本文报道了一系列钢管焊接连接试验的结果。在德克萨斯大学进行的四阶段计划中的第二次探索，旨在确定当连接构件承受轴向载荷时，在这样的关节中发生的局部应力的分布和大小。石油工业为这项研究提供了动力，它在许多结构物中使用管状构件，尤其是海上钻井塔和平台。 对10个代表实际使用的焊接接头的试样进行了测试。 其中七个样本涉及一个单独的支撑（小管）框架到弦（大管）的完整表面。其中四个支撑轴与弦轴成90°角，三个支撑角为45°。其余三个试样为多（3）个支架连接到弦杆表面的接头。这些试件的三个轴在每个弦杆的三个轴上相交。此外，四个轴位于单个平面上，支撑轴与单个弦轴成45°、90°和135°角。 弦杆的两端牢牢固定在加载夹具中，各种轴向载荷被施加到支架上。通过位于管道表面的电阻应变计监测接头关键点的应力。测得的应力提供了构造等压线和等压线轮廓、应力模式和应力分布所需的信息，这些信息包含在附录中，用于测试每个试样上的每个载荷。 这些结果随后被用于分离每个试样中显著应力的位置和大小。 由于T型接头的尺寸参数因试样而异，因此可以定量评估其对应力的单独影响。这是以设计列线图的形式完成的。这些图表应为在役此类接头的结构完整性负责人提供宝贵信息。 还对接头进行了失效测试，并对其在极限和接近极限时的行为进行了定性评论，以确保其完整性

This paper reports the results of a series of experiments performed on welded connections between steel tubes. The exploration, the second in a four-phase program being conducted at the University of Texas, was directed toward determining the distribution and magnitudes of local stresses occurring in such joints when the joined members are subjected to axial loadings. Impetus for the research was provided by the petroleum industry which utilizes tubular members in many structures especially offshore drilling towers and platforms. Ten specimens representative of welded joints used in practice were tested. Seven of the specimens involved a single brace (small tube) framing onto the unbroken surface of a chord (larger tube). In four of these, the axis of the brace made a 90° angle with the axis of the chord and three had brace angles of 45°. The remaining three specimens were joints with multiple (3) braces joining to the surface of the chord. The axes of the three braces in each of these specimens met at a single point on the axes of the chord. Further, the four axes lay in a single plane with the brace axes making angles of 45°, 90°, and 135° with the single chord axis. With the ends of the chord securely fastened into a loading jig, a variety of axial loads were applied to the braces. The stresses at critical points in the joint were monitored from electrical resistance strain gages located on the surfaces of the tubes. The measured stresses provided the information required to construct the contours of isostatics and isobars, the stress patterns, and the stress distributions that are included in the appendix for each of the loadings on each specimen tested. These results were then used to isolate the location and magnitudes of the significant stresses in each specimen. Because the dimensional parameters for the T-joints were systematically varied from specimen to specimen, their individual influence on the stresses could be quantitatively appraised. This was done in the form of design nomographs. These charts should provide invaluable information to those responsible for the structural integrity of such joints in service. The joints were also tested to failure and qualitative comments concerning their behavior at and near ultimate are included for completeness