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Simplified Seismic Analysis of Complex Civil Structures

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Civil Engineering".

Deadline for manuscript submissions: closed (30 April 2025) | Viewed by 1189

Special Issue Editors


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Guest Editor
Department of Innovation Engineering, University of Salento, 73100 Lecce, Italy
Interests: non-linear dynamic analysis; seismic vulnerability assessment; non-structural components; structural degradation evolution; advanced numerical modelling; fragility functions; infilled RC frames

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Guest Editor
Department of Civil, Environmental, Land, Construction and Chemistry, Politecnico di Bari, 70125 Bari, Italy
Interests: structural dynamics; time-history analysis; finite element modeling; finite element analysis; fragility analysis; masonry buildings; RC buildings; RC bridges
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The seismic response of civil structures has been widely investigated over recent decades through advanced experimental testing and numerical models. Additionally, the rapid progress of technology has enabled the accurate evaluation of the seismic behavior of complex structural systems, accounting for both local and global damage mechanisms.

Different approaches can be employed with the aim of capturing specific features of complex structural models. However, simplified approaches allow us to reduce the substantial effort required for modeling and analysis while ensuring a balance between accuracy and computational complexity.

This Special Issue seeks to promote the exchange of ideas in recent advancements in simplified approaches, simulating the peculiarities of complex structural systems. Particularly, contributions introducing new simplified methodologies are encouraged, covering all phases of the design and assessment processes, such as the definition of geometrical and structural features, modeling assumptions, seismic and structural behavior analysis, and verification methods.

The main topics addressed in the Special Issue are as follows:

  • Development of specific design-oriented response modification factors for hybrid structural systems;
  • Development of simplified analysis approaches to account for the influence of higher modes;
  • Performance-based simplified approaches for seismic response evaluation;
  • Development of simplified seismic-induced degradation models for loss assessment;
  • Ad-hoc seismic amplification factors for non-structural demands;
  • Equivalent macro-models for complex structural and non-structural systems.

Dr. Gianni Blasi
Dr. Sergio Ruggieri
Guest Editors

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Keywords

  • simplified seismic analysis
  • practice-oriented models
  • complex structural systems
  • equivalent macro-models
  • numerical analysis
  • analytical models
  • performance-based models

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Published Papers (2 papers)

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Research

18 pages, 8367 KiB  
Article
Passive Seismic Surveys for a Simplified Experimental Dynamic Characterization of the Messina Bell Tower (Sicily, Italy)
by Sabrina Grassi, Sebastiano Imposa and Gabriele Morreale
Appl. Sci. 2025, 15(9), 4973; https://doi.org/10.3390/app15094973 - 30 Apr 2025
Viewed by 122
Abstract
This study proposes a simplified approach for the experimental dynamic characterization of the historic Messina Bell Tower (northeastern Sicily) using passive seismic single-station surveys. The Horizontal-to-Vertical Spectral Ratio (HVSR) analysis identified a site resonance frequency of approximately 1.06 Hz, while the Multichannel Analysis [...] Read more.
This study proposes a simplified approach for the experimental dynamic characterization of the historic Messina Bell Tower (northeastern Sicily) using passive seismic single-station surveys. The Horizontal-to-Vertical Spectral Ratio (HVSR) analysis identified a site resonance frequency of approximately 1.06 Hz, while the Multichannel Analysis of Surface Waves (MASW) survey contributed to the characterization of the shear wave velocity profile, providing a coherent geophysical framework useful for structural dynamic analysis. Spectral ratios analysis revealed four distinct vibration modes, including a fundamental rocking mode (~1.4 Hz), a torsional mode (3.5 Hz), and two higher-frequencies flexural modes. The structure’s dynamic behavior, notably its sensitivity to torsion and rocking, is attributed to the deformable subsoil. Damping ratios estimated via the Random Decrement Method (RDM) were below 1%, consistent with the expected linear elastic response under ambient vibrations. The results show strong agreement with previous long-term monitoring, validating the effectiveness of passive seismic techniques for rapid, non-invasive assessment. This study demonstrates that streamlined, time-efficient methodologies are capable of delivering modal parameters consistent with those obtained from more extensive and resource-intensive monitoring campaigns, thereby providing a reliable and practical approach for the seismic vulnerability assessment of heritage structures. Full article
(This article belongs to the Special Issue Simplified Seismic Analysis of Complex Civil Structures)
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15 pages, 1193 KiB  
Article
Assessing Seismic Vulnerability and Pollution Risks of Wastewater Treatment Plants
by Spyridon K. Golfinopoulos, Ploutarchos N. Kerpelis and Dimitrios E. Alexakis
Appl. Sci. 2025, 15(1), 239; https://doi.org/10.3390/app15010239 - 30 Dec 2024
Viewed by 720
Abstract
Empirical studies are valuable for assessing soil and water pollution, as they can reduce costs and save time. The present study discusses previous research results using a questionnaire to gather experts’ judgments on technical issues and potential pollution related to the vulnerability of [...] Read more.
Empirical studies are valuable for assessing soil and water pollution, as they can reduce costs and save time. The present study discusses previous research results using a questionnaire to gather experts’ judgments on technical issues and potential pollution related to the vulnerability of Wastewater Treatment Plants (WWTPs) in Greece. The questionnaire included 44 closed-type questions based on the Likert Scale. It was distributed to a representative sample of 116 operators over seven (7) months (April–November 2021). Geographical Information Systems (GISs) were employed to visualize the spatial distribution of the seismic vulnerability of WWTPs. The study outputs include eight (8) maps depicting the spatial distribution of seismic vulnerability, both with and considering soil–water pollution, by calculating the existence of seismic hazards and identifying potentially affected regions. Additionally, eight (8) tables support this analysis. The survey findings highlight the most vulnerable regions and WWTPs in the country. The results suggest that after excluding Zone III, the WWTPs of Zone II of the national Seismic Hazard Map (SHM) are estimated to be the most vulnerable. This study spatially visualizes the indicator of seismic vulnerability (ISV) and the seismic vulnerability index concerning potential soil–water pollution (ISV-REF), according to the SHM and regions. Most WWTPs have low ISV-REF, while maps illustrate the exceedance of that parameter, identifying the safest units and indicating that Zone I has the safest units according to the exceedance percentages. Integrating data on regions, ISV, ISV-REF, and their exceedance in GIS could lead to authorities’ and technicians’ decisions to implement quick measures. Researchers should also focus their studies more precisely, mitigating the seismic vulnerability of critical infrastructure, such as WWTPs. Full article
(This article belongs to the Special Issue Simplified Seismic Analysis of Complex Civil Structures)
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