港深西部通道钢箱梁低温CTOD试验  

LOW TEMPERATURE CTOD TEST ON STEEL BOX BEAM FOR HONG KONG-SHENZHEN WESTERN CORRIDOR

作　　者：苗张木[1] 吴卫国[1] 李书学[2] 郑自元[2] 谢智华[2] 李永信[1] 

机构地区：[1]武汉理工大学交通学院,武汉430063 [2]中铁大桥局集团第七工程公司,九江332004

出　　处：《钢结构》2005年第3期35-38,共4页Steel Construction

摘　　要：为有效控制大型钢箱梁焊接接头质量,运用裂纹尖端张开位移(CTOD)试验技术,按英国BS7448标准,对焊接接头进行低温(-20℃)韧性测定。评定了两种拟用焊接工艺:自动埋弧焊和手工电弧焊工艺,解决了港深西部通道后海湾大桥钢箱梁焊接接头韧性控制这个关键技术问题。介绍了CTOD的概念、试验方法、钢箱梁的低温CTOD试验过程及其结果。In order to ensure the quality of welded joints of steel box beam, th e low temperature(-20℃) toughness of welded joints have been evaluated by mean s of CTOD(Crack Tip Opening Displacement) test according to the British Standard BS7448. Automatic submerged arc welding procedure and manual arc welding proc edure have been evaluated. By doing so, the key problem has been solved to control the qua lity of fabrication of steel box beam of back gulf bridge for Hong Kong-Shenzhen w estern corridor. The concept of CTOD, the method of CTOD test, the low temperatu re CTOD test process of steel box beam and the results have been all presented i n this paper.

关 键 词：低温 通道 西部 钢箱梁 裂纹尖端张开位移 焊接接头 CTOD 手工电弧焊 自动埋弧焊 接头质量 有效控制 试验技术 焊接工艺 关键技术 海湾大桥 试验方法 试验过程 20℃ 韧性 

分 类 号：U441[建筑科学—桥梁与隧道工程]