水利学报2017，Vol.48Issue(12)：1438-1446,9.DOI:10.13243/j.cnki.slxb.20170464
预应力钢筒混凝土管结构变形规律的原型试验研究I:内压
The prototype test study of prestressed concrete cylinder pipe structure deformation law I.The internal pressure
摘要
Abstract
PCCP is a composite structure composed ofconcrete core,steel cylinder,prestressed wire and mortar coating;the internal pressure is the key load during PCCP project running.To study the limit bearing capacity and failure mechanism of PCCP under theinternal water pressure,a prototype hydrostatic pressure test was carried out on 2.6 m diameter embedded PCCP(ECP).The test used BOTDA and FBG optical fiber sensor technology for the first time both at home and aboard,and the optical fiber implanted steel cylinder surface in the PCCP manufacturing process,continuously tested the strain of PCCP each layer structure in the process of loading.Through in-depth analysis of test data,it isfound that test PCCP stressed uniformly during internal pressure of 0 ～ 1.8MPa,the deformation of each structure layer is coordinated and jointly sustained the internal pressure,mortar coating and concrete core start crack when the internal pressure is greater than 1.8MPa,and both of cylinder and prestressed wire yield at the internal pressure of 1.8MPa.The full-scale testnot only obtained the loading response law of the PCCP layers structure under the internal water pressure,determined the cracking and yielding load of each layer structure,but also provided valuable experimental data for deeply basic theoretical research and engineering application of PCCP structure.关键词
预应力钢筒混凝土管/原型试验/BOTDA/FBG/承载力Key words
prestressed concrete cylinder pipe/prototype test/BOTDA/FBG/bearing capacity分类
建筑与水利引用本文复制引用
窦铁生,程冰清,胡赫,夏世法,杨进新,张奇..预应力钢筒混凝土管结构变形规律的原型试验研究I:内压[J].水利学报,2017,48(12):1438-1446,9.基金项目
国家自然科学基金项目(50979116) （50979116）
北京市科委重大专项课题(Z141100006014058) （Z141100006014058）
