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受四川汶川8.0级特大地震的影响,西安西郊某150m高的钢筋混凝土烟囱从78m处折断倒塌。通过对烟囱倒塌现场的勘测及烟囱残存部分和基础的检测,结合检测结果及施工情况的分析,得出了烟囱倒塌的原因并提出了相关建议,以避免此类事故的再次发生。同时,对烟囱的抗震性能进行了模态分析和反应谱分析,结合其地震反应特点,验证了烟囱倒塌发生的原因。
Affected by the magnitude 8.0 Wenchuan earthquake in Sichuan, a 150-meter-high reinforced concrete chimney in the western suburbs of Xi’an was fractured from 78m. Through the investigation of the scene of the chimney collapse and the detection of the remaining part and foundation of the chimney, the analysis of the test results and the construction situation, the causes of the chimney collapse are concluded and relevant suggestions are put forward to avoid the recurrence of such accidents. At the same time, the modal analysis and response spectrum analysis of the seismic performance of the chimney are carried out. Combined with the characteristics of the seismic response, the cause of the chimney collapse is verified.