The use of hollow sections to form lightweight structures is widespread in common steel processing industries such as crane, commercial vehicle, steel bridge and agricultural machinery construction. The hollow sections are mainly designed as truss or frame structures, in some cases using high-strength and higher-strength steels in order to achieve optimum utilization of the component and material. A new collection of fatigue life data covering sequence effects and the accuracy of the linear damage accumulation is presented. Effects of the shape of the applied load spectra and sequence effects of different amplitudes have been investigated. This document covers tubes of 4 to 8 mm thickness made by low-carbon or mild steel S355J2H. In general, it was found that the spectrum shape and the loading sequence have an influence on the service life. Depending on the shape of the spectrum, random tests tended to lead to shorter service lives than tests with block-loading sequences. An influence of overloads was also found for the tests with interspersed overloads. Typical maximum linear damage sums taken from recommendations and codes of 0.2 or sometimes 0.5 are exceeded for all spectra investigated and in some of the cases even significantly above 1.0. Transferability of the recommendations to component-type structures like tubular joints needs revision to lift its lightweight potential. Using stress concentration factors (SCF) from finite element analysis, typical strength values for the structural and effective notch stress concepts are checked. All joints investigated show a significantly higher strength compared to the IIW recommendations using the structural stress approach or compared to the DVS 0905 with the effective notch stress approach.

使用空心型材形成轻质结构广泛应用于起重机、商用车辆、钢桥和农业机械建造等普通钢材加工行业。空心型材主要设计为桁架或框架结构，在某些情况下使用高强度和更高强度的钢材，以实现构件和材料的最佳利用。提出了新的疲劳寿命数据集，涵盖序列效应和线性损伤累积的准确性。研究了所施加的载荷谱形状的影响和不同幅度的序列效应。本文件涵盖由低碳钢或软钢 S355J2H 制成的厚度为 4 至 8 毫米的管。一般来说，我们发现谱形状和加载顺序对使用寿命有影响。根据频谱的形状，随机测试往往会导致比块加载序列测试更短的使用寿命。对于散布过载的测试也发现了过载的影响。对于所有研究的光谱，从建议和规范中得出的典型最大线性损伤总和为 0.2 或有时为 0.5，在某些情况下甚至明显高于 1.0。建议对管状接头等组件型结构的可移植性需要进行修改，以提升其轻量化潜力。使用有限元分析中的应力集中因子 (SCF)，检查结构和有效缺口应力概念的典型强度值。与使用结构应力方法的 IIW 建议或使用有效缺口应力方法的 DVS 0905 相比，所有研究的接头均显示出明显更高的强度。