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Standard Practice for Direct Design of Precast Concrete Box Sections for Jacking in Trenchless Construction provides the latest in design and recommended installation procedures for precast concrete box sections for jacking in trenchless construction intended for the conveyance of sewage, industrial wastes, storm water and drainage, as well as for utilities and access ways. The Direct Design method accounts for the interaction between the box section and soil or grout envelope in determining loads and distribution of earth pressure on buried box sections, in addition to longitudinal loads due to jacking. The loads and pressure distributions are used to calculate circumferential moment, thrust, and shear in the wall/slab to determine required reinforcement. The design criteria include: structural aspects, such as circumferential flexure, thrust, and shear strengths; crack width control; longitudinal thrust produced by jacking; and handling and installation.

Boxes --- Precast concrete. --- Reinforced concrete construction. --- Soil-structure interaction. --- Trenchless construction. --- Precast concrete --- Jacking --- Trenchless technology --- Concrete construction --- Construction wastes --- Hydraulic design --- Building codes --- Standards and codes --- Design.

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Tunnel jacking is used to construct large shallow underground openings in areas where disruption to surface use and activities cannot be tolerated. The technique of tunnel jacking is not new, but in recent years it has been used to construct openings primarily in Europe and Asia, often under railroad lines and highways. The method has had limited use in the United States; however, a state-of-the-tunnel jacking project currently is underway as part of the Central Artery/Tunnel Project in Boston, Massachusetts. These papers have been prepared by experienced designers of tunnel jacking projects to provide the reader with an introduction to large jacked tunnel design, construction, and instrumentation.

Shoring and underpinning --- Lifting-jacks --- Tunneling --- Jacking --- Tunnels --- Underground construction --- Project management --- Shallow foundations --- Underground structures --- Rail transportation --- Highways and roads --- United States --- Massachusetts --- Europe --- Asia --- Boston

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The phenomenon of soil–structure interactions in marine environments has attracted great attention from coastal geotechnical engineers in recent years. One of the reasons for the growing interest is the rapid development of marine resources (such as in the oil and gas industry, marine renewable energy, and fish farming industry) as well as the damage to marine infrastructure that has occurred in the last two decades. To assist practical engineers in the design and planning of coastal geotechnical projects, a better understanding of the mechanisms of soil–structure interactions in marine environments is desired. This Special Issue reports the recent advances in the problems of structure–seabed interactions in marine environment and provides practical engineers and researchers with information on recent developments in this field.

Technology: general issues --- wave-seabed-structure interactions --- mesh-free model --- local radial basis function collocation method --- oscillatory liquefaction --- irregular wave --- sand --- void ratio --- disturbed state concept --- disturbance function --- constitutive model --- seepage failure --- critical hydraulic gradient --- excess pore pressure --- fluidization degree --- resuspension --- soil --- liquefaction --- fractional order --- cyclic mobility --- spudcan --- stiffness --- reduction --- finite element analysis --- dual-stage Eulerian–Lagrangian technique --- slope stability --- immersed tunnel --- solitary wave --- foundation trench --- numerical modeling --- scour --- marine structures --- numerical modelling --- sediment transport --- Biot’s equations --- multiphase theory --- RANS equations --- seabed --- in situ test --- liquefied submarine sediments --- rheological characteristics --- pile jacking --- consolidation effect --- saturated fine-grained soil --- excess pore water pressure --- pile set-up --- side shear resistance --- hybrid Lagrangian–ALE method --- n/a --- dual-stage Eulerian-Lagrangian technique --- Biot's equations --- hybrid Lagrangian-ALE method

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Exceptional loads on buildings and structures may have different causes, including high-strain dynamic effects due to natural hazards, man-made attacks, and accidents, as well as extreme operational conditions (severe temperature variations, humidity, etc.). All of these aspects can be critical for specific structural typologies and/or materials that are particularly sensitive to external conditions. In this regard, dedicated and refined methods are required for their design, analysis, and maintenance under the expected lifetime. There are major challenges related to the structural typology and material properties with respect to the key features of the imposed design load. Further issues can be derived from the need for risk mitigation or retrofit of existing structures as well as from the optimal and safe design of innovative materials/systems. Finally, in some cases, no appropriate design recommendations are available and, thus, experimental investigations can have a key role within the overall process. In this Special Issue, original research studies, review papers, and experimental and/or numerical investigations are presented for the structural performance assessment of buildings and structures under various extreme conditions that are of interest for design.

History of engineering & technology --- damping device --- seismic design --- design base shear --- nonlinear response history analysis --- liquid storage tank --- earthquake --- wind --- dynamic response --- fluid–solid interaction --- composite shear wall --- seismic behavior --- quasi-static test --- design strength model --- bored-pile --- global strain extensometer --- pile friction resistance --- real-time monitoring --- snow–wind combined experiment facility --- snowdrift --- field observation --- scale experiments --- similarity criterion --- underwater explosion --- composite pressure hull --- whipping --- breathing --- failure index --- laminated glass (LG) --- free vibrations --- fundamental frequency --- mechanical restraints --- field experiments --- analytical modelling --- Finite Element (FE) numerical modelling --- super large cooling tower --- whole construction process --- wind vibration coefficient --- buckling stability --- ultimate bearing capacity --- snow load --- complex roof --- EOF analysis --- characteristics decomposition --- RABT fire curve --- fire simulation --- tunnel fire --- high temperature --- fire safety --- fire accident --- vertical earthquake motion --- seismic response --- atrium-style metro station --- shaking table test --- wind characteristics --- boundary layer --- typhoon --- hurricane --- field measurement --- train derailment --- derailment containment provisions --- collision testing --- post-derailment behavior --- slurry pipe jacking --- friction resistance --- effective friction coefficient --- pipe-soil-slurry interaction --- lubrication efficiency --- concrete --- blast load --- Monte Carlo analysis --- seismic demand --- pushover --- suction caisson --- suction penetration --- soil plug --- hydraulic gradient --- visual tests --- mountainous valley --- bridge site --- boundary transition section (BTS) --- numerical simulation --- wind tunnel test --- small radius TBM interval --- equivalent continuous model --- Winkler elastic foundation beam theory --- transfer matrix method --- horizontal axis deviation --- tall timber buildings --- timber composites --- seismic retrofitting --- Eurocode 8 --- structural assessment --- masonry buildings --- earthquakes --- seismic loads --- existing structures --- reliability --- rehabilitation --- risk --- blast loading --- welded haunch connection --- steel frame structures --- non-linear dynamic analysis --- ABAQUS --- multiple degree of freedom (MDOF) --- frame ductility ratio --- n/a --- fluid-solid interaction --- snow-wind combined experiment facility

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Exceptional loads on buildings and structures may have different causes, including high-strain dynamic effects due to natural hazards, man-made attacks, and accidents, as well as extreme operational conditions (severe temperature variations, humidity, etc.). All of these aspects can be critical for specific structural typologies and/or materials that are particularly sensitive to external conditions. In this regard, dedicated and refined methods are required for their design, analysis, and maintenance under the expected lifetime. There are major challenges related to the structural typology and material properties with respect to the key features of the imposed design load. Further issues can be derived from the need for risk mitigation or retrofit of existing structures as well as from the optimal and safe design of innovative materials/systems. Finally, in some cases, no appropriate design recommendations are available and, thus, experimental investigations can have a key role within the overall process. In this Special Issue, original research studies, review papers, and experimental and/or numerical investigations are presented for the structural performance assessment of buildings and structures under various extreme conditions that are of interest for design.

damping device --- seismic design --- design base shear --- nonlinear response history analysis --- liquid storage tank --- earthquake --- wind --- dynamic response --- fluid–solid interaction --- composite shear wall --- seismic behavior --- quasi-static test --- design strength model --- bored-pile --- global strain extensometer --- pile friction resistance --- real-time monitoring --- snow–wind combined experiment facility --- snowdrift --- field observation --- scale experiments --- similarity criterion --- underwater explosion --- composite pressure hull --- whipping --- breathing --- failure index --- laminated glass (LG) --- free vibrations --- fundamental frequency --- mechanical restraints --- field experiments --- analytical modelling --- Finite Element (FE) numerical modelling --- super large cooling tower --- whole construction process --- wind vibration coefficient --- buckling stability --- ultimate bearing capacity --- snow load --- complex roof --- EOF analysis --- characteristics decomposition --- RABT fire curve --- fire simulation --- tunnel fire --- high temperature --- fire safety --- fire accident --- vertical earthquake motion --- seismic response --- atrium-style metro station --- shaking table test --- wind characteristics --- boundary layer --- typhoon --- hurricane --- field measurement --- train derailment --- derailment containment provisions --- collision testing --- post-derailment behavior --- slurry pipe jacking --- friction resistance --- effective friction coefficient --- pipe-soil-slurry interaction --- lubrication efficiency --- concrete --- blast load --- Monte Carlo analysis --- seismic demand --- pushover --- suction caisson --- suction penetration --- soil plug --- hydraulic gradient --- visual tests --- mountainous valley --- bridge site --- boundary transition section (BTS) --- numerical simulation --- wind tunnel test --- small radius TBM interval --- equivalent continuous model --- Winkler elastic foundation beam theory --- transfer matrix method --- horizontal axis deviation --- tall timber buildings --- timber composites --- seismic retrofitting --- Eurocode 8 --- structural assessment --- masonry buildings --- earthquakes --- seismic loads --- existing structures --- reliability --- rehabilitation --- risk --- blast loading --- welded haunch connection --- steel frame structures --- non-linear dynamic analysis --- ABAQUS --- multiple degree of freedom (MDOF) --- frame ductility ratio --- n/a --- fluid-solid interaction --- snow-wind combined experiment facility