Seismic assessment and design of R/C bridges with irregular congiguration, including SSI effects

Kappos, Andreas J.; Manolis, George D.; Moschonas, Ioannis F.

doi:10.1016/s0141-0296(02)00068-8

Cited by 46 publications

(21 citation statements)

References 2 publications

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“…Based on that information, we selected the most common longitudinal schemes that conduct to the three typologies used in this work. Additionally, other authors [7,14,24] have also worked with similar substructure irregularities in other countries.…”

Section: Bridge Modelsmentioning

confidence: 99%

“…The effects of the lateral stiffness irregularity in continuous bridges have been also studied, with a proposal of the column stiffness required to improve the seismic response [25]. The influence of soil-structure interaction in the displacement and force demands of irregular bridges have been analyzed by Kappos [14], and the importance of the strength of pier cross sections in irregular bridges is discussed in [26]. In addition of the pier stiffness to characterize irregular bridges, the use of fragility curves is proposed by Akbari [2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Expected seismic performance of irregular medium-span simply supported bridges on soft and hard soils

Jara

Reynoso

Olmos

et al. 2015

Engineering Structures

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Section: Bridge Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Expected seismic performance of irregular medium-span simply supported bridges on soft and hard soils

Jara

Reynoso

Olmos

et al. 2015

Engineering Structures

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“…The most complex ones analyze simultaneously the superstructure, the foundation and the soil in the spirit of the direct method [4][5][6][7]. They make it possible to analyze the whole system, even in the non-linear range, furnishing results that are specific to single cases and not easily generalized.…”

Section: Introductionmentioning

confidence: 99%

“…The so-called substructure method, which consists of studying the soil-foundation system and superstructure separately on compliant-base (CB) subjected to the foundation input motion (FIM) [8][9][10][11][12][13][14][15][16][17], is a more practical approach since it may be applied using different modelling techniques for each subsystem. Making use of the superposition principle, this approach is naturally applied to the case of linear behaviour of soil, foundation and superstructure but is also widely adopted by using different levels of sophistication in the superstructure modelling.…”

Section: Introductionmentioning

confidence: 99%

Seismic soil-structure interaction in multi-span bridges: Application to a railway bridge

Carbonari

Dezi

Leoni

2011

Earthquake Engng. Struct. Dyn.

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The effects of soil-structure interaction on the seismic response of multi-span bridges are investigated by means of a modelling strategy based on the domain decomposition technique. First, the analysis methodology is presented: kinematic interaction analysis is performed in the frequency domain by means of a procedure accounting for radiation damping, soil-pile and pile-to-pile interaction; the seismic response of the superstructure is evaluated in the time domain by means of user-friendly finite element programs introducing suitable lumped parameter models take into account the frequency-dependent impedances of the soil-foundation system. Second, a real multi-span railway bridge longitudinally restrained at one abutment is analyzed. The input motion is represented by two sets of real accelerograms: one consistent with the Italian seismic code and the other constituted by five records characterized by different frequency contents. The seismic response of the compliant-base model is compared with that obtained from a fixed-base model. Pile stress resultants due to kinematic and inertial interactions are also evaluated. The application demonstrates the importance of performing a comprehensive analysis of the soil-foundation-structure system in the design process, in order to capture the effects of soil-structure interaction in each structural element that may be beneficial or detrimental. Copyright (C) 2011 John Wiley & Sons, Ltd

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“…For example, Kappos et al [16] found that there are advantages in including SSI effects in the seismic design of irregular R/C bridges as seismic forces are typically lower when SSI is included in the analysis. This conclusion nicely reinforces recommendation of NEHRP-94 seismic code, mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Time domain simulation of soil–foundation–structure interaction in non‐uniform soils

Jeremić

Jie²,

Preisig

et al. 2009

Earthq Engng Struct Dyn

119

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SUMMARYPresented here is a numerical investigation of the influence of non-uniform soil conditions on a prototype concrete bridge with three bents (four span) where soil beneath bridge bents are varied between stiff sands and soft clay. A series of high-fidelity models of the soil-foundation-structure system were developed and described in some details. Development of a series of high-fidelity models was required to properly simulate seismic wave propagation (frequency up to 10 Hz) through highly nonlinear, elastic plastic soil, piles and bridge structure. Eight specific cases representing combinations of different soil conditions beneath each of the bents are simulated. It is shown that variability of soil beneath bridge bents has significant influence on bridge system (soil-foundation-structure) seismic behavior. Results also indicate that free field motions differ quite a bit from what is observed (simulated) under at the base of the bridge columns indicating that use of free field motions as input for only structural models might not be appropriate. In addition to that, it is also shown that usually assumed beneficial effect of stiff soils underneath a structure (bridge) cannot be generalized and that such stiff soils do not necessarily help seismic performance of structures. Moreover, it is shown that dynamic characteristics of all three components of a triad made up of earthquake, soil and structure play crucial role in determining the seismic performance of the infrastructure (bridge) system.

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Seismic assessment and design of R/C bridges with irregular congiguration, including SSI effects

Cited by 46 publications

References 2 publications

Expected seismic performance of irregular medium-span simply supported bridges on soft and hard soils

Expected seismic performance of irregular medium-span simply supported bridges on soft and hard soils

Seismic soil-structure interaction in multi-span bridges: Application to a railway bridge

Time domain simulation of soil–foundation–structure interaction in non‐uniform soils

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