首页 | 本学科首页   官方微博 | 高级检索  
     

高温下不同比例钢筋混凝土柱力学性能相似性有限元分析
引用本文:蔡新江,夏玮超,毛小勇,田石柱.高温下不同比例钢筋混凝土柱力学性能相似性有限元分析[J].工程力学,2022,39(1):129-138.
作者姓名:蔡新江  夏玮超  毛小勇  田石柱
作者单位:1.苏州科技大学土木工程学院,江苏,苏州 215011
基金项目:国家自然科学基金项目(51778395)%江苏省自然科学基金项目(BK20171221)%江苏高校“青蓝工程”项目(2018)%江苏省“333工程”项目(2018)%江苏高校优势学科建设工程资助项目(PAPD)
摘    要:为研究高温下缩尺模型和足尺模型力学性能的相似性,力求通过缩尺模型结果反推得到足尺模型的耐火性能,设计12根钢筋混凝土柱的足尺模型,并基于相似理论建立对应的2/3、1/2和1/3缩尺模型,同时,根据缩尺比调整各组缩尺模型的实际升温曲线、轴力和位移加载速率,并基于ABAQUS软件对各组模型进行耐火性能分析,对比各组原型化的缩尺模型和足尺模型的高温力学性能。研究结果表明:通过调整结构相似关系、时间相似关系和温度场相似关系,经过原型化的缩尺模型和足尺模型的截面温度分布、柱顶轴向位移、耐火极限和极限承载力均具有较好的相似关系,即通过缩尺模型柱可以相对较为准确地反映足尺模型柱的耐火性能。

关 键 词:钢筋混凝土柱    耐火性能    相似理论    缩尺模型    耐火极限
收稿时间:2020-12-09

FINITE ELEMENT ANALYSIS OF MECHANICAL PROPERTIES SIMILARITY OF REINFORCED CONCRETE COLUMNS WITH DIFFERENT PROPORTIONS DUE TO HIGH TEMPERATURE
CAI Xin-jiang,XIA Wei-chao,MAO Xiao-yong,TIAN Shi-zhu.FINITE ELEMENT ANALYSIS OF MECHANICAL PROPERTIES SIMILARITY OF REINFORCED CONCRETE COLUMNS WITH DIFFERENT PROPORTIONS DUE TO HIGH TEMPERATURE[J].Engineering Mechanics,2022,39(1):129-138.
Authors:CAI Xin-jiang  XIA Wei-chao  MAO Xiao-yong  TIAN Shi-zhu
Affiliation:1.Department of Civil Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215011, China2.Jiangsu Key Laboratory of Structural Engineering, Suzhou University of Science and Technology, Suzhou, Jiangsu 215011, China
Abstract:In order to study the similarity of mechanical properties between a scale model and a full-scale model due to high temperature, and to obtain the fire resistance of the full-scale model through the results of the scale model, the full-scale model of 12 reinforced concrete columns is designed, and the corresponding 2/3, 1/2 and 1/3 scale models are established based on the similarity theory. The actual heating curve, axial force and displacement loading rate of each scale model are adjusted according to the scale ratio. The fire resistance of each model was analyzed based on ABAQUS, and the high-temperature mechanical properties of the scale model and the full-scale model were compared. The results show that: by adjusting the structural similarity, time similarity and temperature field similarity, the section temperature distribution, the axial displacement at the top end of a column, the fire resistance and ultimate bearing capacity of the scale model and of the full-scale model have good similarity, and the fire resistance of the full-scale model of a column can be relatively accurately obtained through the scale model of the column.
Keywords:reinforced concrete column  fire resistance  similarity theory  scale model  fire-resistance limit
本文献已被 维普 万方数据 等数据库收录!
点击此处可从《工程力学》浏览原始摘要信息
点击此处可从《工程力学》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号