TY - JOUR N2 - The paper presents the original concept of description and analysis of buildings (wall and floor structures), corresponding to the natural components of construction, quasi finite elements (QWSFS). This concept constitutes one of the component of the developed, interactive model of deep foundation buildings. The presented modelling method enables a significant reduction of the number of unknowns, which in the case of interaction building – subsoil, gives a possibility of including the factual geometry and building development stiffness into the FEM model. Therefore the true representation of static operation of the objects can be analysed. The paper gives basic assumptions to the construction of the QWSF-superelements as well as the results of numerical tests conducted. The potential of using the developed modelling concept in the analysis of the structural elements and deep foundation problems, in a three-dimensional system: subsoil – new building – potential neighbouring building development (at each stage of erection of investment, using a structural statics stage analysis) was presented. L1 - http://journals.pan.pl/Content/122013/PDF-MASTER/art34_corr.pdf L2 - http://journals.pan.pl/Content/122013 PY - 2021 IS - No 4 EP - 541 DO - 10.24425/ace.2021.138516 KW - deep foundation buildings KW - interaction building – subsoil KW - large-scale quasi finite elements KW - superelements KW - three-dimensional schemes A1 - Miedziałowski, Czesław A1 - Ustinovichius, Leonas PB - WARSAW UNIVERSITY OF TECHNOLOGY FACULTY OF CIVIL ENGINEERING and COMMITTEE FOR CIVIL ENGINEERING POLISH ACADEMY OF SCIENCES VL - vol. 67 DA - 2021.12.30 T1 - Modelling of the spatial structure of longwall buildings with large-scale quasi finite elements and applying the method in the interaction issues with subsoil – with regard to their implementation in stages SP - 527 UR - http://journals.pan.pl/dlibra/publication/edition/122013 T2 - Archives of Civil Engineering ER -