Abstract The wind loads of two chimneys with different distances and incident angles were obtained by pressure measurement tests, and the results were presented as interfering factor (IF) contours. The interference effects on the across-wind loads were significantly greater than those on the along-wind loads. The dynamic responses of the chimney were calculated using the frequency domain method, and the extreme response interfering factors (RIFs) at different reduced wind velocities were obtained. For the extreme along-wind responses, the most unfavorable incident angle (MUIA) was 105°, and the maximal RIF was 1.3. For the extreme across-wind responses, the MUIA was 15° or 30°, and the maximal RIF was 1.9. Moreover, the combined envelope interfering factors (EIFsc), which were the combined maximal RIFs of all reduced wind velocities, were determined by combining the along- and across-wind responses. Because the equivalent static wind loads are determined based on the structure responses, EIFsc can be used as the IFs of the equivalent static wind loads as guide for wind-resistant designs of actual chimneys.

中文翻译：

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两个高烟囱之间的干涉对风荷载和动力响应的影响

摘要 通过压力测量试验获得了两个不同距离和入射角的烟囱的风荷载，并将结果表示为干扰因子（IF）等值线。对横风荷载的干扰影响明显大于对顺风荷载的干扰。采用频域法计算烟囱的动力响应，得到不同折减风速下的极端响应干扰因子（RIFs）。对于极端顺风响应，最不利入射角（MUIA）为105°，最大RIF为1.3。对于极端横风响应，MUIA 为 15°或 30°，最大 RIF 为 1.9。此外，组合包络干扰因子 (EIFsc)，即所有降低风速的组合最大 RIF，是通过结合顺风和横风响应来确定的。由于等效静风载荷是根据结构响应确定的，因此 EIFsc 可用作等效静风载荷的 IF，作为实际烟囱抗风设计的指南。