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2024 IEEE International Workshop on Metrology for Living Environment, MetroLivEnv 2024

作者： Pinchuk, Nataliia Castellano, Anna Micello, Daniele Camassa, Domenico Diaferio, Mariella Fraddosio, Aguinaldo National University 'Yuri Kondratyuk Poltava Polytechnic' Poltava Ukraine Polytechnic University of Bari Department of Architecture Construction and Design Bari70125 Italy Polytechnic University of Bari Department of Civil Engineering Sciences and Architecture Bari70125 Italy Polytechnic University of Bari Department of Civil Environmental Land Construction and Chemistry Engineering Bari70125 Italy

ISBN: (纸本)9798350385014

The preservation, the safeguard and the valorization of the existing architectural heritage requires the development of theoretical and experimental approaches that can effectively identify any damage of the structures that could lead to their collapse. In the case of masonry constructions, the methodology becomes complex both due to the uncertainties deriving from the mechanical behavior of the masonry material, and due to the necessity to use contactless experimental approaches, which do not lead to the damage of the structure and can also be performed during the service life phase. In this article, we propose a damage identification method for masonry arches and vaults, based on the analysis of the dynamic tests results. In particular, our approach is able to identify the collapse mechanism of masonry curved structures in terms of position of hinges and depths of cracks. The case study consists of a clay-brick masonry arch subjected to an eccentric load on extrados. The experimental values of frequencies were used to calibrate a numerical model of the undamaged arch. A comparison between numerical and experimental frequencies values related to damaged and undamaged configuration was allowed to develop an effective approach to identify the collapse mechanism of arch. © 2024 IEEE.

关键词： Arches

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Dynamic Identification and Automatic Updating of the Numerical Model of a Masonry Tower

Dynamic Identification and Automatic Updating of the Numeric...

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Experimental Vibration Analysis for Civil engineering Structures - EVACES 2023 - Volume 2

作者： Salachoris, Georgios Panagiotis Standoli, Gianluca Schiavoni, Mattia Clementi, Francesco Department of Civil and Building Engineering and Architecture Polytechnic University of Marche Ancona Italy

ISBN: (纸本)9783031391088

The actual dynamic behavior of the masonry civic Clock tower in a little village, heavily damaged by the recent 2016 seismic sequence of central Italy, is thoroughly investigated by means of a detailed numerical model built and calibrated using the experimental modal properties obtained through Ambient Vibration Tests. The goal is to update the uncertain parameters of the Finite Element Model (elastic moduli, mass densities, constraints, and boundary conditions) to minimize the discrepancy between experimental and numerical dynamic features. Due to the high nonlinear dependency of the objective function of this optimization problem on the afore-mentioned parameters, and the likely possibility to get trapped in local minima, a fully automated Finite Element Model Updating procedure based on genetic algorithms and global optimization is used, leading to the successful estimation of the uncertain parameters of the tower. The results allowed to create a reference digital replica of the current structural condition of the tower and to set the performance standards that will help to optimize the control of the structural integrity over time. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Genetic algorithms

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Numerical Simulation of Push-and-Release Tests of Hybrid Isolation Systems 18th

Numerical Simulation of Push-and-Release Tests of Hybrid Iso...

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18th World Conference on Seismic Isolation, Energy Dissipation, and Active Vibration Control of Structures, WCSI 2023

作者： Micozzi, Fabio Poeta, Alberto Gioiella, Laura Ragni, Laura Dall’Asta, Andrea School of Architecture and Design University of Camerino AP Ascoli Piceno Italy Department of Civil and Building Engineering and Architecture Polytechnic University of Marche AN Ancona Italy

ISBN: (纸本)9783031668876

This study illustrates the comparison between the experimental testing of a two-storey braced-frame structure semically protected by means of and isolation system and the simulation of such tests. More in detail, the steel structure rests on a reinforced concrete slab isolated from the foundations through a hybrid system consisting of 28 High-damping Rubber Bearings (HDRBs) and 36 low-friction sliders (LFSs). During the building design the removable push-and-release device, the reaction wall, and the pushing point were also designed to minimize the cost of the tests and to allow repeated testing throughout the service life of the building. The global dynamic response was tested up to displacement amplitudes similar to those induced by extreme seismic events. In particular, maximum horizontal displacements of 285 mm and 227 mm in the quasi-static and dynamic tests are reached respectively. Conseqeuntly, the test can be de-facto considered as an in-situ verification of the seismic behaviour of the isolation system. However, in the case case of elastomeric bearings this testing procedure is not properly equivalent to an earthquake excitation, mainly due to the different deformation velocities and the not negligible viscous effects of HDRBs. Therefore, this work aims at understanding and evaluating the observed experimental behaviour by assessing and calibrating a model able to simulate all the the viscous effects and the energy dissipated by the sliders. This way, the viscous displacement accumulated during the loading phase, causing the system to oscillate around a non zero displacement during the release phase, can be simulated. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Concrete slabs

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Seismic Retrofitting Techniques for Masonry Infills: A Review of Existing Design Strategies 18th

Seismic Retrofitting Techniques for Masonry Infills: A Revie...

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18th International Brick and Block Masonry Conference, IB2MaC 2024

作者： Gao, Yuewen Milani, Gabriele Department of Architecture Built Environment and Construction Engineering Politecnico di Milano Milan20133 Italy Department of Civil Engineering Yangzhou Polytechnic Institute Yangzhou225127 China

ISBN: (纸本)9783031733130

Damage and collapse of masonry infills are widely observed in earthquakes. It is also found that the economic losses caused by the failure of masonry infill walls, such as repair or reconstruction costs of walls, equipment damage, and functional loss of the buildings, may even far exceed those caused by structural members. The primary objective of this paper is to present a general review of the different kinds of interventions carried out to protect the infills not only preventing the in-plane damage but also improving out-of-plane stability. Besides, as far as the state of the art is concerned, a taxonomy of the interventions is proposed, and the advantages and limitations of each group of interventions are discussed. Lastly, a preliminary conception of a new preservation system made by eco-sustainable regenerated rubber is proposed, not only to prevent damage that occurs in infills but also to limit costs and facilitate installation. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Walls (structural partitions)

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A TECHNICAL SOLUTION FOR OPTICAL VIRTUAL WINDOWS IN MASS-SCREENED LUNAR HABITATS 27

A TECHNICAL SOLUTION FOR OPTICAL VIRTUAL WINDOWS IN MASS-SCR...

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27th IAA Symposium on Human Exploration of the Solar System at the 75th International Astronautical Congress, IAC 2024

作者： Manni, Valentino Genta, Giancarlo Valzano, Luca Saverio Peroni, Marco Actis, Cristina Department of Architecture and Design Polytechnic University of Turin Turin Italy Department of Mechanical and Aerospace Engineering Polytechnic University of Turin Turin Italy Marco Peroni Ingegneria Faenza Italy

ISBN: (纸本)9798331312107

In recent years, a renewed interest in lunar exploration has arisen once again. A review of the research on exploration of the Moon shows that there are significant challenges related to establishing a base for humans in the harsh lunar environment. If the Earth's surface is protected by its magnetosphere and its atmosphere against cosmic radiation, solar flares, and micrometeorite impacts, the lunar surface, instead, has no magnetic field that deflects charged particles and no radiation-absorbing and micrometeorite-consuming atmosphere at all. The possibility of protecting human beings from radiation and micrometeorites by exploiting passive shielding techniques, using the locally available regolith to build a thick massive envelope, is effective, but it has an intrinsic drawback: the buildings must have small viewports, or even no viewports at all. Numerous studies conducted since the 1950s in harsh terrestrial environments such as deserts, undersea habitats, and Antarctica have shown that Habitability and Human Factors (H&HF) in Isolated and Confined Environments (ICEs), like lunar habitats, are critical for the well-being of crew members. Among these factors, the capability to have an external view is essential. In lunar habitats the integration of passive radiation shielding with viewports or vision systems can enhance psychological well-being, reduce stress, improve spatial awareness and facilitate the monitoring of external activities. However, the technical solutions developed so far, such as small observation posts with protective shutters or digital virtual screens, do not allow for or limit direct and continuous external view. The paper proposes an optical virtual window based on image reflection that is compatible with a massive structure, allowing direct observation while protecting against radiation exposure and impacts of micrometeorites. This technological system enables the direct view of the external environment, mitigating psychological effects de

关键词： Cosmic rays

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A Simplified Method for the Stress Analysis of Underground Transfer Structures Crossing Multiple Subway Tunnels

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Computer Modeling in engineering & Sciences 2024年第6期139卷 2893-2915页

作者： Shen Yan Dajiang Geng Ning Dai Mingjian Long Zhicheng Bai College of Civil Engineering Tongji UniversityShanghai200092China China Construction 4th Engineering Bureau 6th Corp. Ltd.Shanghai201199China Department of Civil and Architecture Engineering Hubei Polytechnic UniversityHuangshi435003China

According to the design specifications,the construction of extended piles involves traversing the tunnel’s upper region and extending to the underlying rock *** address this challenge,a subterranean transfer structure spanning multiple subway tunnels was *** on the function of piles in the transfer structure as springs with axial and bending stiffness,and taking into account the force balance and deformation coordination conditions of beams and plates within the transfer structure,we established a simplified mechanical model that incorporates soil stratification by combining it with the Winkler elastic foundation beam *** resolved established simplifiedmechanicalmodel employed finite difference technology and the Newton-Simpsonmethod,elucidating the mechanical mechanism of the transfer *** research findings suggest that the load carried by the upper structural columns can be transferred to the pile foundation beneath the beams through the transfer structure,subsequently reaching the deep soil layer and ensuring minimal impact on adjacent *** established simplified analysis method can be used for stress analysis of the transfer structure,concurrently considering soil stratification,pile foundation behavior,and plate *** pile length,pile section size,and beam section size within the transfer structure should account for the characteristics of the upper load,ensuring an even distribution of the beam bending moment.

关键词： Crossing tunnels transfer structure force mechanism simplify analysis layered soil mass

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Investigating the Seismic Performance of RC Buildings Using Nonlinear Incremental Dynamic Analysis 33rd

Investigating the Seismic Performance of RC Buildings Using ...

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33rd International Conference on Organization and Technology of Maintenance, OTO 2024

作者： Leti, Marsed Bidaj, Altin Ormeni, Rrapo Bilgin, Hüseyin Faculty of Architecture and Engineering Department of Civil Engineering EPOKA University Tirana Albania Department of Mechanics of Structures Engineering Polytechnic University of Tirana Tirana Albania Academy of Sciences of Albania Tirana Albania

ISBN: (纸本)9783031805967

The seismic performance of premodern buildings, which were often constructed without contemporary seismic codes, is critical due to the potential catastrophic consequences of earthquakes. Persistent updates to seismic codes aim to reduce structural vulnerabilities and risks, especially in seismically active regions, by incorporating the latest research and empirical data. This study applies modern Incremental Dynamic Analysis (IDA) to an old, reinforced concrete (RC) building designed using premodern codes in Albania. This building was implemented as a template project across various locations in the country which represents a significant risk due to its continued use in our seismically active region frequently affected by earthquakes. The study provides a detailed methodology for applying IDA based on current guidelines and coherent studies. The building is modeled as 2D frames in both orthogonal directions using ZEUS-NL software. IDA curves are derived from 20 ground motion records, with 5% damped first mode spectral acceleration, (Sa(T1,5%)) as the intensity measure (IM) and maximum global drift ratio (ϴmax) as the damage measure (DM). Limit states are defined according to FEMA 356 standards. The IDA curves are then categorized into 16th, 50th and 84th percentiles, as recommended in the literature. Final results provide statistical data on the vulnerability of the building based on the IM and DM parameters selected for this study. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Seismic response

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Nervi’s Isostatic Lines’ Inspired Floor Slabs. Beyond the Archetypal Gatti Woolen Mill in Rome 2nd

Nervi’s Isostatic Lines’ Inspired Floor Slabs. Beyond the...

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2nd Italian Workshop on Shell and Spatial Structures, IWSS 2023

作者： Lembo, Marta Bologna, Alberto Romeo, Francesco Department of Architecture Construction and Design Polytechnic of Bari Bari Italy Department of Architecture and Design Sapienza University of Rome Rome Italy Department of Structural and Geotechnical Engineering Sapienza University of Rome Rome Italy

ISBN: (纸本)9783031443275

In 1949 the construction company Nervi & Bartoli patented in Italy a construction system for two-dimensional structures with ribs bent in accordance with isostatic lines of bending moments or normal stresses, invented by an engineer from its staff: Aldo Arcangeli. In the years to come "isostatic lines" ribbed slab would become one of the main and distinctive archetypes used by Pier Luigi Nervi throughout the world. This is a cast-in-place reinforced concrete ribbed slab combining static efficiency with aesthetic and spatial qualities. The paper will present different case-studies, demonstrating (with a trans-disciplinary approach) how and when aesthetic, static and constructive issues overcome a rigorous mathematical morphogenesis. Case studies will show how the different patterns of the ribs are influenced both by structural instances (e.g. geometry, loads and constraints) and by the specificities imposed by each design and building site (e.g. use, craftmanship, economy, and replicability). © 2024, The Author(s), under exclusive license to Springer Nature Switzerland AG.

关键词： Piers

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Circular Economy in the Built Environment Management Supported by Digital Twin. A Review

Circular Economy in the Built Environment Management Support...

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2024 IEEE International Workshop on Metrology for Living Environment, MetroLivEnv 2024

作者： Marchionni, Chiara Corneli, Alessandra Building and Environmental Engineering University of L'Aquila Department of Civil L'Aquila Italy Civil Engineering and Architecture Polytechnic University of Marche Department of Construction Ancona Italy

ISBN: (纸本)9798350385014

Managing the built environment according to the principles of the Circular Economy (CE), with the aim of limiting energy consumption and environmental pollution, is a highly topical issue. In this context, digitization can play a crucial role in promoting virtuous scenarios. However, the review of the literature reveals a distinct lack of in-depth investigation of the intersection between promotion of strategies related to the CE of the built environment using a digital approach, as Digital Twin (DT). In fact, in a sector characterized by low permeability to the introduction of new technologies, introducing digitization with the aim of greater efficiency is not easy. In recent years the DT approach has been gaining ground, namely, the development of digital copies that make it possible to investigate or simulate scenarios in real time. This brief review aims to examine the existing studies and to identify challenges and further research needs. The results will ensure a deeper understanding of the topic, facilitating its development and promoting circular building management practices. © 2024 IEEE.

关键词： Energy utilization

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A Proposal of a Neural Predictor of Residual Compressive Strength in an SCC Exposed to High Temperatures for Resilient Housing 7

A Proposal of a Neural Predictor of Residual Compressive Str...

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7th IEEE International Humanitarian Technologies Conference, IHTC 2024

作者： Scala, Armando La Rizzo, Fabio Carnimeo, Leonarda Chorro, Salvador Ivorra Foti, Dora Polytechnic University of Bari Department of Architecture Construction and Design Bari Italy Polytechnic University of Bari Department of Electrical and Information Engineering Bari Italy University of Alicante Deparment of Civil Engineering San Vicentedel Raspeig Spain

ISBN: (纸本)9798350354645

This paper reports a proposal of a neural predictor, which could usefully improve performance in predicting the compressive strength of SCC, when used for innovative housing. The predictor is intended for its ability to provide accurate predictions on structures where verification against high temperatures should be required, thus offering an interesting possibility for resilient housing *** detail, predictions of the mechanical properties of Self-Compacting Concretes (SCC) after exposure to high temperatures will be obtained by designing a neural predictor for residual compressive strengths of this type of concrete for resilient housing. All considered data refer to SCC samples heated up to 800°C and subjected to standard compression *** this work, the proposed neural predictor will be related to temperature and geometric ratio of each SCC *** interesting behavior in capturing the complex relationships between input variables and residual compressive strengths of SCCs will be shown by the proposed neural network. Results in terms of residual compressive strengths are reported. © 2024 IEEE.

关键词： Compression testing

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