自复位预制框架边节点组件受力性能试验研究

发布时间：2018-02-16 07:50

本文关键词： 自复位角钢预应力组件抗震性能　出处：《工程力学》2014年03期 　论文类型：期刊论文

【摘要】：基于可恢复功能结构的理念,提出新型自复位预应力预制节点(PTED节点),该节点通过预应力筋和高强摩擦螺栓将预制梁、柱和耗能角钢拼接在一起形成节点,预应力筋、梁、柱和耗能角钢可看作节点的组件。为了研究节点组件对节点受力性能的影响,进行了系列的低周往复加载试验,首先对PTED边节点进行试验,研究PTED节点整体的抗震性能,然后用新角钢更换受损的角钢,重新对其进行低周往复加载,探讨更换受损角钢后节点的抗震能力,然后分别试验研究了预应力筋和角钢对节点的受力性能的贡献。试验结果表明PTED节点是PT节点与ED节点的组合,节点在具有较好的自复位能力的同时,还具有较好的耗能能力。节点层间位移角加载到4%时,梁、柱及预应力筋基本保持弹性,可重复使用;节点损伤主要集中在角钢上,更换受损角钢后,节点的抗震能力基本等同于未受损的节点。
[Abstract]:Based on the concept of recoverable functional structure, a new prestressing prefabricated joint with PTED joint is proposed. The prefabricated beam, column and energy-dissipation angle steel are joined together to form a joint, prestressing tendons, beams, and beams through prestressed tendons and high-strength friction bolts. Columns and energy-dissipation angle steel can be regarded as the components of the joint. In order to study the effect of the joint components on the mechanical behavior of the joints, a series of low-cycle reciprocating loading tests were carried out. First, tests were carried out on the PTED side joints to study the overall seismic behavior of the PTED joints. Then the new angle steel is used to replace the damaged angle steel, and the low cycle reciprocating loading is carried out again, and the aseismic capacity of the joint after the replacement of the damaged angle steel is discussed. The results show that the PTED joint is a combination of PT node and Ed joint, and the joint has good self-reset ability. It also has good energy dissipation capacity. When the displacement angle between the joints is loaded to 4, the beam, column and prestressed tendons are basically elastic and reusable. The damage of the joint is mainly concentrated on the angle steel, and the damaged angle steel is replaced. The seismic capacity of joints is equivalent to that of undamaged joints.
【作者单位】：淮海工学院土木工程学院;东南大学混凝土&预应力混凝土教育部结构重点实验室;南京理工大学土木工程系;
【基金】：江苏高校优势学科建设工程项目江苏省自然科学基金项目(BK20130408) 淮海工学院自然科学基金项目(Z2012004)
【分类号】：TU378

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