摘要
为了研究混凝土强度、非粘结区域长度对化学植筋性能的影响,利用大型有限元软件ABAQUS建立了单筋拉拔有限元分析模型,将混凝土强度设为C15, C20和C30三种不同强度等级,通过有限元数值模拟,分析了混凝土强度对植筋性能的影响。此外为了研究部分粘结化学植筋非粘结长度对低强度混凝土化学植筋性能的影响,非粘结区域长度分别取1d、2d、3d和4d,进行有限元计算,分析结果表明,非粘结区的存在可以避免化学植筋发生混凝土锥体破坏,从而提高混凝土化学植筋承载力,非粘结区长度取为4d较为合适。
In order to study the effect of concrete strength and unbonded area length on the performance of chemical rebars, a finite element analysis model of single bar drawing was established by using the large finite element software ABAQUS. The strength of concrete was set to three different strength grades of C15, C20 and C30, and the strength of concrete was analyzed by finite element numerical simulation. Influence. In addition, in order to study the effect of the non bond length of partially bonded chemically planted bars on the properties of low strength concrete, the length of the unbonded area is 1d, 2d, 3d and 4d respectively, and the finite element calculation was carried out. The results
show that the existence of non cohesive zone can avoid the damage of the concrete cone in the chemical rebars and thus improve the concrete. The bearing capacity of chemically bonded steel bar and the length of non bonding zone are more suitable for 4d.
作者
景剑
强峰
施凯
JING Jian;QIANG Feng;SHI Kai(Jiangsu Testing Center for Quality of Construction Engi.Co.,Ltd.,Nanjing 210008,China;College of Civil and Transportation Engi.,Hohai Univ.,Nanjing 210098,China)
出处
《低温建筑技术》
2018年第10期30-34,共5页
Low Temperature Architecture Technology
关键词
化学植筋
混凝土损伤塑性模型
粘结强度
chemical rebar planting
concrete damage plasticity model
bond strength
