马哲昊 张纪刚 梁海志 李芦钰

摘 要：为提高装配式钢筋混凝土框架结构的抗震性能，针对震后梁、柱构件损伤严重等问题，提出了一种新型框架梁端构造——人工消能塑性铰，即在框架梁端通过预埋机械铰实现梁、柱构件铰接，同时安装附加钢板承载并耗能。设计制作了8组不同截面形式和构造的附加钢板试件，并对装有不同附加钢板的人工消能塑性铰构造进行低周往复荷载试验，研究该构造的破坏模式，并通过滞回曲线、骨架曲线、等效粘滞阻尼系数、延性等研究其抗震性能。结果表明：塑性损伤可控制在附加钢板中间开缝段，有效利用钢板弯曲变形实现耗能，使该构造具有损伤可控和损伤构件可更换，其中，卷边槽型附加钢板可防止耗能段钢板过早屈曲并提高耗能能力。

关键词：人工塑性铰;框架结构;拟静力试验;附加钢板;滞回曲线

中图分类号：TU375.4 文献标志码：A 文章编号：2096-6717（2021）03-0059-08

Abstract： To enhance the seismic performance of precast-reinforced concrete frame structure， and aim at the severe damage of beam and column members after earthquake， an innovative construction at beam end called artificial dissipative plastic hinge （ADPH） is proposed. ADPHs are constructions that connect precast beam and column though an embedded mechanical hinge， and additional steel plates are installed to carry the load and dissipate energy. Eight groups of additional steel plate specimens with different sections and structures were designed and fabricated. The low-reversed loading tests are carried out on the artificial dissipative plastic hinge structures with different additional steel plates， the failure modes are analysed， and the seismic performance of ADPH are studied through the hysteresis curves， skeleton curves， equivalent viscous damping coefficient and ductility. The results show that the plastic damage will concentrate only on middle part of steel plates， and prove the effectiveness of energy dissipation by bending， ADPH construction possesses the features of damage-control and rapid-replacing， and the U-shape steel plates could enhance the capacity of buckling-delayed and energy-dissipating.

Keywords： artificial plastic hinge; frame structure; quasi-static test; additional steel plates; hysteresis curves

隨着中国进入高质量发展的阶段，装配式建筑因其环保、高效等特点将成为未来建筑发展的主流形式。其中，装配式混凝土框架结构传力途径清晰，装配效率高，是近年来应用发展较快的装配式建筑体系之一[1]，但仍面临一系列挑战，相较于传统现浇框架结构，装配式混凝土框架节点的整体性相对不足，导致其对于抗震性能的需求更高。因此，许多学者提出了多种适应装配式特点的抗震框架节点形式，并对此展开研究，包括通过预应力筋[2-5]、螺栓连接及焊接连接等[6-9]方式的梁柱节点。……