Methodology for Calculating the Technical State of a Reinforced-Concrete Fragment in a Building Influenced by High Temperature

Abstract

The purpose of research was to develop a methodology for testing the fire-resistant quality of a building fragment influenced by a real fire to substantiate the main calculation methodology provisions and determine the residual load-carrying ability. While testing, it was supposed to determine the technical state of reinforced-concrete structures after high-temperature exposure and further intensive extinguishment. High-temperature heating and further fire extinguishing with water leads to the surface layers’ destruction and weakening of concrete. Impact on the structures of the open air leads to destruction and delamination of weakened concrete with further exposing of reinforcement and its corrosion. The approach, implemented in LIRA-SAPR software package, makes possible to take into account the influence of changes in the temperature regime of operation on the stress-strain state of the structure. After determining the temperature fields, it is necessary to reduce the rigidity characteristics of materials and perform a calculation of strength. When using this approach in order to determine the total deformations of the structure, it is necessary to take into account the creep deformation.

Modeling of Non-Stationary Heating of Steel Plates with Fire-Protective Coatings in Ansys under the Conditions of Hydrocarbon Fire Temperature Mode

“…3. A further direction of work based on the writing of programs for calculating steel structures for fire resistance and for solving the larger-scale problems of numerical simulation of fire effects on fire-resistant steel structures has been identified [15,16].…”

Selection of Material and Thickness of the Protective Wall in the Conditions of a Hydrogen Explosion of Various Power

“…The blast pressure wave propagates in all directions from the epicenter of the accidental explosion, moving around solid obstacles such as protection wall, and gradually loses the intensity of its impact on the surrounding environment. The pressure forces form a total bending moment M, the action of which causes the occurrence of a bending resistance stress at the base of the protecting wall [16].…”

“…Of course, the most reliable results of solving this scientific and applied problem can be obtained experimentally [11,12]. Use of such highly specialized computer information systems as ANSYS [13,14] or LIRA [15,16] makes it possible to numerically estimate the stress state of the structural elements of the equipment [17,18]. If we consider the undisturbed state of atmospheric air, the main influence on the characteristics of protective devices is exerted only by the climatic parameters of the environment [19].…”

Investigation of the Influence of the Physical Properties of Landfill Soils on the Stability of Slopes in the Context of Solving Civil Security Problems

“…Scientists pay increased attention to the impact of high temperatures on the technical condition of facilities of utilization а biogas, which is obtained in the conditions of the landfill. In work [21], the authors calculate and determine the residual bearing capacity of structural elements of objects that pose a potential danger.…”