自复位耗能支撑研究综述与展望

State-of-the-art on self-centering energy dissipative braces

自复位耗能支撑具有良好的复位和耗能能力,能够控制结构地震响应、减小结构震后残余位移角,同时为结构提供附加耗能能力,降低主体结构的损伤。自复位耗能支撑凭借其抗震性能优越和施工安装便捷等特点,成为可恢复功能结构的研究热点之一。在回顾了自复位阻尼器装置研究的基础上,阐述了初代自复位耗能支撑的基本组成和工作原理,总结其相关试验研究。以改善初代自复位耗能支撑的工作性能为目标,归纳了近10余年自复位耗能支撑在提高轴向伸长能力、创新耗能装置、降低预应力水平三个方面的研究进展和成果,分析了目前存在的动力可靠性和不确定性研究不足、滞回性能有待进一步改善、复位材料使用受限等问题,并指出自复位耗能支撑的未来研究方向。

Self-centering energy dissipative braces have good abilities of re-centering and energy dissipation,which can decrease the damage of the main structures by controlling the structural seismic response,eliminating the residual drifts after earthquakes and providing additional energy dissipative capacity for structures.Due to their superior seismic performance and convenient construction and installation,self-centering energy dissipative braces have become one of the research hotspots of earthquake resilient structures.On the basis of reviewing the research of self-centering damper devices,the concept and principle mechanism of the initial self-centering energy dissipative braces were described and the related experimental studies were summarized.The current research,which is focused on how to improve the performance of the initial self-centering energy dissipative braces,was summarized from three aspects:improving the axial elongation capacity,innovating energy dissipative devices and reducing the level of prestressing force.In addition,the existing problems of self-centering energy dissipative braces were proposed,such as insufficiency research on dynamic reliability and uncertainty,imperfect hysteretic performance and the limitation of re-centering materials.Finally,the future research trends of self-centering energy dissipative braces were pointed out.