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现有规范标准对大跨度敞开式金属屋面板的设计和施工缺乏合理规定。根据实际火车站屋面板工程,采用沙袋堆载的静载试验方法,进行了760型金属屋面板整体抗风揭试验。分析了该类型屋面板在风吸力作用下承载力、挠度和关键部位的应变分布规律,并研究了采取自攻螺钉、夹具、垫片等加固措施对金属屋面板承载力和破坏形式的影响。试验结果表明,采取合理加固措施可以有效地提高760型金属屋面板的抗风揭承载力。研究成果将为火车站、航站楼等大跨度敞开式金属屋面板的设计与施工提供科学依据,还可以为类似大型场馆金属屋面板体系的加固提供有价值的参考。
The existing specification standard lacks reasonable provisions for the design and construction of long-span open metal roofing panels. According to the actual railway station roof panel project, using the static loading test method of sandbags, the overall wind-resistant exposing test of 760 metal roof panels was carried out. The load-carrying capacity, deflection and strain distribution of the key parts of the roof under wind suction are analyzed. The influences of self-tapping screws, fixtures, gaskets and other reinforcement measures on the bearing capacity and failure modes of the metal roof are studied. The test results show that adopting reasonable reinforcement measures can effectively improve the wind-lifting bearing capacity of 760 metal roof panels. The research results will provide scientific basis for the design and construction of long-span open metal roofs for railway stations, terminal buildings, etc. It can also provide a valuable reference for the reinforcement of similar large venue metal roof systems.