不同粘钢加固的钢筋混凝土框架节点破坏机理研究

现有钢筋混凝土框架结构中梁、柱、节点因设计不当或施工事故，发生梁、柱、节点不能满足强柱弱梁、强节点弱构件的抗震设计原则，针对强柱弱梁、梁弱弯弱剪、梁纵筋锚固不足等４个节点试件进行了低周反复加荷对比试验，从破坏过程分析了梁、柱、节点核心区不同粘钢加固方案的效果。试验结果表明：粘钢加固对提高构件强度、改变框架破坏机制及增加变形能力具有良好的效果。并全面地分析了试件加固方案的优劣，初步给出了粘钢加固节点的构造措施和更合理的加固方法。

EXPERIMENTAL STUDY ON FAILURE MECHANISMS OFBEAM COLUMN NODAL CORE SECTIONS OF VARIOUSSTICKY STEEL REINFORCEMENT METHODS

, Because of design or constructional accidents of beam column nodes in present reinforced concrete frame structures,cases that beam column nodes can′t satisfy the seismic design principles of strong column weak beam and strong node weak member occur,comparative tests of low fregnency cyclic reverse loading on four nodal members which are strong column weak beam,have weak bending and shear beams,and have beams with insufficiently anchored longitudinal bars are given in the paper.Effects on beam column nodal core sections of various sticky steel reinforcement methods are investigated from failure mechanisms of different members. The experimental results indicate that sticky steel reinforcement is effective in improving failure mechanism of frame and increasing deformation capacity.