西南交通大学学报2011，Vol.46Issue(3)：365-372,8.DOI:10.3969/j.issn.0258-2724.2011.03.002
带肋钢筋与混凝土粘结性能的细观数值模拟
Mesoscopic Numerical Simulation of Bond Behavior of Ribbed Bars and Concrete
摘要
Abstract
In order to research the failure mechanism of bond between ribbed bars and concrete and discuss the influence of rib outline on bond behavior at a meso-level, a 3-D mesoscopic numerical model for reinforced concrete was established with ANSYS parametric design language. This model is based on a mesoscopic model for concrete and considers bars, and elements of each mesoscopic phase are generated by refining interface elements and distinguishing material properties. Two numerical models for pullout specimens for crescent-ribbed bar or screw thread bar were established respectively, and their bond failure processes were simulated. The damage and fracture region of concrete and the stress state of ribs were analyzed. The results show that the bond strength between a crescent-ribbed bar and concrete is slightly lower than that between a screw thread bar and concrete, but the stress concentration in concrete between crescent-ribbed bar's ribs is low and the damage degree is light. The simulated bond stress and bar slippage are approximate to their experimental values to show that the proposed numerical model can be used to research on bond behavior between bars and concrete.关键词
带肋钢筋/混凝土/粘结性能/损伤/细观数值模型Key words
ribbed bar/ concrete/ bond behavior/ damage/ mesoscopic numerical model分类
建筑与水利引用本文复制引用
王海龙,李朝红,徐光兴..带肋钢筋与混凝土粘结性能的细观数值模拟[J].西南交通大学学报,2011,46(3):365-372,8.基金项目
河北省科技攻关资助项目(09275628D) （09275628D）
