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Shape memory alloy (SMA)-cable-controlled sliding bearings: development, testing,; system behavior
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DOI：10.1088/1361-665X/ab8f68.png)
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摘要
En 中文
This paper presents an innovative type of friction sliding bearing system incorporating shape memory alloy (SMA) cables. The study commences with cyclic tests on individual SMA cables to underst;
their fundamental mechanical properties. The working principle of the proposed SMA-cable-controlled friction sliding bearing (SMA-sliding bearing) is subsequently described, followed by physical tests on two SMA-sliding bearing specimens. The bearing specimens show rectangular hysteresis loops induced by Coulomb friction before the SMA cables are stretched,;
afterward the load resistance;
energy dissipation capacity of the bearings are increased accompanied by certain self-centering capability due to the engagement of the SMA cables. Such action is expected to effectively restrict excessive displacements of the bearings;
to help reduce the residual displacement. Following the experimental study, a theoretical model of the new bearing is developed;
numerical simulation is carried out. The theoretical;
numerical results agree very well with the experimental results. A case study focusing on a three-span continuous bridge subjected to pulse-like near-fault (NF) ground motions is subsequently conducted, where three types of bearing system, namely, conventional sliding bearing system, SMA-sliding bearing system,;
steel-cable-controlled (steel-sliding) bearing system are compared. The system-level analysis results show that the proposed SMA-sliding bearing has its superiority in superstructure displacement control, with a limited increase in the curvature ductility of the pier.
Keyword:
seismic resilience
shape memory alloy (SMA) cable
friction sliding bearing
bridge
experimental study
system-level analysis
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IF:
3.8
论文数:
8.5K
被引数:
2.5W
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