Experimental Tests of a Real Building Seismically Retrofitted by Special Buckling-Restrained Braces

2008 ◽  
Author(s):  
Mario D'Aniello ◽  
Gaetano Della Corte ◽  
Federico M. Mazzolani ◽  
Adolfo Santini ◽  
Nicola Moraci
Keyword(s):  
Experimental Tests ◽  
Buckling Restrained Braces ◽  
Real Building

Experimental Tests for Pre-Qualification of a Set of Buckling-Restrained Braces

2018 ◽  
Vol 763 ◽  
pp. 450-457 ◽  
Author(s):  
Aurel Stratan ◽  
Ciprian Ionut Zub ◽  
Dan Dubină
Keyword(s):  
Experimental Tests ◽  
Experimental Program ◽  
Design Parameters ◽  
Gap Size ◽  
Braced Frames ◽  
The Core ◽  
Cyclic Behaviour ◽  
Structural Fuse ◽  
Buckling Restrained Braces ◽  
Buckling Restrained Braced Frames

Buckling restrained braces are increasingly used as structural fuse elements due to their stable and quasi-symmetric cyclic behaviour and capacity to dissipate a large amount of energy. However, a wider adoption of buckling restrained braced frames is often precluded by the proprietary character of most buckling restrained braces, need for their experimental qualification and sometimes lack of experience of designers. To overcome these problems, a set of typical buckling restrained braces were developed in view of their pre-qualification. Both "conventional" and "dry" devices were considered, with capacities corresponding to typical steel multistorey buildings in Romania. Detailing of buckling restrained braces aimed at investigating the core aspect ratio, gap size, strength of the buckling restraining mechanism, and the unbonding material. The paper presents the results of the experimental program, and recommended design parameters of qualified specimens.

Randomized Experimental Tests of Mediation Models

2011 ◽  
Author(s):  
Charles E. Lance ◽  
Richard P. DeShon ◽  
Eugene Stone-Romero
Keyword(s):  
Experimental Tests ◽  
Mediation Models

Avalanche Stratification - Experimental Tests of the “Metastable Wedge” and “Continuous Flow” Models

2000 ◽  
Vol 627 ◽  
Author(s):  
M. E. Swanson ◽  
M. Landreman ◽  
J. Michel ◽  
J. Kakalios
Keyword(s):  
Continuous Flow ◽  
Granular Media ◽  
Experimental Tests ◽  
Coarse Sand ◽  
Angle Of Repose ◽  
Flow Models ◽  
Maximum Angle ◽  
Stratification Effect ◽  
Upward Moving ◽  
Moving Layer

ABSTRACTWhen an initially homogeneous binary mixture of granular media such as fine and coarse sand is poured near the closed edge of a “quasi-two-dimensional” Hele-Shaw cell consisting of two vertical transparent plates held a narrow distance apart, the mixture spontaneously forms alternating segregated layers. Experimental measurements of this stratification effect are reported in order to determine which model, one which suggests that segregation only occurs when the granular material contained within a metastable heap between the critical and maximum angle of repose avalanches down the free surface, or one for which the segregation results from smaller particles becoming trapped in the top surface and being removed from the moving layer during continuous flow. The result reported here indicate that the Metastable Wedge model provides a natural explanation for the initial mixed zone which precedes the formation of the layers, while the Continuous Flow model explains the observed upward moving kink of segregated material for higher granular flux rates, and that both mechansims are necessary in order to understand the observed pairing of segregated layersfor intermediate flow rates and cell separations.

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