Research on Key Structural Issues of Pressurized Steel Structure Buildings at High Altitude
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摘要: 增压式钢结构建筑的增压荷载具有标准值高、持时长、幅值波动等特殊性,其变异性及组合效应是影响结构可靠度的关键因素。通过开展长周期荷载实测,以保障结构可靠度指标为前提,对比了多种主、从荷载组合方式,提出了以极限增压荷载(有界作用)指导的增压式建筑结构设计的方法,以及基于余压控制的增压式钢结构建筑气密性指标及评估方法,开展了建筑单模块(含连接部品)静态气密测试及其等效泄压面积指标评估。结果表明,增压式建筑整体气密性较飞机座舱更优。Abstract: The pressurization load of pressurized steel structure buildings exhibits particular characteristics, such as high standard values, long duration, and amplitude fluctuations. Its variability and combined effects are key factors affecting structural reliability. Under the premise of ensuring structural reliability, various combinations of primary and secondary loads were compared through long-period load measurements. A design method for pressurized building structures guided by the ultimate pressurization load (bounded action) was proposed. Based on the residual pressure control method, an evaluation index and method for the air-tightness of pressurized steel structure buildings were proposed. Through a series of static air-tightness tests on individual building modules (including connecting components), an indicator termed the equivalent pressure relief area was obtained. The results indicate that the overall air-tightness of pressurized buildings is superior to that of aircraft.
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