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the variation of displacement versus time. 

the variation of displacement versus time. 

Source publication
Conference Paper
Full-text available
The general assumption is that stiffness matrix is constant in structures. But if the loads increase, deformation-load curve becomes nonlinear. The aim of this study is to analyze the vibration of a structure under these facts. The chosen sample problem is a steel single storey frame with a horizontal force. At first, classical stiffness matrix is...