循环荷载下大管桩抗裂性能试验研究  

Experimental study on crack resistance of large pipe pile under cyclic loading

作　　者：张洁[1] 郭云川 

机构地区：[1]中交上海三航科学研究院有限公司,上海200032 [2]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《水运工程》2017年第10期202-205,共4页Port & Waterway Engineering

基　　金：国家自然科学基金项目(51679081)

摘　　要：大管桩由于具有较高的极限、抗裂弯矩值,在基础工程中得到广泛应用。在近海工程中,由于桩基受到长期波浪、水流或靠船撞击等水平动力荷载,因此必须考虑大管桩的疲劳性能。通过循环荷载下的抗弯试验对D1200B32-2型大管桩进行抗裂性能研究,得到了试验样本的疲劳损伤变化并利用lgS-lgN曲线预测疲劳极限弯矩值,为大管桩的疲劳强度设计提供一定的参考。Because of the high limit and crack moment value, large pipe piles are widely used in foundation engineering. In offshore engineering, the fatigue performance of large pipe piles must be considered because of the horizontal dynamic load of the pile foundation subjected to long-term wave, current or ship impact.The anti-cracking performance of D1200B32-2 pipe piles is studied by the bending test under cyclic load.The fatigue damage of the test samples is obtained and the fatigue limit bending moment is predicted by lgS-lgN curve. It provides some reference for the design of fatigue strength of large pipe piles.

关 键 词：大管桩 循环荷载 抗裂性能 lgS-lgN曲线 

分 类 号：TU378[建筑科学—结构工程] U652[交通运输工程—港口、海岸及近海工程]