预应力钢丝应力对PCCP性能的影响分析  

Analysis of the influence of the Stress of Prestressed Steel Wire on Performance of PCCP

作　　者：滕海文[1,2] 张霄杰[1,2] 代春生[3] 

机构地区：[1]北京工业大学建筑工程学院,100124 [2]北京城市与工程安全减灾重点实验室,100124 [3]北京市市政工程设计研究总院,100082

出　　处：《特种结构》2013年第5期37-40,共4页Special Structures

摘　　要：预应力钢丝作为预应力钢筒混凝土管的受力要件之一,其应力状况对预应力钢筒混凝土管性能有重要影响。有限元分析表明,钢丝应力对管芯混凝土抗裂性能及管道结构延性性能有重要影响。结合管道结构受力情况,本文推导出预应力钢丝最大张拉控制应力一般公式,该应力值既能保证管体结构抗裂性能,又能使其具有延性性能。As one of the main stress components of prestressed concrete cylinder pipe （PCCP）, the stress condition of prestressed steel wire have great impact on the performance of PCCP. The finite-element analysis shows that ultra stretching have a great influence on the anti-cracking ability of core concrete and the ductility of the pipeline. Combine with the structural loading condition of the pipe, the formula of the maximum control stress for prestressing have been deduced in this paper This formula can be used to make sure the anti- cracking ability and ductility of the pipeline＇s structure.

关 键 词：预应力钢丝 超张拉 PCCP 最大张拉控制应力 有限元分析 

分 类 号：TU394[建筑科学—结构工程]