建筑金属结构用铸造法按一次性模式生产连接器组件的先决条件

V. Doroshenko, A. Yanchenko
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引用次数: 0

摘要

本文回顾了预制模块化建筑金属结构的常见元素,列出了它们的优点,并对消失模铸造(LFC)工艺中重要部件的制造前景进行了评估。这种使用金属结构的建筑必须具备所有先决条件,才能成为建筑行业的推动力和有效解决方案,这将有助于国家的重建。考虑了地震不稳定条件下连接梁的连接件和螺栓支架以及柔性钢板连接件的制造。自2011年以来,乌克兰国家科学院PTIMA研究所已经为许多框架单元薄壁铸造结构申请了专利,这些结构基于膨胀聚苯乙烯制成的图案,主要由重复元素组装而成,类似于安装预制建筑金属结构的现代方法。我们还获得了用铸造螺纹铸造LFC零件的经验,这简化了管状元件的球接头和锥形尖端的批量生产。在建造带有壳拱顶的机库和仓库时,减少金属壳的重量并强制保持其所需的强度是这类结构设计的重要要求。为此,在建筑结构中特别采用了由重力作用下由平面状态形成的柔性悬网的反演方法。本文利用倒链线作为拱门和圆顶的理想轮廓的事实,因为这种线形式的均匀拱门只经历压缩变形,而不是弯曲。提出了一种用热下垂热塑性合成膜反演法对复杂曲面的无力矩拱顶壳支撑面进行物理建模的方法,该方法比悬网反演法简单。
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PREREQUISITES FOR THE PRODUCTION OF CONNECTOR ASSEMBLIES OF BUILDING METAL STRUCTURES BY FOUNDRY METHOD ACCORDING TO ONE-TIME PATTERNS
The article reviews the common elements of prefabricated modular building metal structures with a list of their advantages and assessment of the prospects for the manufacture of their important components of the Lost Foam Casting (LFC) process. Such construction with the use of metal structures must have all the prerequisites to become an impetus and an effective solution in the construction industry, which will contribute to the reconstruction of the country. The fabrication of connector assemblies and bolt brackets for connecting beams and connectors with flexible steel plates for seismically unstable conditions is considered. A number of frame-cell thin-walled cast structures have been patented by the PTIMA Institute of the National Academy of Sciences of Ukraine since 2011 on the basis of patterns made of expanded polystyrene, which are assembled mainly from repeating elements, and which is similar to the modern method of mounting prefabricated building metal structures. We have also gained experience in casting with LFC parts with cast threads, which simplifies the serial production of ball joints and conical tips for tubular elements. When constructing hangars and warehouses with shell vaults, reducing the weight of metal shells with the obligatory preservation of their required strength is an important requirement for the design of such structures. For this purpose, in particular, the method of inversion of flexible hanging nets formed from a flat state by gravity is used for building structures. The article uses the fact that the inverted chain line serves as an ideal outline for arches and domes, as homogeneous arches in the form of such a line undergo only compression deformation, but not bending. The method of physical modeling of the support surface of the momentless vault shell of a complex curved surface by the method of inversion of the sagging heated thermoplastic synthetic film was developed, which turned out to be simpler than the method of inversion of hanging nets.
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