Reinforced concrete structures with complex inner geometry under the effect of high temperatures considering void former materials were examined. The analysis of strain-stress state of new type of architectural and construction system 'Monofant' under the effect of high temperature heating in standard fire mode, considering the change of design pattern was carried out. Numerical study of concrete slab with given reinforcement and complex inner geometry was carried out with use of software packages based on finite element method. Temperature fields throughout the depth of cross section of the slab of new type of architectural and construction system 'Monofant' upon heating in standard fire mode for time interval 0-240 min. were obtained. The carrying capacity of sections exposed to high temperatures was determined by deformation method. Offered the algorithm that considers the transformation of design patterns depending on temperature values and excessive pressure in thermal insulation cavities taking into account influence of deformation fields on temperature distribution.

Abstract. The analysis of strain-stress state of new type of architectural and construction system 'Monofant' was examined. The analysis of the advanced graphic, computing software packages was carried out. The possibility of joint applying these packages to the problem of sustainable conjunction study of a rational combination of the geometric parameters of the design-built system "Monofant" was analyzed. From the constructive point of view, the search for the structural element shape that provides a minimum material consumption under desired conditions is of some interest. The approach based on the energy criterion of rationalization was adopted to solve this problem. Fundamentally, new opportunities in the field of building structures optimization are offered with introduction of visual programming complexes adopted for designers (Grasshopper, Dynamo). Applying the described approach to the problem of rationalizing of the constructive system "Monofant" offers the opportunity of constructing, calculating, analyzing and rationalizing of construction that has complex external and internal geometry. An illustration of a possible approach is given in a specific numerical example.

Анотація. У статті запропоновано алгоритм визначення відповідальних елементів при прогресуючому обваленні будівлі від впливу пожежі. Алгоритм заснований на застосуванні максимально гнучких розрахункових схем та ітераційної процедури енергетичних портретів будівлі за критерієм Василькова-Шмуклера. Реалізація алгоритму продемонстрована на прикладі визначення відповідальних елементів реального житлового комплексу в м. Львові. За результатами складання 15 сценаріїв надзвичайного впливу пожежі на одну з будівель виявлено найбільш небезпечний сценарій аварії для всього комплексу в цілому.

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