不同粘钢加固的钢筋混凝土框架节点破坏机理研究

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

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。

, 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.