Abstract
Dynamic impacts that became frequent lately cause large human and economic losses, and their prevention methods are not always effective and reasonable. The given research aims at studying the way of enhancing explosion safety of building structures by means of yielding supports. The paper presents results of numerical studies of strength and deformation property of yielding supports in the shape of annular tubes under static and short-term dynamic loading. The degree of influence of yielding supports was assessed taking into account three peculiar stages of deformation: elastic; elasto-plastic; and elasto-plastic with hardening. The methodology for numerical studies performance was described using finite element analysis with program software Ansys Mechanical v17.2. It was established that rigidity of yielding supports influences significantly their stress-strain state. The research determined that with the increase in deformable elements rigidity dependence between load and deformation of the support in elastic and plastic stages have linear character. Significant reduction of the dynamic response and increase in deformation time of yielding supports were observed due to increasing the plastic component. Therefore, it allows assuming on possibility of their application as supporting units in RC beams.
Highlights
Explosive impacts refer to single emergency loads; they are characterized by high intensity and short term of action, which results in structural failure and in production facilities damage and human losses
The existing approaches to designing building structures resistant to explosive impacts are based on higher material consumption, which leads to increasing the cost of objects
This paper focuses on the numerical study of the strength and deformation property of yielding supports given as the tubes of annular section under static and short-term dynamic loading
Summary
Explosive impacts refer to single emergency loads; they are characterized by high intensity and short term of action, which results in structural failure and in production facilities damage and human losses. The research problem consists in impossibility of conducting experimental study that will provide comprehensive answers to the questions on the stress-strain state of yielding supports. Such situation is caused by the complex geometry of the structure under study and the peculiar features of its straining. The present work differs from the above-mentioned ones Those studies were conducted within the field of machinery and mechanics, while the given research is performed within the studies on increasing the explosion safety of building structures. It focuses on variation of the rigidity of yielding supports and reduction of the system dynamic response
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