scholarly journals Structural performance of RC flat slabs connected to steel columns with shear heads

2016 ◽  
Vol 117 ◽  
pp. 161-183 ◽  
Author(s):  
D.V. Bompa ◽  
A.Y. Elghazouli
Keyword(s):  
Structural Performance ◽  
Steel Columns ◽  
Flat Slabs

scholarly journals Stability design criteria for closely spaced built-up stainless steel columns

2021 ◽  
Vol 64 (4) ◽  
pp. 235-250
Author(s):  
Jelena Dobrić ◽  
Nina Gluhović ◽  
Zlatko Marković ◽  
Dragan Buđevac
Keyword(s):  
Stainless Steel ◽  
Shear Stiffness ◽  
Minor Axis ◽  
Structural Performance ◽  
Design Criteria ◽  
Geometric Imperfections ◽  
Steel Columns ◽  
Flexural Buckling ◽  
The University ◽  
The Impact

This paper aims to develop design recommendations for closely spaced built-up stainless steel columns, based on findings gained in performed research at the University of Belgrade. The research focuses on pin-ended built-up columns formed from two press-braked channel chords oriented back-to-back and addresses their flexural buckling capacity about the minor axis. The impact of overall and local chord slenderness, interconnection stiffness, geometric imperfections and material nonlinearity is evaluated. In order to fully exploit their structural performance, two separate approaches for the design of built-up columns with welded or bolted interconnections are defined that include different formulas for shear stiffness.

scholarly journals Structural performance assessment of reinforced concrete flat slab-edge column connections under the effects of outward eccentricity

2015 ◽  
Vol 8 (2) ◽  
pp. 164-195
Author(s):  
N. G. B. Albuquerque ◽  
G. S. S. A. Melo
Keyword(s):  
Reinforced Concrete ◽  
Failure Modes ◽  
Concrete Slab ◽  
Bending Moment ◽  
Structural Performance ◽  
Structural Behaviour ◽  
Reinforced Concrete Slab ◽  
Specific Test ◽  
Flat Slabs ◽  
Vertical Displacements

Although several advantages - either constructive or architectural - are assigned to flat slabs, the continuity between consecutive spans in multifloor buildings may turn slab-column connections into a critical region, due to the limited contact between both elements. When transferring moments caused by horizontal and/or vertical eccentric loads are present, these effects are even more pronounced on external panels. Specific studies on the effects of outward eccentricities are still rather scarce, although it is recognized that the codes, in general, are concerned with eventually meeting all potential cases, seeking to improve safety structural performance. Some current recommendations are based on considerable extrapolations, whose theory was originally developed for cases of asymmetric loading at internal connections and need to be consolidated with specific test data. Thus, to investigate the structural behaviour of slabs-edge columns connections, four specimens were tested, reproducing a 2,350 mm x 1,700 mm portion of a 180 mm thick reinforced concrete slab adjacent to a 300 mm x 300 mm cross section squared edge column, with a projection at the base for the imposition of eccentricities. The position of the support under the column has determined the eccentricity, defining in physical terms the interaction between bending moment and shear force, as follows: 300 mm (inward), centred (reference) and 300 mm and 400 mm (outward). Experimental results allowed to comparatively assess the performance of the specimens relating the strain measurements in steel and concrete, vertical displacements, rotations, failure mode and ultimate loads of the slabs. Results indicate that the influence of transferring moments on failure modes is much more pronounced than the shear action in the case of edge connections subjected to outward eccentricities.

Structural performance of rotationally restrained steel columns in fire

2001 ◽  
Vol 36 (7) ◽  
pp. 679-691 ◽  
Author(s):  
Faris Ali ◽  
David O’Connor
Keyword(s):  
Structural Performance ◽  
Steel Columns ◽  
In Fire
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