增加非预应力筋的混凝土管桩抗弯抗剪性能研究  

RESEARCH ON FLEXURAL AND SHEAR BEHAVIOR OF PRESTRESSED CONCRETE PIPE PILE WITH NON PRESTRESSED REINFORCEMENT

作　　者：徐金[1,2] 何晶[1] 

机构地区：[1]河北工业大学土木工程学院,天津300400 [2]中国民航大学机场学院,天津300300

出　　处：《工业建筑》2016年第10期109-112,130,共5页Industrial Construction

摘　　要：预应力混凝土管桩抗压承载力很高,但是抗拔和抗水平承载力不足。当管桩内部的钢筋都为预应力钢筋时,当管桩受拉、钢筋同时达到屈服强度时,很容易发生脆性断裂。通过在管桩内适当增加非预应力钢筋,即可增强管桩的抗弯抗剪性能,为此,分析了增加不同直径的非预应力钢筋对预应力管桩的抗弯抗剪性能影响。通过试验与ANSYS数值模拟方法的对比,结果表明:随着增加非预应力钢筋配筋的增大,开裂弯矩和开裂剪力逐渐减小,极限弯矩逐渐增加。The compressive bearing capacity of prestressed concrete pipe pile is very high,but its tensile property and flexural and shear bearing capacity are relative low. The internal reinforcement of a pipe pile is the prestressed reinforcement,when the pipe pile is under tension,the rebars reach the yield strength,which will easily produce brittle fracture of the pipe pile. It was tried to improve the bearing capacity of flexural and shear for pipe pile by adding non prestressed reinforcement,and analyze the influence of the different reinforcement ratio of non prestressed reinforcement on flexural and shear behavior of prestressed pipe pile. Through the experimental and ANSYS numerical simulation method for comparative study,the research results showed that with the increase of non prestressed rebar ratio,cracking moment and cracking shear gradually reduced,ultimate bending moment increased.

关 键 词：预应力管桩 抗弯 抗剪 

分 类 号：TU473.1[建筑科学—结构工程]