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The thirty-plus years of progress in the field of structural health monitoring (SHM) have left a paramount impact on our everyday lives. Be it for the monitoring of fixed- and rotary-wing aircrafts, for the preservation of the cultural and architectural heritage, or for the predictive maintenance of long-span bridges or wind farms, SHM has shaped the framework of many engineering fields. Given the current state of quantitative and principled methodologies, it is nowadays possible to rapidly and consistently evaluate the structural safety of industrial machines, modern concrete buildings, historical masonry complexes, etc., to test their capability and to serve their intended purpose. However, old unsolved problematics as well as new challenges exist. Furthermore, unprecedented conditions, such as stricter safety requirements and ageing civil infrastructure, pose new challenges for confrontation. Therefore, this Special Issue gathers the main contributions of academics and practitioners in civil, aerospace, and mechanical engineering to provide a common ground for structural health monitoring in dealing with old and new aspects of this ever-growing research field.

Technology: general issues --- dynamic characteristic --- GB-RAR --- super high-rise building --- displacement --- wheel flat --- real-time monitoring --- strain distribution characteristics --- multisensor array --- precise positioning --- noncontact remote sensing (NRS) --- optical flow algorithm --- structural health monitoring (SHM) --- uniaxial automatic cruise acquisition device --- noise robustness --- sensitivity analysis --- cross-modal strain energy --- damage detection --- subspace system identification --- data-driven stochastic subspace identification (SSI-DATA) --- covariance-driven stochastic subspace identification (SSI-COV) --- combined subspace system identification --- PRISMA --- vibration-based damage detection --- crack damage detection --- piezoelectric impedance --- piezoelectric admittance --- peak frequency --- Bayesian inference --- uncertainty quantification --- masonry structures --- seismic structural health monitoring --- Bouc–Wen model --- model calibration --- hysteretic system identification --- BOTDR --- CFRP sheet --- un-bonded position --- cover delamination --- interfacial de-bonding --- monitoring system --- pipeline --- health and structural integrity --- Particle Impact Damper --- adaptive-passive damping --- damping of vibrations --- experiments --- submerged floating tunnel --- deep neural network --- machine learning --- sensor optimization --- failure monitoring accuracy --- mooring line --- sigmoid function --- Adamax --- categorical cross-entropy --- bending test --- bridge --- “compression–softening” theory --- frequency --- inverse problem --- nondestructive testing (NDT) method --- prestressed concrete (PC) girder --- prestress force determination --- prestress loss --- vertical deflection measurement --- rail --- guided wave ultrasound --- broken rail detection --- rail diagnostics --- structural health monitoring --- non destructive testing --- shape sensing --- inverse Finite Element Method --- fiber optics --- full-field reconstruction --- Structural Health Monitoring --- extreme function theory --- non-destructive testing --- extreme value theory --- generalised extreme distribution --- n/a --- Bouc-Wen model --- "compression-softening" theory

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The thirty-plus years of progress in the field of structural health monitoring (SHM) have left a paramount impact on our everyday lives. Be it for the monitoring of fixed- and rotary-wing aircrafts, for the preservation of the cultural and architectural heritage, or for the predictive maintenance of long-span bridges or wind farms, SHM has shaped the framework of many engineering fields. Given the current state of quantitative and principled methodologies, it is nowadays possible to rapidly and consistently evaluate the structural safety of industrial machines, modern concrete buildings, historical masonry complexes, etc., to test their capability and to serve their intended purpose. However, old unsolved problematics as well as new challenges exist. Furthermore, unprecedented conditions, such as stricter safety requirements and ageing civil infrastructure, pose new challenges for confrontation. Therefore, this Special Issue gathers the main contributions of academics and practitioners in civil, aerospace, and mechanical engineering to provide a common ground for structural health monitoring in dealing with old and new aspects of this ever-growing research field.

Technology: general issues --- dynamic characteristic --- GB-RAR --- super high-rise building --- displacement --- wheel flat --- real-time monitoring --- strain distribution characteristics --- multisensor array --- precise positioning --- noncontact remote sensing (NRS) --- optical flow algorithm --- structural health monitoring (SHM) --- uniaxial automatic cruise acquisition device --- noise robustness --- sensitivity analysis --- cross-modal strain energy --- damage detection --- subspace system identification --- data-driven stochastic subspace identification (SSI-DATA) --- covariance-driven stochastic subspace identification (SSI-COV) --- combined subspace system identification --- PRISMA --- vibration-based damage detection --- crack damage detection --- piezoelectric impedance --- piezoelectric admittance --- peak frequency --- Bayesian inference --- uncertainty quantification --- masonry structures --- seismic structural health monitoring --- Bouc-Wen model --- model calibration --- hysteretic system identification --- BOTDR --- CFRP sheet --- un-bonded position --- cover delamination --- interfacial de-bonding --- monitoring system --- pipeline --- health and structural integrity --- Particle Impact Damper --- adaptive-passive damping --- damping of vibrations --- experiments --- submerged floating tunnel --- deep neural network --- machine learning --- sensor optimization --- failure monitoring accuracy --- mooring line --- sigmoid function --- Adamax --- categorical cross-entropy --- bending test --- bridge --- "compression-softening" theory --- frequency --- inverse problem --- nondestructive testing (NDT) method --- prestressed concrete (PC) girder --- prestress force determination --- prestress loss --- vertical deflection measurement --- rail --- guided wave ultrasound --- broken rail detection --- rail diagnostics --- structural health monitoring --- non destructive testing --- shape sensing --- inverse Finite Element Method --- fiber optics --- full-field reconstruction --- Structural Health Monitoring --- extreme function theory --- non-destructive testing --- extreme value theory --- generalised extreme distribution

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Developments in the science and technology of textiles are not only limited to apparel and fashion. Certainly, there are research efforts aimed at improving the construction and processing of textiles for clothing—such as studies on cleaner production to reduce environmental impact, increasing the utilization of fibers and process chemicals from renewable resources, and on the recycling of materials from post-consumer waste apparel back into the manufacturing of new clothing articles. In addition, technological concepts developed for the creation of clothing over the centuries are now being investigated for use in a diverse array of fields—such as in the manufacture of engineering composites, personal protective equipment, and medicine. Further, developments in other fields—such as electronics, nanotechnology, and information and communication technologies—are being investigated for their incorporation into apparel and clothing to create “smart textiles”. The aim of this Special Issue is to put together a collection of scientific reports on such efforts to highlight the range of scientific and technological issues that are being targeted and the ingenuity of the methodologies employed to find answers. It is hoped that readers of this issue will come away with an appreciation of the research being conducted in this area, and perhaps gain inspiration for their own scientific endeavors.

History of engineering & technology --- Polyimide fiber --- thermal stability --- swelling agent --- dyeability --- carbon textile reinforced mortar --- uniaxial tensile tests --- debonding failure --- steel fibers --- prestress --- multi-cracking pattern --- polyacrylonitrile --- polyaniline --- conductive fibers --- flax fiber-reinforced composite --- strain rate effect --- Johnson–Cook model --- lattice structure --- failure mechanism --- textiles --- composite preforming --- mechanical properties --- shear behavior --- surface analysis --- picture frame test --- kinematic draping simulation --- textile --- PET --- biomaterials --- iPS-cells --- cardiomyocytes --- maturation --- gene expression --- electronic textiles --- AMOLED --- OTFTs --- OLEDs --- textile displays --- organic thin film --- graft polymerization --- surface modification --- hydrogels --- gamma irradiation --- silver nanoparticles --- antibacterial activity --- temperature sensor --- conductivity --- coatings --- deposition --- thermocouple --- material characterization --- smart clothing --- temperature sensing --- wearable technology --- nanomaterials --- environmental impacts --- toxicity --- health and safety --- conductive fibres --- cellulose fibres --- pressure sensor --- smart textiles --- viscose fibres --- carbon black --- biocementation --- MICP --- jute fibres --- unconfined compressive strength --- urea hydrolysis --- sustainable geotechnics --- self-healing --- n/a --- Johnson-Cook model

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Developments in the science and technology of textiles are not only limited to apparel and fashion. Certainly, there are research efforts aimed at improving the construction and processing of textiles for clothing—such as studies on cleaner production to reduce environmental impact, increasing the utilization of fibers and process chemicals from renewable resources, and on the recycling of materials from post-consumer waste apparel back into the manufacturing of new clothing articles. In addition, technological concepts developed for the creation of clothing over the centuries are now being investigated for use in a diverse array of fields—such as in the manufacture of engineering composites, personal protective equipment, and medicine. Further, developments in other fields—such as electronics, nanotechnology, and information and communication technologies—are being investigated for their incorporation into apparel and clothing to create “smart textiles”. The aim of this Special Issue is to put together a collection of scientific reports on such efforts to highlight the range of scientific and technological issues that are being targeted and the ingenuity of the methodologies employed to find answers. It is hoped that readers of this issue will come away with an appreciation of the research being conducted in this area, and perhaps gain inspiration for their own scientific endeavors.

Polyimide fiber --- thermal stability --- swelling agent --- dyeability --- carbon textile reinforced mortar --- uniaxial tensile tests --- debonding failure --- steel fibers --- prestress --- multi-cracking pattern --- polyacrylonitrile --- polyaniline --- conductive fibers --- flax fiber-reinforced composite --- strain rate effect --- Johnson–Cook model --- lattice structure --- failure mechanism --- textiles --- composite preforming --- mechanical properties --- shear behavior --- surface analysis --- picture frame test --- kinematic draping simulation --- textile --- PET --- biomaterials --- iPS-cells --- cardiomyocytes --- maturation --- gene expression --- electronic textiles --- AMOLED --- OTFTs --- OLEDs --- textile displays --- organic thin film --- graft polymerization --- surface modification --- hydrogels --- gamma irradiation --- silver nanoparticles --- antibacterial activity --- temperature sensor --- conductivity --- coatings --- deposition --- thermocouple --- material characterization --- smart clothing --- temperature sensing --- wearable technology --- nanomaterials --- environmental impacts --- toxicity --- health and safety --- conductive fibres --- cellulose fibres --- pressure sensor --- smart textiles --- viscose fibres --- carbon black --- biocementation --- MICP --- jute fibres --- unconfined compressive strength --- urea hydrolysis --- sustainable geotechnics --- self-healing --- n/a --- Johnson-Cook model

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Concrete is the most widely utilized construction material in the world. Thus, any action intended to enhance the sustainability of the construction industry must consider the supply chain, production, distribution demolition and eventual disposal, landfilling or recycling of this composite material. High-performance concrete may be one of the most effective options to make the construction sector more sustainable. Experience proves that the use of recycled concrete aggregates, as well as the partial replacement of ordinary Portland cement with other supplementary cementitious materials or alternative binders, are generally accepted as the most realistic solutions to reduce the environmental impacts, leading to sufficiently high mechanical performances. In structural applications such as those concerning the seismic and energy retrofitting of existing buildings, the use of high-performance cementitious composites often represents the more cost-effective solution, which allows us to minimize the costs of the intervention and the environmental impact. Eventually, the challenge of enhancing sustainability by raising durability of concrete structures is particularly relevant in those applications where maintenance is particularly expensive and impactful, in terms of both direct intervention costs and indirect costs deriving from downtime. The present Special Issue aims at providing readers with the most recent research results on the aforementioned subjects and further foster a collaboration between the scientific community and the industrial sector on a common commitment towards sustainable concrete constructions.

Technology: general issues --- History of engineering & technology --- recycled concrete aggregate --- recycled aggregate concrete --- durability --- freeze-thaw cycles --- mechanical properties --- concrete --- recycled concrete --- recycled aggregate --- shrinkage --- slags --- cement replacement --- existing beams --- retrofitting method --- environmental assessment --- fly ash --- moment-curvature relationship --- precast elements --- basalt --- concrete properties --- recycled natural basalt --- recycled concrete powder --- seismic retrofitting --- multilayer coating --- Steel Fiber Reinforced Mortar --- energy performance of buildings --- point thermal bridges --- thermal behavior in summer --- case study --- prestressed concrete --- prestress losses --- bridges --- flexural strength --- shear strength --- drying and autogenous shrinkage --- creep --- sustainability --- shear bond --- UHPFRC --- push-off test --- tensile bond strength --- concrete overlay --- strengthening --- existing infrastructures --- digital microscopy --- surface roughness --- mortars --- MSWI bottom ash --- pozzolanic activity --- supplementary cementing materials --- water-retaining structures --- aggressive environment