摘要
结合滇中引水工程某倒虹吸钢管的实际,采用1∶1大比尺结构模型试验,研究了Q460C高强钢应用于水利水电行业大直径输水钢管时的受力状态及极限承载能力,得到水压试验模型从加压到最后爆破整个过程中钢管应力、位移的变化规律。模型试验测试结果表明,在水压试验压力2.82 MPa之前,钢管应力/应变~压力、位移~压力曲线呈现良好的线性关系,且其最大应力均小于Q460C钢材在水压试验工况下的允许应力,说明压力钢管处于弹性工作状态,结构能够满足强度设计要求。模型爆破时最大压力为7.50 MPa,是设计压力2.26 MPa的3.3倍,且产生了很大的塑性变形,说明Q460C钢制成的压力钢管具有很好的韧性和足够的安全裕量,可以应用于滇中引水工程或类似工程的倒虹吸钢管结构。
Combined with an inverted siphon pipe in the Water Diversion Project in Central Yunnan,the research on high strength steel Q460C to be used in the industries of water resources and hydropower is carried out through a 1∶1 large scale model test.The stress state and ultimate bearing capacity of the large diameter water pipe,as well as the changing law of stress and displacement during the water pressure varying from zero to the end of the blasting are obtained.Model test results show that before the hydrostatic test pressure 2.82 MPa,steel pipe stress/strain~pressure and displacement pressure curve show a good linear relationship,and the maximum stress is less than Q460C steel allow stress under the working condition of hydraulic pressure test,and the penstock works in an elastic state and can meet the requirements of strength design.The maximum blasting pressure of the model is 7.5 MPa,which is 3.3 times of the design pressure of 2.26 MPa,and a large plastic deformation is produced.It shows that the penstock made of Q460C steel has good toughness and enough safety margin,and can be applied to the inverted siphon steel pipe structure of the water diversion project in central Yunnan or similar projects.
作者
伍鹤皋
李端正
王涛
乔鹏飞
李天兴
WU He-gao;LI Duan-zheng;WANG Tao;QIAO Peng-fei;LI Tian-xing(State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei Province,China;The Third Engineering Co.,Ltd.of China Railway Seventh Bureau Group Corporation,Xiʹan 710000,Shaanxi Province,China;Power Industry Metal Structure Equipment Quality Testing Center,Zhengzhou 450000,Henan Province,China)
出处
《中国农村水利水电》
北大核心
2023年第7期183-188,194,共7页
China Rural Water and Hydropower
基金
云南省重大科研专项计划项目(202102AF080001)。
关键词
滇中引水工程
Q460C钢
水压试验
应力应变
爆破压力
central Yunnan water diversion project
Q460C steel
hydrostatic test
stress strain
burst pressure
作者简介
伍鹤皋(1964-),男,教授,研究方向为水电站压力管道。E-mail:wbf1988@vip.sina.com。
