火灾下高强钢端板连接节点力学性能有限元分析  

Finite Element Analysis on Behavior of High Strength Steel Endplate Connections in Fire

作　　者：强旭红[1] 任楚超 刘冰[3] 姜旭[1] 宋杰 QIANG Xuhong REN Chuchao LIU Bing JIANG Xu SONG Jie(College of Civil Engineering, Tongji University, Shanghai 200092, China Chongqing Vocational College of Transportation, Chongqing 402247, China Weifang People＇s Hospital of Shandong Province, Weifang 261599, China Shandong Provincial Academy of Building Research, Ji＇nan 250031, China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]重庆交通职业学院,重庆402247 [3]山东省潍坊市人民医院,山东潍坊261599 [4]山东省建筑科学研究院,山东济南250031

出　　处：《同济大学学报（自然科学版）》2017年第9期1273-1283,共11页Journal of Tongji University:Natural Science

基　　金：国家重点研发计划重点专项(2017YFB0304701);国家自然科学基金(51408150);中央高校基本科研业务费专项资金(2014KJ044)

摘　　要：为研究高强钢端板连接节点在火灾作用下的力学性能,对7个梁柱端板连接节点在550℃的火灾高温下进行足尺试验研究.依据试验结果,采用通用有限元件ABAQUS建立高强钢端板连接节点有限元模型,从网格划分、单元种类选择、接触定义、分析步设置以及失效准则的确定等方面详细介绍建立模型过程,并得到高强钢端板连接节点在火灾下和常温下的弯矩-转角关系曲线、破坏模式以及端板的应力分布和屈服线模式.同时,将有限元分析结果同试验研究结果进行对比校验,结果显示,该有限元模型具有足够精确性.In order to obtain the behavior of high strength steel endplate connections in fire, full-scale tests on 7 joints were conducted at elevated temperature 5500C. Based on the test results, a FEM analysis on high strength steel endplate connections under fire conditions was carried out by software ABAQUS. Details of the numerical modelling, such as mesh generation, element type, contact interaction, analysis process and failure criterion based on deformation, were presented. Herein the moment-rotation relationship, failure mode and stress state as well as yield line pattern of high strength endplate connections both at ambient temperature and in fire were revealed. Besides, the validations of the numerical modelling against all representative experimental results show that good agreements exist.

关 键 词：高强钢 端板连接节点 火灾 有限元分析 数值模拟 

分 类 号：TP15[自动化与计算机技术—控制理论与控制工程]