Improved seismic intensity measures and regional structural risk estimation models

Li, Si-Qi

doi:10.1016/j.soildyn.2023.108256

Soil Dynamics and Earthquake Engineering

2024

DOI: 10.1016/j.soildyn.2023.108256

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Improved seismic intensity measures and regional structural risk estimation models

Si-Qi Li

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2024

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Cited by 32 publications

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“…A series of zonal fragility prediction models of six typical regional structure groups is established. Li (9,10) highlighted the importance of measuring seismic intensity to evaluate and predict seismic risk and vulnerability of structures, proposing an improved equation for instrumental intensity. The innovation introduced consists of an improved model compared to traditional techniques for assessing the seismic risk of regional structures.…”

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Stone Architecture in Abruzzo: Seismic Risk Analysis of Bell Tower of the Church of San Lorenzo in San Buono

Marchione

2024

IJE

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The church of San Lorenzo in San Buono (Italy) is unique in the local landscape due to its technical, and architectural features. The building, whose construction dates from the 14th century to the mid-20th century, was realized by the most important designers in the region. The bell tower is an element characterized by refined neoclassicism and testifies to a remarkable episode of the permanence of the neoclassical style in Abruzzo until the first decades of the 20th century.The present study illustrates both a technological-constructive analysis of the building and an assessment of the seismic risk of the bell tower, to present an important point for the knowledge of the artefact with regard to possible conservative restoration works. The seismic risk analyses are carried out for two different structural configurations and two different typologies allowed by the Italian building codes for monumental masonry buildings: simplified linear and non-linear static. The study illustrates how the presence of the adjacent structure significantly alters the structural behavior of the masonry tower, both in terms of displacement and propagation of the crack pattern. The differences in the results of the non-linear calculation and the expeditious methods suggested by the standard are highlighted as well.

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Stone Architecture in Abruzzo: Seismic Risk Analysis of Bell Tower of the Church of San Lorenzo in San Buono

Marchione

2024

IJE

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The influence of torsion on acceleration demands in low-rise RC buildings

Ruggieri,

Vukobratović

2024

Bull Earthquake Eng

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This paper presents a study of acceleration demands in low-rise reinforced concrete (RC) buildings with torsion, evaluated by quantifying peak floor accelerations (PFAs) and floor response (acceleration) spectra (FRS). The study was performed with the aim to provide simple empirical formulas to quantify the amplification effects due to torsion, which can occur in most of the existing and new RC buildings. With this goal in mind, a set of eight archetype buildings was selected, characterized by an increasing floor eccentricity obtained by moving the centre of rigidity (CR) away from the centre of mass (CM). Numerical models of the proposed set of archetype RC buildings were considered in both linear elastic and nonlinear configurations. For the latter, the properties of models were widely varied, by systematically modifying parameters of plastic hinges, in order to obtain a sample of 1000 models. Non-structural components (NSCs) were considered linear elastic in all cases. To investigate acceleration demands, a set of forty Eurocode 8 spectrum-compatible ground motion records were used as input. For linear elastic building models, it was observed that the change of demands depends on the position of the NSC (in-plan and in-height), and on the distance between CR and CM. On the other hand, for nonlinear models, additional parameters must be considered, such as the building ductility (μ) and yielding force (Vy). New regression models were proposed for quantifying the observed differences in PFAs and FRS when torsion occurs. The efficiency of the proposed models was assessed by testing the new formulas on an existing case study building, as well as on the well-known SPEAR building.

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Seismic hazard models for typical urban masonry structures considering optimized regression algorithms

Li,

Han

et al. 2024

Bull Earthquake Eng

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Improved seismic intensity measures and regional structural risk estimation models

Cited by 32 publications

References 50 publications

Stone Architecture in Abruzzo: Seismic Risk Analysis of Bell Tower of the Church of San Lorenzo in San Buono

Stone Architecture in Abruzzo: Seismic Risk Analysis of Bell Tower of the Church of San Lorenzo in San Buono

The influence of torsion on acceleration demands in low-rise RC buildings

Seismic hazard models for typical urban masonry structures considering optimized regression algorithms

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