Расчет аэродромных плит на температурно–климатическую нагрузку

Abstract

RU: При помощи ПК ЛИРА рассчитано количество арматуры в верхней и нижней частях аэродромных плит при различных температурных воздействиях. Полученные результаты сравнены с результатами расчета вручную. Проанализированы причины расхождений результатов программного расчета и расчета вручную. Предложено разработчикам программного комплекса ЛИРА внести корректировки в задание температурных нагрузок по толщине конструкции.

EN: Problem statement. Temperature — climatic effects may have a significant impact on the stress — strain state of reinforced concrete structures. This effect depends on the temperature gradient through the thickness of the structure. Previously been calculated temperature distribution over the thickness of the slab for the airfield two extremes and three intermediate values of air temperature [1]. Considering the changes in daily temperatures, we can talk about having a place of non-stationary temperature conditions and in the corresponding temperature field through the thickness of the concrete structure. This research raises the question patterns of change of the stress — strain state airfield plates and reinforcement depending on temperature changes in thickness airfield plates. Analysis of publications. In [1], which is a previous stage of the research carried out fully set out the methodology of calculation of temperature fields in thickness airfield plates depending on the maximum positive, negative, and intermediate temperature air. Objectives. Calculation airfield plates on the temperature–climatic effects. Conclusions. To get more reliable results of the calculation, the following activities: – To establish the thickness of the plates with a long thermocouple measuring daily, monthly, seasonal and annual temperature; – To take into account the actual coefficients of thermal conductivity of each layer of concrete, depending on its temperature; – To calculate the temperature fields in thickness airfield plates in conditions of unsteady heat flux; – Consider the airfield plate as a sandwich construction, taking into account the thermal and deformation characteristics of each layer.