摘要
目前化学植筋粘结性能数值模拟中界面单元均以双弹簧单元为主,但是模拟结果与相应的试验结果有较大偏差。为了提高数值模拟的精确度,本文基于双线性内聚力模型(Cohesive Zone Model)进行了单筋拉拔试验的有限元模拟,采用双线性应力-张开位移模型定义内聚力单元本构关系,进行了参数分析,得到了内聚力参数对计算结果的影响规律,并对一些试验的荷载-位移曲线进行参数拟合以确定合理参数,从而验证了该植筋模拟方法的有效性。
At present, numerical simulation of bond behavior of chemically bonded bars is mainly based on double spring elements, but the simulation results are quite different from the corresponding experimental results. In order to improve the accuracy of numerical simulation, the finite element simulation of the single bar drawing test based on the bilinear cohesive force model（Cohesive Zone Model）was carried out. The constitutive relationship of cohesion unit was defined by the bilinear stress open displacement model, and the parameter analysis was carried out. The influence of the cohesion parameters on the calculation results was obtained, and the load displacement curves of some tests were entered. Row parameter fitting was used to determine reasonable parameters, which verifies the effectiveness of the embedded bar simulation method.
作者
景剑
强峰
施凯
JING Jian1, QIANG Feng2, SHI Kai1(1.Jiangsu Testing Center for Quality of Construction Engi. Co., Ltd., Nanjing 210008, China;2.College of Civil and Transportation Engi., Hohai Univ., Nanjing 210098, Chin)
出处
《低温建筑技术》
2018年第7期57-60,64,共5页
Low Temperature Architecture Technology
关键词
化学植筋
单筋拉拔试验
内聚力模型
参数分析
chemical rebar planting
single tensile test
cohesive force model
parameter analysis
作者简介
景剑（1991-）,男,江苏南通人,硕士研究生,从事结构检测、监测工作.
