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水平地震作用下,管桩与承台结合部要承受较大的弯矩和剪力的作用。通过对预应力混凝土填芯管桩在其与承台结合部位设置加强环,并采用拟静力试验的研究方法,对管桩在试验过程中的破坏机理、管桩的延性和刚度退化等抗震性能进行分析。试验表明,加强环的设置使填芯管桩在承载力、截面延性系数上都有了较大程度的提高。
Under the action of horizontal earthquake, the joint of pipe pile and cap plate has to bear the function of larger bending moment and shear force. Through strengthening the ring of the prestressed concrete filled core pipe pile in the joint with the cap, and using the research method of quasi-static test, the failure mechanism of the pile during the test, the ductility of the pile and the stiffness degradation Performance analysis. Experiments show that the strengthening of the ring set to make the core-filled tubular piles in bearing capacity, cross-sectional ductility coefficient has been greatly improved.