PCCP断丝数量对内压承载力的影响  

Influence of Number of Broken Wires in PCCP on Internal Pressure Bearing Capacity

作　　者：窦铁生[1,2] 胡赫[1,2] 杨进新[3] 夏世法[1,2] 张奇[3] 

机构地区：[1]中国水利水电科学研究院,北京100038 [2]水利部水工程建设与安全重点实验室,北京100038 [3]北京市水利规划设计研究院,100044

出　　处：《混凝土与水泥制品》2015年第7期35-37,共3页China Concrete and Cement Products

基　　金：国家自然基金项目(50979116);北京市科委重大专项办公室课题(Z141100006014058)

摘　　要：采用降温法模拟PCCP中预应力钢丝产生的预应力,通过调整降温值来控制钢丝中预应力的大小,在没有断丝的部位预应力值为一常量。针对0.6MPa和0.8MPa的工作内压,直径2.6m、3.2m和4m的PCCP分别设定不同的断丝率,通过三维有限元计算,研究了PCCP断丝数量对内压承载力的影响。The prestress of prestressed steel wires in PCCP are simulated by cooling method, the prestress is controlled by adjusting the cooling value, and the prestress value of the parts without broken wires is a constant. Under 0.6MPa and 0.8MPa working pressure and different broken wires rate, the relationship between the number of broken wires in PCCP with Ф2.6m, Ф3.2m and Ф4m and the internal pressure bearing capacity is studied by 3D finite element calculation.

关 键 词：PCCP 降温法 断丝率 承载力 

分 类 号：TU528.73[建筑科学—建筑技术科学]