Seismically isolated bridge piers on shallow soil stratum with soil–structure interaction

Vlassis, A.G.; Spyrakos, Constantine C.

doi:10.1016/s0045-7949(01)00105-5

Cited by 51 publications

(22 citation statements)

References 9 publications

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“…In particular, past earthquakes all over the world have proved the benefits of isolation technique for pier protection. These effects can be strongly modified by soil deformability and energy dissipation in the ground, as shown in Vlassis and Spyrakos [33], Tongaonkar and Jangid [31], Ucak and Tsopelas [32], and Forcellini [15].…”

Section: Introductionmentioning

confidence: 99%

“…These effects can be strongly modified by soil deformability and energy dissipation in the ground, as shown in Vlassis and Spyrakos [33], Tongaonkar and Jangid [31], Ucak and Tsopelas [32], and Forcellini [14]. In the paper, SR has been assessed by considering the effects of a set of motions by considering the soil-structure interaction (SSI) on several isolated bridge configurations.…”

Section: Introductionmentioning

confidence: 99%

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Seismic resilience of isolated bridge configurations with soil–structure interaction

Forcellini

2017

Innov. Infrastruct. Solut.

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Assessment of failure probabilities is one of the key points to define the seismic resilience (SR) of systems. Evaluation of the most proper countermeasure-such as retrofitting, recovery, or reconstruction-to return to the original functionality is a crucial issue, which has to deal with economic limitations. In this regard, bridges are fundamental for the network serviceability and communities' functionality during earthquakes, and in case of emergencies, their accessibility must be guaranteed. In this background, the paper aims at evaluating SR of a benchmark bridge improving its performance by means of isolation technique. It is based on the application of a performancebased earthquake engineering methodology, by the Pacific Earthquake Engineering Research center. Isolation technique contribution is assessed in terms of costs and time quantities with peak ground velocity levels. These outcomes have been applied to estimate the SR of the bridge and thus proposing an attempt of application to a real case study. Recovery costs and time have been implemented inside the traditional definition of resilience and its calculation has been used to assess different scenarios. The paper can be considered as a reference to evaluate recovery procedures by assessing economic performances. Such approach is fundamental for decision makers, stakeholders, professional engineers, and consultants as well.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic resilience of isolated bridge configurations with soil–structure interaction

Forcellini

2017

Innov. Infrastruct. Solut.

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“…Shallow spread footings are generally designed as foundations at such sites. Research in the past (Somaini 1984;Spyrakos 1990;Ciampoli and Pinto 1995;Saadeghvaziri, Yazdani-Motlagh, and Rashidi 2000;Vlassis and Spyrakos 2001;Raheem, Hayashikawa, and Hashimoto 2003) have investigated the behaviour of such shallow foundations supported bridge system under seismic excitation by treating the supporting soil/rock as a homogeneous medium and assuming a linear elastic behaviour of the pier column and the superstructure elements. Other parametric studies (De Carlo, Dolce, and Liberatore 2000) included a wide range of properties for the soil/rock-foundation system and the pier columns in order to 'generalize' the effect of SSI on such structures.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil-foundation-structure interaction and pier column non-linearity on seismic response of bridges supported on shallow foundations

Chaudhary

2016

Australian Journal of Structural Engineering

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Traditionally, shallow spread footing-type foundations are used for medium span bridges supported on hard soil and rock strata. Such bridges are modelled with fixed supports and no soil-foundation-structure interaction (SSI) is normally considered. The investigation presented herein utilized a sub-structuring technique and finite element method (FEM) model for the analysis of a four-span bridge designed for five different rock classes and subjected to an ensemble of actual ground motions. SSI was incorporated through Winkler springs while nonlinear behaviour of reinforced concrete pier column was modelled by an equivalent linear model. The results of the study were evaluated to delineate the effect of SSI and pier column non-linearity on seismic response parameters of bridges founded on rock. It was found that the soil-foundation-structure interaction couldn't be neglected in all cases of rock classes and input ground motions. Furthermore, pier column non-linearity influenced bridge displacement and base shear more significantly than SSI. Impact of foundation rocking was also examined and was found to be rather insignificant on bridge response parameters due to high rocking impedance of properly designed bridge foundations.

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“…Numerous authors considered also the SSI effects in the studies related to bridges (Grange et al 2011;Chaudhary et al 2001;Vlassis and Spyrakos 2001;Spyrakos and Vlassis 2002;Sarrazin et al 2005;Soneji and Jangid 2008). Moreover, the use of energy concepts in the analysis of structures subjected to earthquake motions in the time domain and frequency domain was also investigated in several studies (see, Austin and Lin 2004;Takewaki and Fujita 2009;Yamamoto et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Earthquake-induced pounding between equal height multi-storey buildings considering soil-structure interaction

Mahmoud

Abd-Elhamed

Jankowski

2013

Bull Earthquake Eng

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The present paper investigates the coupled effect of the supporting soil flexibility and pounding between neighbouring, insufficiently separated equal height buildings under earthquake excitation. Two adjacent three-storey structures, modelled as inelastic lumped mass systems with different structural characteristics, have been considered in the study. The models have been excited using a suit of ground motions with different peak ground accelerations and recorded at different soil types. A nonlinear viscoelastic pounding force model has been employed in order to effectively capture impact forces during collisions. Spring-dashpot elements have been incorporated to simulate the horizontal and rotational movements of the supporting soil. The results of the numerical simulations, in the form of the structural nonlinear responses as well as the time-histories of energy dissipated during pounding-involved vibrations, are presented in the paper. In addition, the variation in storeys peak responses and peak dissipated energies for different gap sizes are also shown and comparisons are made with the results obtained for colliding buildings with fixed-base supports. Observations regarding the incorporation of the soil-structure interaction and its effect on the responses obtained are discussed. The results of the study indicate that the soil-structure interaction significantly influences the pounding-involved responses of equal height buildings during earthquakes, especially the response of the lighter and more flexible structure. It has been found that the soil flexibility decreases storey peak displacements, peak impact forces

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Seismically isolated bridge piers on shallow soil stratum with soil–structure interaction

Cited by 51 publications

References 9 publications

Seismic resilience of isolated bridge configurations with soil–structure interaction

Seismic resilience of isolated bridge configurations with soil–structure interaction

Effect of soil-foundation-structure interaction and pier column non-linearity on seismic response of bridges supported on shallow foundations

Earthquake-induced pounding between equal height multi-storey buildings considering soil-structure interaction

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