Abramczyk Jacek, Chrzanowska Katarzyna, Bielak Wiesław
Department of Architectural Design and Engineering Graphics, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland.
Department of Structural Mechanics, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland.
Materials (Basel). 2023 Sep 19;16(18):6284. doi: 10.3390/ma16186284.
The article describes a specific method of using innovative transverse systems of flat bar frames as structures forcing elastic shape transformations of nominally flat folded sheets into the forms of ruled shell roof coverings. An innovative method for parametric shaping these forms and arrangement of frames constituting structural systems of sheds with folded thin-walled roof coverings, taking account of the specificity of designing elastically transformed roof sheeting, was proposed. The proposed method for defining the loads of the considered frames supporting lower shelves of the folds of transformed roof sheeting, as loads distributed uniformly along the length of the upper chord of a roof frame girder, is also an innovative approach. The above unconventional premises result in the innovative topic of the research presented in terms of checking the impact of changing the shape of subsequent flat frames (intended for the construction of sheds roofed with the transformed sheeting) on the geometric and mechanical properties of the members of these frames. For the defined loads and the proposed parameterization of the frame forms, an innovative set of conditions was developed to optimize their performance, and then a theoretical analysis of the observed dependencies was carried out. This analysis was performed in an unconventional, novel way using section modules of the cross-sections of all members. The performed computer simulations confirmed the significance of changes in the inclination of girders and columns on the geometric and mechanical properties of the members. The obtained results are the basis and justification for simulations and tests in the scope of further modification of the form, loads, work, and methods of using various configurations of flat frames in constructions.
本文介绍了一种使用创新的扁钢框架横向系统的特定方法，该系统作为一种结构，可迫使名义上平整的折叠板材发生弹性形状转变，形成直纹壳屋顶覆盖形式。提出了一种创新方法，用于对这些形式进行参数化塑形以及对构成带有折叠薄壁屋顶覆盖物的棚屋结构系统的框架进行布置，同时考虑到弹性转变屋顶板材设计的特殊性。所提出的确定支撑转变后屋顶板材褶皱下层的所考虑框架荷载的方法，即将荷载沿屋顶框架梁上弦长度均匀分布，也是一种创新方法。上述非常规前提导致了所呈现研究的创新主题，即检查后续扁框架（用于建造覆盖有转变后板材的棚屋屋顶）形状变化对这些框架构件的几何和力学性能的影响。对于确定的荷载和所提出的框架形式参数化，开发了一组创新条件以优化其性能，然后对观察到的相关性进行了理论分析。该分析以一种非常规的新方式进行，使用了所有构件横截面的截面模量。所进行的计算机模拟证实了梁和柱倾斜度变化对构件几何和力学性能的重要性。所得结果是在进一步修改形式、荷载、工作以及在建筑中使用各种扁框架配置的方法等范围内进行模拟和测试的基础及依据。
