钢管混凝土界面粘结滑移性能

钢管混凝土界面粘结滑移性能的研究对于完善钢管混凝土设计理论和有限元分析模型具有重要意义。对钢管混凝土界面粘结滑移特点和研究现状进行了阐述,介绍了推出和推离两种试验研究方法以及国内外采用两种方法对钢管混凝土界面粘结强度的试验研究成果,总结比较了混凝土强度、钢管截面形状、钢管内表面状况及钢管混凝土构件受力状态对粘结强度的影响。针对钢管混凝土粘结滑移研究中存在的问题,着重分析了混凝土强度、收缩徐变、温度及构件受力状态等影响,并提出了钢管混凝土界面抗剪粘结力的组成、构件复杂受力状态下粘结性能、粘结滑移本构关系等需进一步研究的内容。

Bond-slip mechanics behaviors of structures concrete filled steel tubes

The study on bond-slip performance at the interface of structures concrete filled steel tubes(CFST) is very important to perfect the theory of CFST and the FEM analytical models.The characters and research situation of bond-slip performance at the interface of structures CFST are introduced,the push-out test and push-off test with the former research achievement are summarized.The factors, such as concrete strength,steel tube sections,steel tube inner face status and mechanics behaviors of members,which effect the bond-slip performance,are reviewed.On the basis of the existing investigation problems,particularly,the various factors influencing the bond-slip performance,including strength,shrinkage and creep of cocrete,temperature,mechanics behaviors of members,are analyzed.The investigation contents,including the composing of shear bond force,bond-slip performance under complex mechanics behaviors and constitutive relation of bond-slip,are presented.2 figs,24 refs.