses were carried out to examine the effects of the aspect ratio and ground motion on the displacement and force response and the change in the natural frequency of the bridge.

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Seismic Performance of Steel Structure-Foundation Systems Designed According to Eurocode 8 Provisions: The Case of Near-Fault Seismic Motions

Cited by 5 publications

References 13 publications

The Effect of Long Duration Earthquakes on the Overall Seismic Behavior of Steel Structures Designed According to Eurocode 8 Provisions

The Effect of Long Duration Earthquakes on the Overall Seismic Behavior of Steel Structures Designed According to Eurocode 8 Provisions

On the Influence of the Vertical Earthquake Component on Structural Responses of High-Rise Buildings Isolated with Double Friction Pendulum Bearings

Dynamic Response Evaluation of Bridges Considering Aspect Ratio of Pier in Near-Fault and Far-Fault Ground Motions

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