论文部分内容阅读
一直以来,低温或动力荷载作用下冷弯矩形钢管(RHS)的缺口韧性是北美关注的问题之一。为了评估矩形钢管的缺口韧性,钢铁产品标准通常需要测试从无焊缝的一个平面纵向取样的夏比V型缺口(CVN)。这可能导致这种横截面的缺口韧性结果偏于不安全。因此,必须慎重考虑在低温或动力荷载的设计标准下转角和焊缝区域的缺口韧性。在此研究中,对总共378个夏比V型缺口进行试验,并完成6个北美冷弯矩形钢管平面、转角和焊缝区域的夏比V型缺口的韧性-温度曲线,从而研究冷弯成型、热处理、横截面几何学和焊接对矩形钢管横截面附近的夏比V型缺口韧性的影响。特别需要提到的是,这是首次直接对比使用不同方法(直接成型或连续成型)冷弯成型的矩形钢管的夏比V型的韧性。
Traditionally, the toughness of cold-formed rectangular steel tubes (RHS) under low temperature or dynamic loading has been one of North American concerns. In order to evaluate the notched toughness of rectangular steel tubes, the steel product standard usually requires testing of Charpy V-notch (CVN) samples taken longitudinally from one plane without the weld. This may lead to a less than unsafe result of the notch toughness of such cross-sections. Therefore, the notch toughness of corners and weld areas must be carefully considered under design criteria for low temperatures or dynamic loads. In this study, a total of 378 Charpy V-notches were tested and the ductility-temperature curves of the Charpy V-notch for the six North American cold-rolled rectangular steel tubes in the plane, corner, and weld regions were studied to study cold buckling Effect of Forming, Heat Treatment, Cross Section Geometry and Welding on Charpy V - Notch Toughness of Rectangular Steel Tube Cross Section. In particular, it is the first time to directly compare the Charpy V-Shape toughness of cold-formed rectangular steel tubes using different methods (direct or continuous forming).