建筑钢结构熔透对接焊缝缺陷对焊缝抗拉承载力影响的研究  

Study on the influence of penetrated butt weld defects on weld tensile bearing capacity

作　　者：杨晓东[1,2] 雷艳春[3] 尚建丽[1,2] 岳鹏[1,2,4] 

机构地区：[1]西安建筑科技大学材料科学与工程学院,陕西西安710055 [2]西部建筑科技国家重点实验室(筹),陕西西安710055 [3]西安工业大学建筑工程学院,陕西西安710032 [4]西安建筑科技大学建筑学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2011年第5期730-734,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省教育厅自然科学专项(09JK558)

摘　　要：超声波探伤计算建筑钢结构熔透对接焊缝的缺陷率,对含有不同位置缺陷及缺陷率的焊缝进行拉力试验,用缺陷率-焊缝强度关系图分析焊缝抗拉承载力达到:母材强度,GB50017-2003一、二、三级熔透对接焊缝设计值,母材屈服强度标准值时,建筑钢结构熔透对接焊缝可允许存在的体积性缺陷率限值.研究结果表明:存在于熔透对接焊缝中部的缺陷,当缺陷率小于2.6%时,焊缝的抗拉强度大于母材的强度,当缺陷率小于8.0%时,焊缝的抗拉强度大于母材屈服强度标准值,当缺陷率小于25.5%时,焊缝的抗拉强度大于GB50017-2003一、二级熔透对接焊缝设计值,当缺陷率小于30.0%时,焊缝的抗拉强度大于GB50017-2003三级熔透对接焊缝设计值;存在于熔透对接焊缝根部的缺陷,当缺陷率小于11.0%时,焊缝的抗拉强度大于母材屈服强度标准值以及GB50017-2003一、二级熔透对接焊缝设计值,当缺陷率小于23.0%时,焊缝的抗拉强度大于GB50017-2003三级熔透对接焊缝设计值.In this paper the construction steel structure penetration butt weld defects are calculated through ultrasonic tes- ting and tension tests are made for welds containing defects in different positions. By the defect-weld strength relationship chart, the acceptable volume defect limits are analyzed when the weld tensile bearing capacity achieves mother materials strength, GB50017-2003 first, second and third penetration butt weld design value, yield strength of mother materials standard, respectively. In penetration butt welding, the results show that the central weld defect is less than 2.6 %, the weld tensile hearing capacity is greater than the mother materials strength. If the defect is less than 8.0 ~, the weld ten- sile hearing capacity is greater than yield strength of mother materials standard and if the central weld defects is legs than 25.5%, the weld tensile bearing capacity is greater than design value of Grade 1 and 2. When the central weld defects is less than 30%, the weld tensile bearing capacity is greater than the design value of Grade 3. In penetration butt welding root defect, if the defect is less than 11~, the weld tensile bearing capacity is greater than the yield strength of mother materials standard or design value of Grade 1 and 2, and if the defect is less than 23.0~, the weld tensile bearing capacity is greater than the design value of grade 3.

关 键 词：建筑钢结构 熔透对接焊 焊缝抗拉承载力 焊接缺陷 缺陷率限值 

分 类 号：TB441.7[一般工业技术]