腐蚀后摩擦型耐候高强度螺栓连接抗滑移系数试验研究  

Experimental Research on Slip Factors of Corroded Slip-Critical Weathering High-Strength Bolted Connections

作　　者：兰涛 李泽旭 张博雅 高睿祥 尤勇 LAN Tao;LI Zexu;ZHANG Boya;GAO Ruixiang;YOU Yong(CSSC International Engineering Co.,Ltd.,Beijing 100121,China;Sichuan Provincial Architectural Design and Research Institute Co.,Ltd.,Chengdu 610041,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中国船舶集团国际工程有限公司,北京100121 [2]四川省建筑设计研究院有限公司,成都610041 [3]西南交通大学土木工程学院,成都610031

出　　处：《工业建筑》2023年第9期95-103,共9页Industrial Construction

基　　金：十四五国家重点研发计划项目(2022YFB3706400);中国船舶集团国际工程有限公司科技创新与研发项目(20MT01J)。

摘　　要：为研究腐蚀对耐候高强度螺栓抗滑移系数的影响规律,作者对经过喷砂和人工钢丝刷清理的23个高强度螺栓组成的连接试件进行了不同腐蚀时间下的抗滑移系数试验,包含10个由Q355GNH耐候钢和NHL10耐候高强度螺栓组成的连接试件,10个由Q355B普通钢和NHL10耐候高强度螺栓组成的连接试件,3个由Q355GNH耐候钢和ML20MnTiB普通高强度螺栓组成的连接试件,研究了不同表面处理方式、不同材质对耐候高强度螺栓连接抗滑移系数的影响。试验结果表明:表面处理方式对试件连接钢板的腐蚀率和腐蚀速度没有明显的影响;经喷砂处理的耐候高强度螺栓连接试件承载力高,抗滑移系数更加稳定;对于耐候钢板-普通高强度螺栓连接试件,由于腐蚀电位差的存在,耐候钢板腐蚀速度趋于稳定的时间被延长;在相同腐蚀时间下,耐候钢板-耐候高强度螺栓连接试件的抗滑移系数受腐蚀影响更小,更适用于严峻的腐蚀环境。To study the effect of corrosion on the slip factors of weathering high-strength bolts,the slip factor tests under different corrosion times were conducted on 23 high-strength bolted connecting specimens cleaned by sandblasting and manual cleaning.The test includes 10 specimens composed of Q355GNH weathering steel and NHL10 weathering high-strength bolts,10 specimens composed of Q355B ordinary steel and NHL10 weathering high-strength bolts,and 3 specimens composed of Q355GNH weathering steel and ML20MnTiB ordinary high-strength bolts.The effects of different surface treatments and materials on the slip factors of weathering high-strength bolted connections were studied.The test results showed that the surface treatment had no noticeable effect on the corrosion rate and speed of the steel plates;the bearing capacity of the weathering high-strength bolted connecting specimens after sandblasting was higher,and the slip factors were more stable;for the connecting specimens composed of weathering steel plates and ordinary high-strength bolts,due to the existence of corrosion potential difference,the time for the corrosion rate of weathering steel plates to stabilize was prolonged;at the same corrosion time,the slip factors of the specimens composed weathering steel plate and weathering high-strength bolts were less affected by corrosion,so the specimens would be more suitable for severe corrosion environments.

关 键 词：耐候钢 耐候高强度螺栓 连接试件 盐雾腐蚀试验 抗滑移系数 

分 类 号：TU391[建筑科学—结构工程]