[PDF] Two Way Shear Strength Of Reinforced Concrete Slab Column Connections eBook

Author : Leandro Sebastian Montagna
Publisher :
Page : 238 pages
File Size : 24,98 MB
Release : 2018
Category :
ISBN :

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To assess the two-way shear resistance, or punching shear strength, of reinforced concrete slabs, code provisions fitted from experimental data are typically employed. The experimental data forming the bases of these provisions have generally consisted of isolated slab-column connection tests that seek to represent the negative moment region of a flat plate slab. This research is focused on exploring the variation in the punching performance of slab-column connections when the typical testing conditions used to investigate isolated slab specimen are varied in a manner that produces alternative sectional loading conditions within the column connection region. To accomplish this, an innovative testing apparatus is introduced that permits alternative combinations of slab bending moment to out-of-plane shear force ratios to be applied to the slab-column connection. Results are presented from an experimental program conducted at the Ferguson Structural Engineering Laboratory (FSEL) of The University of Texas at Austin and an analysis is presented comparing the results from the tests with estimations made from current standards, the Critical Crack Shear Theory (CSCT), and also from numerical models. The data obtained from the experimental program are used to scrutinize current design and analysis procedures, and to shed light on the significance of the sectional loading conditions in the light of flat plate connection shear resisting performance.

Author : Widianto
Publisher :
Page : 374 pages
File Size : 12,82 MB
Release : 2006
Category :
ISBN : 9780549068044

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Guidelines for the evaluation and rehabilitation of existing slab-column connections are given. These guidelines are based on the results of the tests conducted in this study and on the synthesis of the literature review conducted as part of this project.

Author : Marvin E. Criswell
Publisher :
Page : 434 pages
File Size : 32,25 MB
Release : 1970
Category : Columns, Concrete
ISBN :

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The objectives of this investigation were to study the strength and behavior of slowly (statically) loaded reinforced concrete slab-column connections and to determine the effect of rapid (dynamic) loading on the strength and behavior by comparison with the static test results. Nineteen full-scale models of a connection and adjoining slab area, consisting of a simply supported slab 84 or 94 inches square and 6-1/2 inches thick loaded concentrically on a 10- or 20-inch-square stub column at the center of the slab, were tested. The main variables were the amounts of reinforcement in the slab (p = 0.75 and 1.50 percent), the column size, and the loading speed. Eight specimens were loaded to failure statically, two were subjected to a very rapidly applied load of short duration, and nine were loaded to failure by a rapidly applied load with a rise time chosen to represent the conditions in a blast-loaded structure. The static test results are compared with 12 shear strength prediction methods. Differences between the mechanism of shear failure in slabs and beams are examined. (Author).

Author : Mario Glikman
Publisher :
Page : 166 pages
File Size : 32,88 MB
Release : 2016
Category :
ISBN :

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Reinforced concrete flat slabs are widely used in modern infrastructure. Due to their comparatively simple construction, flat slabs have become especially prevalent in mid- to high-rise buildings. The performance of slab-column connections has been critically studied over the last several decades by researchers aiming to better understand the behavior of flat slabs subjected to punching shear loading conditions. As a result, the use of slab shear reinforcement has emerged as a practical strategy to improve both the strength and ductility of reinforced concrete flat slabs. The primary objective of this research study was to investigate the behavior of reinforced concrete slab-column connections employing a novel shear reinforcement system consisting of inclined deformed steel reinforcing bars. Results are presented from an experimental program conducted at the Ferguson Structural Engineering Laboratory of The University of Texas at Austin. The results show that a premature failure attributed to inadequate shear reinforcement anchorage controlled the performance of the strengthened slabs. Lastly, a study of the bond stress development in the slab shear reinforcement was carried out to investigate whether this anchorage-driven failure can be captured using different provisions currently available for the assessment of reinforced concrete flat slabs.