Dynamic stiffness of monumental flexible masonry foundations

Pitilakis, Dimitris; Καρατζέτζου, Άννα

doi:10.1007/s10518-014-9611-3

Cited by 27 publications

(117 citation statements)

References 23 publications

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“…As usually suggested in the literature for shallow foundations (e.g. Elsabee and Morray 1977;Kim and Stewart 2003;Conti et al 2017), in this case the kinematic interaction can be neglected, being the stiffness of masonry foundations comparable to that of the surrounding soil (Pitilakis and Karatzetzou 2015) and the embedment of load-bearing walls relatively low. Consequently, SSI analysis was reduced to the inertial mechanisms only.…”

Section: Setting Of Foundation Impedance Functionsmentioning

confidence: 93%

Numerical simulation of the seismic response and soil–structure interaction for a monitored masonry school building damaged by the 2016 Central Italy earthquake

Brunelli

Silva

Piro

et al. 2020

Bull Earthquake Eng

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Despite significant research advances on the seismic response analysis, there is still an urgent need for validation of numerical simulation methods for prediction of earthquake response and damage. In this respect, seismic monitoring networks and proper modelling can further support validation studies, allowing more realistic simulations of what earthquakes can produce. This paper discusses the seismic response of the “Pietro Capuzi” school in Visso, a village located in the Marche region (Italy) that was severely damaged by the 2016–2017 Central Italy earthquake sequence. The school was a two-story masonry structure founded on simple enlargements of its load-bearing walls, partially embedded in the alluvial loose soils of the Nera river. The structure was monitored as a strategic building by the Italian Seismic Observatory of Structures (OSS), which provided acceleration records under both ambient noise and the three mainshocks of the seismic sequence. The evolution of the damage pattern following each one of the three mainshocks was provided by on-site survey integrated by OSS data. Data on the dynamic soil properties was available from the seismic microzonation study of the Visso village and proved useful in the development of a reliable geotechnical model of the subsoil. The equivalent frame (EF) approach was adopted to simulate the nonlinear response of the school building through both fixed-base and compliant-base models, to assess the likely influence of soil–structure interaction on the building performance. The ambient noise records allowed for an accurate calibration of the soil–structure model. The seismic response of the masonry building to the whole sequence of the three mainshocks was then simulated by nonlinear time history analyses by using the horizontal accelerations recorded at the underground floor as input motions. Numerical results are validated against the evidence on structural response in terms of both incremental damage and global shear force–displacement relationships. The comparisons are satisfactory, corroborating the reliability of the compliant-base approach as applied to the EF model and its computational efficiency to simulate the soil–foundation–structure interaction in the case of masonry buildings.

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Section: Setting Of Foundation Impedance Functionsmentioning

confidence: 93%

Numerical simulation of the seismic response and soil–structure interaction for a monitored masonry school building damaged by the 2016 Central Italy earthquake

Brunelli

Silva

Piro

et al. 2020

Bull Earthquake Eng

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“…As aforementioned, when structures are founded on soft soil layers then soil-structure interaction plays an important role in their dynamic behavior, which has been presented among other structural systems also for masonry buildings (e.g., Karatzetzou et al, 2015;Pitilakis and Karatzetzou, 2015). During an earthquake the ground deforms and this affects the foundation and the supported structure, while the presence of a structure substantially alters the ground response compared to free-field conditions.…”

Section: Soil-structure Interactionmentioning

confidence: 99%

Impact of Soil Saturation Level on the Dynamic Response of Masonry Buildings

Liratzakis

Tsompanakis

2018

Front. Built Environ.

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The present study investigates the impact of the soil saturation level on the performance of unreinforced masonry (URM) buildings when subjected to seismic excitations. More specifically, this paper examines the dynamic response of an ordinary stone-built URM building, firstly in its initial state and subsequently when it is slightly retrofitted with reinforced concrete beams at the perimeter in both storeys and also reinforced concrete instead of wooden lintels above the openings. The assessment of the behavior of this typical URM building, taking into account the soil-structure interaction (SSI) along with the nonlinear behavior both of the soil and the structure is examined through incremental dynamic analyses. For this purpose, a compatible in terms of soil conditions, set of 20 ground motions was selected, each scaled to several levels of seismic intensity. Subsequently, multiple nonlinear dynamic analyses of the coupled model of soil and structure were performed. In addition, these calculations were repeated for eight different saturation levels covering a wide range of soil conditions to elaborately investigate the problem at hand.

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“…In some of the studies, soil spring coefficients were used for modeling the SSI of structures. Casolo et al, Pitilakis and Karatz etzou, de Silva et al, and Camata et al studied the structural behavior of a 19‐m‐high historical bell tower under static and dynamic loads by taking into account the SSI. They concluded that, the SSI played a significant role on the tower's structural behavior despite the linear modelling of the soil media.…”

Section: Introductionmentioning

confidence: 99%

Effect of soil properties on the seismic damage assessment of historical masonry minaret–soil interaction systems

Hökelekli

Al-Helwani

2019

Structural Design Tall Build

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The interaction between soil and structure plays a crucial role on accurate determination of structures' seismic behavior. The assumption of fixed base structure has been commonly used in traditional design works, and the interaction between soil and structure is thus often neglected. In addition, historical masonry structures particularly built on elastic soil media may be significantly affected seismic behavior of the structure under earthquakes. In this research, the damage distribution on a historical masonry minaret is numerically investigated under horizontal earthquake ground motion. AlacaMosque minaret was built in 1271 in Bolvadin district of Afyon province. The historical masonry minaret was chosen as the subject of the study. Nonlinear seismic time history analyses were conducted for fixed-based and different soil properties under horizontal earthquake ground motion. The horizontal (East-West) component acceleration records of Dinar earthquake (Mw = 6.1) that took place on October 10, 1995, were used during the analyses. Maximum displacement, maximum/minimum principal stresses, and damage ratios were determined by nonlinear analyses performed considering fixed base and soil-structure interaction. The analysis results showed that soil-structure interaction had significant effect on the structural behavior of the minaret, such that, the minaret that was expected to get damage in the case of fixed base did not get any damage when soil-structure interaction was considered. KEYWORDS damage plasticity, earthquake ground motion, masonry minarets, nonlinear seismic behavior, soilstructure interaction

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Dynamic stiffness of monumental flexible masonry foundations

Cited by 27 publications

References 23 publications

Numerical simulation of the seismic response and soil–structure interaction for a monitored masonry school building damaged by the 2016 Central Italy earthquake

Numerical simulation of the seismic response and soil–structure interaction for a monitored masonry school building damaged by the 2016 Central Italy earthquake

Impact of Soil Saturation Level on the Dynamic Response of Masonry Buildings

Effect of soil properties on the seismic damage assessment of historical masonry minaret–soil interaction systems

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