预制装配式结构梁柱节点被动耗能减振技术研究现状及展望

State⁃of⁃the⁃art and Prospect of Prefabricated Beam⁃column Connection with Passive Energy Dissipation Technology

由于预制装配式建筑在高烈度地震区的抗震性能较差,限制了其推广使用。预制装配式框架结构作为一种常用的抗震体系,核心部位梁柱节点的连接是影响其抗震性能的主要因素。被动耗能减振技术作为一种成熟的结构振动控制技术应用于预制装配式结构中,可以显著提高结构的抗震性能。将耗能器放置于梁柱节点外部或者内部,既与节点形成新的整体部件,又实现自身被动耗能减振,形成“承载-耗能”双功能的新型节点。总结了目前常用的被动耗能减振技术中已经成熟的摩擦阻尼器和金属阻尼器复合形成的预制装配式结构梁柱节点,梳理了本课题组首次提出的预制梁柱耗能铰节点后的研究发展现状以及局限,提出了一种预制装配式结构梁柱摩擦-金属屈服两级耗能节点,形成了高性能预制装配建筑结构抗震体系,对提高我国装配式结构设计要求和推广装配式结构的实际工程应用,具有重要的参考意义。结合作者在该领域的研究工作和成果,给出了该领域的研究方向和未来的发展趋势。

Due to the poor seismic performance of prefabricated structures in high seismic regions,its popularization and application are limited.Precast concrete frame structure is a commonly used seismic system,and the beam-column connection is the crucial factor affecting its seismic performance.Pas-sive energy dissipation technology,as advanced structural vibration control technology,can signifi-cantly improve the seismic performance of prefabricated structures.The passive energy dissipated de-vice is placed outside or inside the beam-column joint,which not only forms a new integral part with the joint,but also realizes passive energy dissipation,thus forming a new type of dual-functional con-nection with load-bearing and energy-dissipation under seismic loading.The prefabricated beam-col-umn connections with frictional dampers or metallic dampers,and the energy dissipation hinges used in the beam-column connection are summarized.A prefabricated two stage energy-dissipated beam-col-umn connection combined rotational friction damper and flexural yielding metallic damper is put for-ward to form a high performance prefabricated structural seismic system,which has important refer-ence significance for improving the design requirements of prefabricated structures in China and popu-larizing the practical engineering application of prefabricated structures.The research direction and fu-ture development trends in this field are also given from the author’s point of view based on our recent research work and achievements.