预应力钢筒混凝土管(PCCP)设计方法探讨.pdf

水利水电技术第36卷2005年第4期
预应力钢筒混凝土管(PCCP)设计方法探讨
张社荣,张彩秀,顾辉
(1天津大学建筑工程学院,天津300072
2水利部河北水利水电勘测设计研究院,天津300250
摘要】预应力钢筒混凝土管(PCCP)在输水过程中承受外荷载,在应力场作用下产生裂鏠,影响结
构的稳定性.根据美国规范 AWWA C.301、 AWWA C.304中的极限状态设计方法设计预应力钢筒混凝土
管,对所设计的PCCP管进行有限元模拟分析了PCCP管应力应变以及破坏机理,并比较了规范法和有
限元法的计算结果.为预应力钢筒混凝土管的设计提供计算分析参考
关键词】预应力钢筒混凝土管:极限状态设计方法;有限元
中图分类号:TU52873
文献标识码:B
文章编号:1000-0860(2005)04-0053-03
D iscu ssion on design of pre-stressed steel cy lindrical concrete ppe ( PCCP
NHANG She- rong MANG Cai-xiu GU Hui
1. School ofc ivil Eng ineer ing T ianj in Un i ers its T anjin 300072 Ch in 2 H ceir esearch Instite
of Invest ga tion and Design ofw ater Conserv ancy and H yropowei T anjin 300250 China
Abstract The prestressed tee I cy Iimdrica conc te pipe( P)endure exterior loads uring transferr ing w ater so it m ay
crack under the effects from the stress fieh possibly which will have an in pact on the stmcture of the pipe The des gn of a pre
st s steel y lidrial concree e is dius n aoran w th he cgn m chod as on hc li ited cond iion om th
stand ans of AWW A 301 and AW W A 304 fro the Am crean W atcrw orks A sociation herein and then the desiged p pe is
m ale ked w ith the m e tod of the fn ite e km ent ama si i wh ich both the stessstra in status and the destructive an im of th
p pe are ana zd and the cmar on is made been he calcu lation su Its from he method based on the stan da rd and the
n ethod of tc finite clam cnt ana lysis as we On the whol the d scuss ibn given herein prov ides a Ie cience for the ca lcu kton
and hc ana lysis in the design of the prc-stresscd stcel cy lind rical conci te p ipc
K ey words prestressed steel cy lindrical conc ete p ipe lin it des gn; fin ite elem ent ana ys
1PCCP管设计方法及设计成果
准则能满足.如果能满足计算结束.否则増大钢丝面
积重新计算,如果仍不能满足,则需要重新设定PCP
PCCP是种复合管材,关国规范 AWWA C301、管各部分的八计算.
AWWA C304中对PCCP管的设计方法为极限状态设1.1PCCP管基本参数
让法,此法主要考虑管壁単位圆环内巾内、外荷载、
现仪将工作柲限状念情況下,管芯内壁出现可见裂
管重和管内水重引起的极限轴力和弯矩,在具体设计缝准则的简要计算过程介绍如下.在荷载组个WT1
时,规定了种收限状态设讣准则:下.作枚限状态设计(WT1=静荷载+管子自重+流体自重+工作内压+
准则、弹性极限状态设准则、强度柲限状态设计准则.瞬时内压)条件下,设计?个可承受工作内Q.6MPa
根据枚限状忞设计方法,设计直径为4.0m、工作管4.0m的PCCP管.初选钢筒外径4.221m,包括钢
内水压力为0.6MPa的PCCP管,总的设计思路为:筒厚度在内的管芯总厚度0.303m;作内压0.6MPa
(1)假定PCCP管各组成部分的小,计算PCCP外荷
载;(2)选择各部分材料的设计参数;(3)计算预应力收稿日期:205-0-12
钢丝的最小面积;(4)判断各种荷载组个条件下各
作者简介:张社荣(1960-),男、教授、博
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