基于SMA装置的框架-受控摇摆墙结构抗震性能试验研究

该文提出一种新型的框架-受控摇摆墙结构实现形式，由SMA装置代替传统的预应力筋实现摇摆墙体的受控约束，在墙体与基础之间安装V形铰接支座实现墙体的摇摆及提供竖向支撑，并在墙体与框架柱间安装耗能连接件增强摇摆结构的耗能能力。通过一个对比框架试件和一个基于SMA装置的框架-受控摇摆墙试件的低周往复试验，对比研究所提出的新型结构形式的抗震性能、破坏模式和自复位特性。试验结果表明：基于SMA装置的框架-受控摇摆墙结构的刚度和承载能力得到显著提高，提高幅度分别达到150%和103%；耗能连接件有效地发挥延性变形特性，使结构的滞回耗能能力显著提高，提高幅度达到183%，有效地减轻主体结构梁端、柱端以及梁柱节点区的损伤；所研发的SMA装置有效地实现了预设的工作机制，为摇摆墙体的自复位提供了恢复力；摇摆墙、耗能连接件和SMA装置的参数匹配还需进一步深入研究。

Experimental study on seismic performance of frame-controlled rocking wall structures using SMA devices

A new type of controlled frame-rocking wall structure form was proposed, in which the restraints were applied through SMA devices instead of the traditional implementation based on prestressing tendons. The V-shaped hinged support was installed between the wall and the foundation to realize the wagging and vertical support of the wall. Some energy-consuming connectors were installed between the rocking wall and the main frame to enhance the energy dissipation capacity. The seismic performance, failure mode and self-centering performance of compared frame structure and the frame-rocking wall structure using SMA device model were carefully investigated through the pseudo-static loading tests. Results showed that the stiffness and the bearing capacity of the controlled frame-rocking wall structure based on SMA device were improved significantly with the amplitude of 150% and 103%, respectively. The energy-dissipation connectors played important role in the ductility deformation, so that the hysteretic energy dissipation capacity of the structure was increased by 183%, and damage of the beam ends, column ends and beam-column joints was reduced effectively. The SMA device effectively achieved the preset working mechanism, which provided a certain restoring force for the resets of the rocking wall. The parameter matching between the rocking wall, the energy-dissipation connector and the SMA device needs further research.