2016年11月上第45卷第21期
D0I:10.7672/sgjs2016210009
施工技术
CONSTRUCTION TECHNOLOGY
钢筋混凝土框架接梁后锚固节点抗震性能研究
王永泉'，韦芳芳，翟丽华2，张军3
(1.河海大学水利水电学院，江苏南京210098；2.南通市规划设计院有限公司，江苏南通226601；
3.江苏中南建筑产业集团有限责任公司，江苏南通226100)
【摘要］为研究建筑改扩建对混凝土框架梁柱节点抗震性能的影响，以实际框架结构为原型，制作了缩尺比例为 1:2的3个接架后镭固节点试件，包括2个框架结构中间层边节点和1个框架顶层边节点的接梁后错固，中间层边节点新增梁做法为直接植筋且增设短钢筋法和增设钢抱箍焊接新增梁主筋法，框架顶层边节点新增梁柱构件均采用直接植筋法。为便于对比分析，同期制作了一个相同缩尺比例的整浇中间层十字节点。通过试验研究和数值模拟，研究了4个节点试件在低周反复荷载作用下的抗震性能。数值模拟分析表明，节点简化数值模型能够分析节点受力的基本规律，但因节点区的加固改造较为复杂，实际节点的状态很难精确模拟，节点延性和耗能能力的数值模拟结果偏大
【关键词】钢筋混凝土；框架接梁；后锚固；节点；有限元分析；抗震性能
【中图分类号］TU375
【文献标识码】A
[文章编号】1002-8498(2016)21-0009-06
Seismic Performance Study for Post-installed Joint in Beams Connected
with Reinforced Concrete Framework
Wang Yongquan',Wei Fangfang',Qu Lihua"，Zhang Jun
(1. College of Water Conserrancy and Hydropower Engineering, Hohai Uninersity, Nanjing, Jiangsu 210098, Chind;
2. Nanfong City Planning and Design Institude Co. , Lad. , Nantong, Jiangsu226601, China 3. Jiangsur Zhongnan Architectare Indastry Group Go. , Lad. , Nantong, Jiangsu 226100, China)
Abstract : Aiming at the impaction on seismic behavior of concrete frame beam-column joints after post-install process, four test specimens made by proportion of 1 : 2 are under quasi-static test and finite element numerical simulation. These four joints are respectively made from a premade cross beam-column joint specimen, a top cormer beam-column joint made by the method of planting reinforcing bars, two mid-level-side joints made by the method of adding shorter reinforcements on the base of planting reinforcing bar and welding the installed bar on the steel plate which is around the longitudinal reinforcing bar of the existing beam or column ( WSP). It observes the destruction process of specimens and compare bearing capacity and ductility properties of different post-install method. The numerical simulations show that the simplified joint numerical model can analyze fundamental laws of joints, but due to complicated reinforcement of joints , the actual joint status is difficult to accurately simulate, and the simulation values for ductility and energy dissipation capacity are larger.
Key words: reinforcement concrete; beam connected with framework; post-installed; joints; finite element analysis; seismic performance
0引言
建筑物的接梁扩建是旧建筑改造的一个主要方向。本文采用3种节点的后锚固接梁方法：钻孔 +国家自然科基金项目（51409084）；江苏省自然科学基金项目(BK20130836)
[作者简介］王永泉，副教授，E-mail：wyq_hhu@hhu.edu.cn【收稿日期】2016-07-04
万方数据
9
植筋法、附加短钢筋和钢板焊接主筋法。对中间层边节点和顶层中节点进行多植入附加筋的钻孔植筋法和钢板焊接主筋法加梁，对项层边节点采用钻孔植筋法同时加梁和加柱，并且制作一个中间层中节点进行对比。钻孔植筋就是在原构件上定点钻孔，灌人植筋胶，植入新的主筋再浇筑混凝土。本法施工过程简单，运用广泛，但在植筋时，由于梁柱