不平整基岩对预应力管桩竖向裂缝影响研究  

Study on the influence of uneven bedrock on vertical crack of prestressed pipe pile

作　　者：潘紫伟 王东[1] 张飞[1] 张乐 段铃铃 PAN Ziwei;WANG Dong;ZHANG Fei;ZHANG Le;DUAN Lingling(Faculty of Civil Engineering and Mechanics,Kunming University of Science and Technology,Kunming 650500,China)

机构地区：[1]昆明理工大学建筑工程学院,昆明650500

出　　处：《工业安全与环保》2022年第9期35-39,共5页Industrial Safety and Environmental Protection

摘　　要：结合工程实例,采用ABAQUS中扩展有限元法建立桩土模型,以最大主应力准则、最大能量释放率准则作为损伤机制,并考虑初始地应力的影响,通过分析在竖向荷载作用下,桩头的不同范围(桩头的1/2、1/3、1/4)作用于不平整基岩上预应力管桩所产生竖向裂缝的变化规律。Combined with the engineering examples,the pile-soil model is established by using the extended finite element method in ABAQUS,the maximum principal stress criterion and the maximum energy release rate criterion were used as the damage mechanism,and the influence of initial in-situ stress was considered. By analyzing the variation law of vertical cracks produced by different ranges of pile head(1/2,1/3 and 1/4 of pile head)acting on uneven bedrock of prestressed pipe pile under vertical load.

关 键 词：预应力管桩 竖向裂缝 最大主应力 有限元分析 

分 类 号：TU473.1[建筑科学—结构工程] TU45[建筑科学—土工工程]