Abstract
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.
Highlights
The requirements to constructed structures increase continually in the course of development of modern construction technologies that provides for the use of pre-cast and cast-in-place concrete
Small number of articles dealing with reinforced concrete structures with complex inner geometry under the effect of high temperatures considering void former materials give rise to the need in either field or numerical studies
Temperature fields on cross section of floor slab upon one-sided heating in standard fire mode were obtained by means of Ansys software package [7] at volumetric FE model for heating time from 0 min. to 240 min
Summary
The requirements to constructed structures increase continually in the course of development of modern construction technologies that provides for the use of pre-cast and cast-in-place concrete. The main feature of this design is concealing liners of the certain shape made of light and widely used materials, such as polystyrene foam and mineral wool, in slab body. The efficiency of this structure is conditioned by section symmetry that determines the ability for random supporting. This results in variableness of bending moment field of cross-section
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