Initial stresses in two-layer metal domes due to imperfections of their production and assemblage

• Main Authors: Lebed Evgeniy Vasil’evich, Grigoryan Artem Akopovich
• Format: Article
• Language: English
• Published: Moscow State University of Civil Engineering (MGSU) 2015-04-01
• Series: Vestnik MGSU
• Subjects: metal domes; imperfections of assemblage; structural joints; fitting operations; displacements of joints; initial stresses
• Online Access: http://vestnikmgsu.ru/index.php/archive/article/download/1924

The process of construction of two-layer metal domes is analyzed to illustrate the causes of initial stresses in the bars of their frames. It has been noticed that it is impossible to build such structures with ideal geometric parameters because of imperfections caused by objective reasons. These imperfections cause difficulties in the process of connection of the elements in the joints. The paper demonstrates the necessity of fitting operations during assemblage that involve force fitting and yield initial stresses due to imperfections. The authors propose a special method of computer modeling of enforced elimination of possible imperfections caused by assemblage process and further confirm the method by an analysis of a concrete metal dome.