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Slab

About: Slab is a research topic. Over the lifetime, 31617 publications have been published within this topic receiving 318693 citations.


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Journal ArticleDOI
TL;DR: In this article, the authors used several different plate motion models to describe plate and trench motions and evaluated the differences among the models and found that only one parameter, namely, the trench migration velocity in a Pacific hot spot reference frame, appears to correlate well with the strength of the subslab splitting signal.
Abstract: [1] The character of the mantle flow field in subduction zones remains poorly understood, despite its importance for our understanding of subduction dynamics. In particular, little attention has been paid to mantle flow beneath subducting slabs. In order to identify processes that make first-order contributions to the global pattern of subslab mantle flow, we have compiled shear wave splitting measurements from subduction zones worldwide from previously published studies and estimated average splitting parameters for the subslab region. Globally, the subslab region is overwhelmingly dominated by trench-parallel fast splitting directions. We tested for relationships between splitting delay time, a measure of the strength of anisotropy, and parameters that are indicators of tectonic processes, such as trench migration velocity, convergence velocity and obliquity, age of subducting lithosphere, and slab dip, curvature, seismicity, and thickness. We used several different plate motion models to describe plate and trench motions and evaluated the differences among the models. We find that only one parameter, namely, the trench migration velocity in a Pacific hot spot reference frame, appears to correlate well with the strength of the subslab splitting signal. This finding supports a model in which the mantle beneath subducting slabs is dominated by three-dimensional flow induced by trench migration. We explore several implications of our model for various aspects of mantle dynamics, including the choice of a suitable reference frame(s) for mantle flow, the existence of a thin decoupling zone between slabs and the subslab mantle, and consequences for mass transfer between the upper and lower mantle.

122 citations

Journal ArticleDOI
01 Mar 1970
TL;DR: In this paper, the wavenumber and the group velocity of the magnetostatic surface wave guided by a ferrite slab magnetized parallel to its face were investigated and an aspect of experimental observation of the group delay times of the magnetic wave supported by a metal plate placed against one of the faces was explained.
Abstract: The wavenumber and the group velocity of the magnetostatic surface wave guided by a ferrite slab magnetized parallel to its face are investigated. One aspect of experimental observation of the group delay times of the magnetostatic surface waves supported by a ferrite slab without and with a metal plate placed against one of the faces is explained.

122 citations

Journal ArticleDOI
TL;DR: In this paper, the authors investigate the influence of low viscosity wedges and channels on subduction zone structure and find that the slabs that are flat lying beneath the overriding plate are preceded by changes in arc chemistry.

122 citations

Journal ArticleDOI
TL;DR: In this article, the authors investigated the influence of a set of mechanical and geometrical parameters on the punching shear strength and deformation capacity of flat slabs supported by interior columns.
Abstract: This paper presents the results of an extensive experimental campaign on 16 flat-slab specimens with and without punching shear reinforcement. The tests aimed to investigate the influence of a set of mechanical and geometrical parameters on the punching shear strength and deformation capacity of flat slabs supported by interior columns. All specimens had the same plan dimensions of 3.0 x 3.0 m (9.84 x 9.84 ft). The investigated parameters were the column size (ranging between 130 and 520 mm [approximately 5 and 20 in.]), the slab thickness (ranging between 250 and 400 mm [approximately 10 and 16 in.]), the shear reinforcement system (studs and stirrups), and the amount of punching shear reinforcement. Systematic measurements (such as the load, the rotations of the slab, the vertical displacements, the change in slab thickness, concrete strains, and strains in the shear reinforcement) allow for an understanding of the behavior of the slab specimens, the activation of the shear reinforcement, and the strains developed in the shear-critical region at failure. Finally, the test results were investigated and compared with reference to design codes (ACI 318-08 and EC2) and the mechanical model of the critical shear crack theory (CSCT), obtaining a number of conclusions on their suitability.

121 citations

Journal ArticleDOI
TL;DR: In this article, the authors presented an analytical model for the analysis of steel-concrete composite beams with partial shear interaction including the shear deformability of the steel component.

121 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
20231,170
20222,180
2021774
20201,133
20191,317