1,721,039 research outputs found
Cyclic tests on bolted and welded beam-to-column connections
No full textSpecial Issue "Experimental Techniques
Cyclic tests on bolted and welded beam-to-column connections
No full textSpecial Issue "Experimental Techniques
Analise experimental do comportamento de vigas de betao renforcadas con varoes de fibra de vidro
No full textComparison of two cumulative damage approaches for the assessment of behavior factors for low-rise steel buildings
No full textU-shaped steel plate dissipative connection for concentrically braced frames
No full textIn concentrically braced frames, the use of dissipative connections allows to efficiently dissipate the seismic energy in earthquake scenarios and subsequently, to reduce the costs in the rehabilitation of the structure. To this end, U-shaped steel plates are simple and efficient connection components where significant dissipation of seismic energy can take place through the inelastic flexural deformation of the plate. This paper presents experimental results on the isolated U-shaped steel plate connections and on single-story concentrically braced frame (real scale) including the U-shaped steel plate to connect braces to adjacent members. The executed tests considered both monotonic and cyclic loading. The results highlight the efficiency of the U-shape steel plate to dissipate the energy input through inelastic deformations. On the other hand, the cyclic tests show potential fatigue behavior, as the deformation capacity is significantly reduced with repeated loading and increasing stress amplitude, requiring thus specific attention in practical design situations.The research leading to these results has received funding from the European Union’s Research Fund for Coal and Steel (RFCS) research programme under CEC agreement N° 7210-PR-316 (The INERD project) and the grant agreement N° 709343 (INNOSEIS).Henriques, J (corresponding author), Univ Hasselt, Fac Engn Technol, CERG, Hasselt, Belgium
Dissipative Replaceable Bracing Connections (DRBrC) for earthquake protection of steel and composite structures
No full textThe article describes the development of a novel dissipative bracing connection device (identified by the acronym DRBrC) for concentrically braced frames in steel and composite structures. The origins of the device trace back to the seminal work of Kelly, Skinner and Heine (1972), and, more directly related, to the PIN-INERD device, overcoming some of its limitations and greatly improving the replaceability characteristics. The connection device is composed of a rigid housing, connected to both the brace and the beam-column connection (or just the column), in which the axial force transfer is achieved by four-point bending of a dissipative pin. The experimental validation stages, presented in detail, consisted of a preliminary testing campaign, resulting in successive improvements of the original device design, followed by a systematic parametric testing campaign. That final campaign was devised to study the influence of the constituent materials (S235 and Stainless Steel, for the pin, and S355 and High Strength Steel, for the housing), of the geometry (four-point bending intermediate spans) and of the loading history (constant amplitude or increasing cyclic alternate). The main conclusions point to the most promising DRBrC device configurations, also presenting some suggestions in terms of the replaceability requirements
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