碱性盐侵蚀球墨铸铁双法兰连接受弯性能试验  

FLEXURAL BEHAVIOR OF DUAL-FLANGED CONNECTION OF DUCTILE IRON PIPE UNDER ALKALI-SALT CORROSION ENVIRONMENT

作　　者：谷伟[1] 张延年[2] 公彦法 

机构地区：[1]嘉兴职业技术学院,浙江嘉兴314036 [2]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《工业建筑》2017年第6期174-177,共4页Industrial Construction

基　　金：国家"十二五"科技支撑计划项目(2012BAJ16B05);住房和城乡建设部科学技术项目(2015-K2-016);浙江省自然科学基金项目(LY14E080005)

摘　　要：为了解球墨铸铁管法兰连接在碱性盐侵蚀下的抗弯性能的变化状况,采用p H值为9的NaCl碱性氯盐溶液对球墨铸铁双法兰连接分别进行25、50、75、100次干湿循环的腐蚀处理,并对其进行受弯试验。结果表明:碱性盐侵蚀后的球墨铸铁管法兰连接更趋向脆性破坏,随着循环腐蚀次数增多,试件的弹性阶段逐渐缩短,试件极限弯矩与屈服弯矩的比值逐渐变小,其承载力和抗弯刚度也逐渐减小。In order to study the flexural behavior of flanged connection of ductile iron pipe under alkali-salt corrosion environment,the connection specimens were subjected to alkali-salt corrosion（ p H = 9） by wetting-drying cycle of 25 times,50 times,75 times and 100 times. The flexural experiment of specimens was carried out. The results showed that the failure mode of the corroded dual-flanged connection maily was brittle failure,the ultimate bending moment and yield moment ratio of the double flanged pipe interface was greater with the increase of wetting-drying cycle times,and with the increasing degree of corrosion,the bearing capacity and flexural stiffness showed a decreasing trend.

关 键 词：球墨铸铁管法兰连接 侵蚀环境 抗弯性能 加速腐蚀 承载力 

分 类 号：TU990.3[建筑科学—市政工程]