陈以一  沈祖炎  郑沁宇  刘  鹏
    （同济大学建筑工程系钢结构研究室  上海 200092）

[提要]  在轻型钢结构建筑中采用的以单面角焊缝连接翼缘和腹板的组合H形截面钢构件，其焊缝接头性能尚未得到充分的试验验证。为此进行了两个基础性系列试验：对单面角焊缝接头的57个试件通过金相分析测定熔深，对26个试件进行焊缝抗剪试验。试验结果表明，在单调静力荷载条件下，单面连接角焊缝有良好的承载和变形性能，可以按照钢结构设计规范有关规定计算其没计承载力。
[关键词]  轻型钢结构  单面角焊缝熔深抗剪承载力

Thc propcrtics of the joints with onc-side fillct wcld connccting the wcbs to flangcs in H-shapcd stccl mcmbcrs uscd in light-wcight stccl structurcs, have not bccn yct thoroughly rcscarchcd by tcsts. Two basic cxpcrimcnts arc rcportcd. The dccpncss of the wcld root was mcasurcd by mctallographic cxamination on 57 picccs of samplcs, and the othcr 26 spccimcns whcre the wclds wcre subjcctcd to shcar forccs arc loadcd. The rcsults show that the joints with onc-side fillct wcld have sufficicnt Ioading capacity and dcformablility to shcar force undcr monotonic loading conditions, and the rcsistance of the wcld can be calculatcd by the provisions of the prcscnt dcsign spccification of the stccl structurcs.
Keywords:  light-wcight stccl structurc; onc-side fillct wcld; dccpncss; wcld root