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Showing 1 to 7 of 7 for “"Active Confinement"”.
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Seismic retrofit and repair of reinforced concrete bridge columns using shape memory alloy spirals
… SMA spirals is utilized to apply large active confinement pressure at the column’s plastic hinge zone to enhance the flexural ductility of vulnerable columns and limit their post-earthquake damage. Although research has proven that concrete active confinement is a more superior technique …
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Probabilistic seismic demand models of RC bridge columns retrofitted with shape memory alloy spirals
… vulnerable RC bridge columns by applying lateral active confinement using shape memory alloy (SMA) spirals can significantly improve their ductility, resulting in enhanced seismic performance. The research work done till date in this area is limited to exploring experimentally the efficacy of this …
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Experimental testing and constitutive modeling of concrete confined with shape memory alloys
Concrete confinement has been proven to be effective in increasing concrete strength and ductility, which are essential characteristics for structures prone to extreme loading events, such as earthquakes. Andrawes and Shin (2008) first proposed the idea of using shape memory alloy (SMA) spirals to …
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Retrofit of deficient lap splice with post-installed anchors
… undercut anchors. These anchors function as active confinement in the splice region, potentially allowing members with inadequate lap splice lengths to reach the required design capacity. The solution presented in this thesis requires access to only one face of the reinforced concrete …
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Stress-Strain Behavior for Actively Confined Concrete Using Shape Memory Alloy Wires
… method using shape memory allow (SMA) wires to actively confine concrete members is discussed and further researched in great detail. This new confinement method utilizes a constant confining pressure that is a direct result to the SMA material being able to recover large inelastic strains with …
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Performance of shape memory alloy rehabilitated bridge columns under sequential earthquakes
… attention of industry and academia. Among many, active confinement technique using SMA’s shape memory effect (SME) demonstrated a great potential in retrofitting and/or repairing seismically deficient RC bridge columns. In order to gain recognition as an effective seismic retrofit/repair strategy …
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Rehabilitation and Strengthening of Reinforced Concrete Columns with Iron-Based Shape Memory Alloys
… out. In strengthening applications, such as confinement of concrete columns, the property of the SMA known as shape memory effect (SME) allows the application of an initial active confining pressure. Such technique does not require expansion to occur for the confining system to engage, hence …