工艺与制造英文2026被引 2
表面处理3D打印FRP筋与混凝土的粘结性能研究
Bond behavior between surface-treated 3D-printed FRP bars and concrete
Zi-Tong Yan, Xianwen Hu, Jie-Kai Zhou, Yan Zhuge, Jun-Jie Zeng · Guangdong University of Technology
摘要整理
本研究针对3D打印纤维增强复合材料(3DP-FRP)筋的粘结性能进行了系统研究。开发了锯齿形3D打印FRP筋,其粘结强度达7.3 MPa。通过螺旋缠绕和粗砂涂层处理的3D打印FRP筋表现出最高的粘结强度。研究表明,粘结强度随混凝土强度增加而提高,但随锚固长度和筋径增大而降低。采用拉拔试验对33组试件进行了测试,系统研究了表面处理方法、混凝土强度、锚固长度和筋径对3DP-FRP筋粘结性能的影响。未经处理的3DP-FRP筋粘结强度(沿粘结长度的最大平均剪应力)可达7.3 MPa,明显超过光滑拉挤筋。螺旋缠绕粗砂涂层(HWCS)处理的筋具有最优粘结性能。修正的BPE(mBPE)模型能有效描述3DP-FRP筋的粘结-滑移行为。基于表面粗糙度参数建立的粘结强度预测模型,其决定系数R²=0.93,具有较好的预测精度。该研究为3D打印FRP筋在混凝土结构中的应用提供了重要的设计依据。
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