(1 同济大学地下建筑与工程系  上海 200092； 2 重庆交通学院河海系  400074)
【提要】  通过四根后张预应力混凝土靠船桩的试验，并结合有限元分析计算，研究了张拉控制应力、混凝土强度、配筋率等对靠船桩的裂缝形态、裂缝闭合性能的影响。结果表明，采用高强度材料的预应力混凝土靠船桩作为码头的防冲设施是经济可行的，良好的裂缝闭合性能有助于提高靠船桩的耐久性。在试验和理论分析计算的基础上，对预应力混凝土靠船桩的张拉控制应力、混凝土强度等提出了设计建议。
【关键词】  后张预应力  靠船桩  应变能  试验研究
Test Research on Crack Resistance Properities of Poststressed Concrete Berthing Pile/Tu Zhongren1,2,Xu Xibin2(1 Department of Underground Engineering,Tongji University,Shanghai 200092,China;2 Department of River & Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China)
Abstract:By testing on the characteristics of four prestressed concrete berthing piles and theoretical calculations,the influence of some parameters such as initial tensile stress,strength of concrete and ratio of reinforcing bar on the berthing pile is discussed.The results show that it is economical and feasible to adop the poststressed concrete berthing pile to prevent the dock from impacting,and that the dock durability can be improved greatly.Based on the results,some suggestions for further application are given.
Keywords:prestressed concrete;berthing pile;strain energy;experimental research