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Showing 1 to 20 of 26 for “"Horizontal Shear"”.
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Horizontal Shear Connectors for Precast Prestressed Bridge Decks
… as well as for new bridge construction. The horizontal shear strength at the interface between the two interconnected elements is of primary importance in order to provide composite action. The strength of the bond between the two precast members should be high enough to prevent any …
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Analysis of the AASHTO LFRD Horizontal Shear Strength Equation
… in the deck to the girders is done across a shear interface between the two elements. The transfer occurs through the cohesion of the concrete at the interface and then through the shear reinforcement across the interface. Adequate shear strength is essential to the success of the …
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Horizontal Shear Transfer Between Ultra High Performance Concrete And Lightweight Concrete
… Of particular importance is the design of the horizontal shear reinforcement connecting the bridge deck to the top flange of the beams. Without adequate shear transfer, the flexural and shearing capacities will be greatly diminished. The current design equations from ACI and AASHTO were not …
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Horizontal Shear Transfer for Full-Depth Precast Concrete Bridge Deck Panels
… systems with their full composite strength, the horizontal shear resistance provided at the slab-to-beam interface must be quantified through further investigation. Currently, all design equations, both in the AASHTO Specifications and the ACI code, are based upon research for cast-in-place …
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Interface Shear Strength in Lightweight Concrete Bridge Girders
… In order to develop composite action, adequate horizontal shear resistance must be provided at the interface. As lightweight concrete is increasingly being used in bridge designs, it is important to understand the horizontal shear behavior of lightweight concrete. The current AASHTO LRFD …
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Observations of misovortices within the 7 January 2014 Long Lake-Axis-Parallel lake-effect snow band during the Ontario Winter Lake-effect Systems Project
… convergence boundaries associated with cyclonic horizontal shear zones that likely originate from solenoidally-forced secondary circulations within these warm-core bands. In most cases, the shear zone is co-located with a sharp horizontal gradient in radar reflectivity, which corresponds to the …
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The Role of Preexisting Airmass Boundaries in the Maintenance and Rotation of Deep Convection in a High -Cape, Low -Shear Environment
… conducted using an idealized cloud model with a horizontally heterogeneous initialization that included the dominant preexisting airmass boundaries of the 27 May 1997 event. With a localized initialization and no preexisting boundaries, the simulated storm was short-lived and therefore consistent …
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Behaviour of long span composite beams with precast hollow-core slabs
… bending tests were carried out supplemented by horizontal push tests. In addition to the experimental work described, an analytical study is conducted and design recommendations are made. The main issues were the compression behaviour of the hollow-core slabs and the transfer of the horizontal …
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Performance Criteria Recommendations for Mortars Used in Full-Depth Precast Concrete Bridge Deck Panel Systems
… the bridge girders by filling the space in the horizontal shear pockets and the haunches. Several essential mortar characteristics were identified and investigated in order to create a specification that indicates required performance criteria for mortars. This specification can be used to …
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Ultimate strength analysis of partially composite and fully composite open-web steel joists
… composite steel joists with various degrees of shear connection is investigated. The results of eight full-size composite joist tests, conducted as a portion of the study, are presented. Joist spans range from 24 ft. to 30 ft. and depths from 8 in. to 18 in. Six types of mechanical connectors …
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The Genesis and Evolution of African Easterly Waves
… instability process associated with the horizontal shear near the 650 mb level. But the vertical shear of the zonal flow also strongly influences the thermal structure of the unstable wave. It has a thermally indirect secondary circulation centering at about 550 mb and a thermally direct …
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Structural performance evaluation of the Postrite post-treatment corrosion inhibitor system
… for load/deflection analysis. The direct shear and tensile strengths of the overlays were tested and evaluated. Strain gages were used to aid in an overlay to substrate interaction evaluation. The Postrite post-treatment system was determined to have no detrimental effects on the bridge …
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Interaction of an upper-tropospheric jet with a squall line originating along a cold frontal boundary
… are also found to tilt baroclinically generated horizontal shear into the vertical, contributing to the generation of counter rotating ribbons of vertical vorticity parallel to the squall line. The orientation of these ribbons parallel to the squall line was found to couple with vertical momentum …
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Floor Vibrations: Girder Effective Moment of Inertia and Cost Study
… support concrete slabs using joist seats as the horizontal shear connections, and a cost efficiency analysis comparing composite and non-composite floor systems that meet vibrations design standards, were conducted. The first study was undertaken because over-prediction of girder effective moment …
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Radar observations of misovortices within multiple long-lake-axis-parallel lake-effect bands during the OWLeS project
… to secondary circulations within these bands. Horizontal shear along these convergence zones yields vortex sheets that can break into discrete misovortices, likely through horizontal shearing instability (HSI). These misovortices then can strengthen or be maintained via stretching by the band …
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Construction and Behavior of Precast Bridge Deck Panel Systems
… of transverse joints, different types of shear connectors, and different shear pocket spacings. The bridge consisted of two AASHTO type II girders, 40 ft long and simply supported, and five precast bridge deck panels. Two of the transverse joints were epoxied male-female joints and the …
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Development of a Composite Concrete Bridge System for Short-to-Medium-Span Bridges
… investigated analytically in the vertical and horizontal planes. Existing design methods are evaluated and strut-and-tie models, calibrated to match the results of 3-D finite element analyses, are proposed as alternatives to existing methods to aid designers in sizing reinforcing in the end …
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Frequency- and pressure-dependent dynamic soil properties for seismic analysis of deep sites
… the applicability of commonly used standardized shear modulus degradation and damping curves versus shear strain amplitude. The most widely employed degradation and damping curves, are those originally proposed by Seed & Idriss, 1969. Laboratory experimental data (Laird & Stokoe, 1993) performed …
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Dynamics of nonlinear cross-equatorial flow in the deep ocean
… western boundary current profiles undergo a horizontal shear instability that is partially stabilized by viscosity. Calculations at several latitudes indicate that the instability is enhanced in the tropics where the internal deformation radius is a maximum. The linear stability analysis …
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Finite Element Simulation Of Repair Of Delaminated Composite Structures Using Piezoelectric Layers
… loads, is presented. The discontinuity of shear stresses induced at delamination tips due to bending of the beams, under action of concentrated static load and axially compressive load, is studied. This discontinuity of the shear stresses normally leads to the sliding mode of fracture of …
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