Hot spot stresses in rectangular hollow section connections with vent and drain holes under branch axial load

对于焊接管状桁架的热镀锌，必须指定允许填充、排气和排水的孔**。由于这些孔洞在载荷作用下不可避免地会改变节点处的应力分布，因此目前确定疲劳设计热点应力的方法不再适用。猎鹰电镀公司已经确定了在这一领域进行研究的必要性。这项研究将生成公式和图表，供工程师**轻松确定此类连接中的热点应力。为期六个月的项目结果将**帮助该公司提出改进的制造规范，以指导工程师和其他规范人员确保**镀锌钢管钢结构的预期使用寿命。

For hot-dip galvanizing of welded tubular trusses, holes to allow for filling, venting and drainage must be**specified. Since these holes will inevitably change the stress distribution at the joint location under loading, the**current method for determination of hot spot stresses for fatigue design does not apply. Falcon Galvanizing has**identified the need for research in this field. This research will generate formulae and charts for engineers to**determine the hot spot stresses in such connections with ease. The findings from the six-month project will**help the company propose improved fabrication specification to guide engineers and other specifiers to ensure**the intended service lives of galvanized tubular steel structures.