ЭКСПЕРИМЕНТАЛЬНЫЕ И ТЕОРЕТИЧЕСККИЕ ИССЛЕДОВАНИЯ ЖЕЛЕЗОБЕТОННЫХ ПЛОСКИХ ПЕРЕКРЫТИЙ ПРИ УДАЛЕНИИ ЦЕНТРАЛЬНОЙ ОПОРЫ

В работе экспериментально и теоретически рассмотрены вопросы оценки живучести железобетонных конструктивных систем с плоскими дисками перекрытий в особой расчетной ситуации.

Представлена методика проведения экспериментальных исследований для двух масштабных моделей фрагмента плоского перекрытия в случае удаления центральной опоры при статическом (образец FS-1) и динамическом (образец FS-2) нагружениях. На основании полученных данны выполнен анализ основгых механизмов сопротивления плоских дисков перекрытия прогрессирующему обрушению.

В статье представлен теоретический подход прямой количественной оценки живучести, который основан на положениях энергетического баланса поврежденной конструктивной системы в особой расчетной ситуации. Предложенные рещения позволяют определить нелинейную квазистатическую реакцию «нагрузка-перемещение» и величину предельного динамического сопротивления для железобетонных конструктивных систем с плоскими дисками перекрытий в случае удаления вертикального ключевого элемента.

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