Limit load is the maximum load that a structure can safely carry. It's the load at which the structure is in a state of incipient plastic collapse. As the load on the structure increases, the displacements increases linearly in the elastic range until the load attains the yield value. Beyond this, the load-displacement response becomes non-linear and the plastic or irreversible part of the displacement increases steadily with the applied load. Plasticity spreads throughout the solid and at the limit load, the plastic zone becomes very large and the displacements become unbounded and the component is said to have collapsed.
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| - Carico limite (it)
- Limit load (physics) (en)
- Draagkracht (constructie) (nl)
- Несущая способность (механика) (ru)
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| - Несущая способность — в теории пластичности, максимальная нагрузка, за пределами которой происходит неограниченная пластическая деформация («течение») конструкции. Несущая способность обычно рассчитывается в предположении использования материала (при этом игнорируется история нагрузок). Поскольку в практических случаях упругие деформации зачастую пренебрежимо малы по сравнению с пластическими, используется также модель . (ru)
- Limit load is the maximum load that a structure can safely carry. It's the load at which the structure is in a state of incipient plastic collapse. As the load on the structure increases, the displacements increases linearly in the elastic range until the load attains the yield value. Beyond this, the load-displacement response becomes non-linear and the plastic or irreversible part of the displacement increases steadily with the applied load. Plasticity spreads throughout the solid and at the limit load, the plastic zone becomes very large and the displacements become unbounded and the component is said to have collapsed. (en)
- Un carico nell'ingegneria strutturale è un sistema di forze applicate che possono originare una deformazione e conseguente stato di sollecitazione in una struttura. Un carico limite comporta il raggiungimento di una situazione particolarmente critica per l'opera intera o parte di essa.Una consapevole ed attenta analisi strutturale ha proprio la funzione di evitare il verificarsi di questi inconvenienti.Secondo il metodo degli stati limite, il carico limite si distingue fondamentalmente in due tipologie:
* carico di stato limite ultimo
* carico di stato limite di esercizio (it)
- Met de draagkracht wordt bedoeld hoeveel gewicht of andere krachten een constructie kan dragen. Zo wordt gesproken van de draagkracht van een vloer, een brug, etc. Ook de ondergrond of fundering van een gebouw kan een maximale draagkracht hebben (zie draagkracht (ondergrond)). De draagkracht is de maximale belasting die een constructie veilig kan dragen. Boven deze belasting kan de constructie plastisch vervormen of zelfs instorten. (nl)
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| - Limit load is the maximum load that a structure can safely carry. It's the load at which the structure is in a state of incipient plastic collapse. As the load on the structure increases, the displacements increases linearly in the elastic range until the load attains the yield value. Beyond this, the load-displacement response becomes non-linear and the plastic or irreversible part of the displacement increases steadily with the applied load. Plasticity spreads throughout the solid and at the limit load, the plastic zone becomes very large and the displacements become unbounded and the component is said to have collapsed. Any load above the limit load will lead to the formation of plastic hinge in the structure. Engineers use limit states to define and check a structure's performance. Bounding Theorems of Plastic-Limit Load Analysis:Plastic limit theorems provide a way to calculate limit loads without having to solve the boundary value problem in continuum mechanics. Finite element analysis provides an alternative way to estimate limit loads. They are:
* The Upper Bound Plastic Collapse Theorem
* The Lower Bound Plastic Collapse Theorem
* The Lower Bound Shakedown Theorem
* The Upper Bound Shakedown Theorem The Upper Bound Plastic Collapse Theorem states that an upper bound to the collapse loads can be obtained by postulating a and computing the ratio of its to the work done by the applied loads. (en)
- Un carico nell'ingegneria strutturale è un sistema di forze applicate che possono originare una deformazione e conseguente stato di sollecitazione in una struttura. Un carico limite comporta il raggiungimento di una situazione particolarmente critica per l'opera intera o parte di essa.Una consapevole ed attenta analisi strutturale ha proprio la funzione di evitare il verificarsi di questi inconvenienti.Secondo il metodo degli stati limite, il carico limite si distingue fondamentalmente in due tipologie:
* carico di stato limite ultimo
* carico di stato limite di esercizio In entrambi i casi si studia il carico concentrato oppure distribuito che, secondo le previsioni progettuali, porterebbe la struttura ad una condizione indesiderata, che va dalla semplice deformazione eccessiva (con pregiudizio all'accessibilità e vivibilità, o anche solo con problemi estetici) al danno pericoloso per la resistenza e stabilità della struttura e per l'incolumità delle persone che vi sono all'interno.Le entità calcolate hanno un valore spesso ipotetico, soggetto a margini ampi di errore, soprattutto se la struttura presenta particolari complessità. La cautela nei confronti di tali eventualità è affidata a vari coefficienti di sicurezza, che trasformano il carico limite in carico di progetto. Questo termine fa riferimento al metodo degli stati limite,attualmente in vigore e contenuto nell'eurocodice. Si misura, a seconda dei casi, in Newton o in Pascal, e relativi multipli e sottomultipli. (it)
- Met de draagkracht wordt bedoeld hoeveel gewicht of andere krachten een constructie kan dragen. Zo wordt gesproken van de draagkracht van een vloer, een brug, etc. Ook de ondergrond of fundering van een gebouw kan een maximale draagkracht hebben (zie draagkracht (ondergrond)). De draagkracht is de maximale belasting die een constructie veilig kan dragen. Boven deze belasting kan de constructie plastisch vervormen of zelfs instorten. Als de belasting van een constructie toeneemt, nemen in het elastische gebied de vervormingen lineair toe. Als de belasting wordt teruggebracht veert de constructie terug naar de oorspronkelijke vorm. Wordt een hogere belasting dan de maximale draagkracht toegepast, dan wordt de relatie tussen last en verplaatsing niet-lineair. Er is dan sprake van plastische vervorming. De vervorming is dan ook niet meer omkeerbaar. (nl)
- Несущая способность — в теории пластичности, максимальная нагрузка, за пределами которой происходит неограниченная пластическая деформация («течение») конструкции. Несущая способность обычно рассчитывается в предположении использования материала (при этом игнорируется история нагрузок). Поскольку в практических случаях упругие деформации зачастую пренебрежимо малы по сравнению с пластическими, используется также модель . (ru)
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