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Ongoing experimental programmes on RC walls reinforced with iron-based shape memory alloy rebars
Reinforced concrete (RC) construction plays, and will keep on playing for the next decades, a pivotal role in building safe and resilient cities in both developed and developing countries, due to the extraordinary properties that make it irreplaceable for countless infrastructure. Presently, RC walls are the backbone of millions of mid- and high-rise buildings around the world, primarily resisting the lateral loads from wind and earthquakes. Some recent large seismic events have led engineers to propose a revision to design performance objectives, which requires an evolution from the current “life safe” approach to seismic design. Engineers will progressively design for serviceable and operational building performance for rarer earthquake events, which is also linked to the expected increase in design service life. Yet, to achieve these targets, engineers will not only have to design for larger seismic loads, but also implement better structural technologies and materials. This paper presents some ongoing research at UCLouvain, Belgium, investigating the seismic performance of RC walls partially detailed with iron-based shape memory alloy (Fe-SMAs) rebars, with the central goal of minimizing residual displacements. The approaching large-scale shake-table test of a 40-ton RC wall is first introduced (results will be shown at the conference). Some preliminary results are then provided from a recent experimental investigation on material tests and RC prisms, detailed with Fe-SMA and steel rebars. Testing RC prisms representing wall boundary regions under uniaxial loading is a cost-effective and simplified approach to assess key failure modes of flexurally-dominated walls that has been adopted by many researchers. The RC prisms are detailed similarly to previous tests with conventional steel rebars, allowing for some direct comparisons with regards to residual deformations. Quasi-static cyclic tension-compression axial displacements are applied. State-of-the-art high-definition fibre optic sensing is used to ...
Ongoing experimental programmes on RC walls reinforced with iron-based shape memory alloy rebars
Reinforced concrete (RC) construction plays, and will keep on playing for the next decades, a pivotal role in building safe and resilient cities in both developed and developing countries, due to the extraordinary properties that make it irreplaceable for countless infrastructure. Presently, RC walls are the backbone of millions of mid- and high-rise buildings around the world, primarily resisting the lateral loads from wind and earthquakes. Some recent large seismic events have led engineers to propose a revision to design performance objectives, which requires an evolution from the current “life safe” approach to seismic design. Engineers will progressively design for serviceable and operational building performance for rarer earthquake events, which is also linked to the expected increase in design service life. Yet, to achieve these targets, engineers will not only have to design for larger seismic loads, but also implement better structural technologies and materials. This paper presents some ongoing research at UCLouvain, Belgium, investigating the seismic performance of RC walls partially detailed with iron-based shape memory alloy (Fe-SMAs) rebars, with the central goal of minimizing residual displacements. The approaching large-scale shake-table test of a 40-ton RC wall is first introduced (results will be shown at the conference). Some preliminary results are then provided from a recent experimental investigation on material tests and RC prisms, detailed with Fe-SMA and steel rebars. Testing RC prisms representing wall boundary regions under uniaxial loading is a cost-effective and simplified approach to assess key failure modes of flexurally-dominated walls that has been adopted by many researchers. The RC prisms are detailed similarly to previous tests with conventional steel rebars, allowing for some direct comparisons with regards to residual deformations. Quasi-static cyclic tension-compression axial displacements are applied. State-of-the-art high-definition fibre optic sensing is used to ...
Ongoing experimental programmes on RC walls reinforced with iron-based shape memory alloy rebars
Hoult, Ryan (Autor:in) / Saraiva Esteves Pacheco De Almeida, João (Autor:in) / UCL - SST/IMMC/GCE - Civil and environmental engineering
01.01.2024
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Ongoing experimental programmes on RC walls reinforced with iron-based shape memory alloy rebars
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