Темир йўл транспорти: долзарб масалалар ва инновациялар 3-jild (2024) · 84-90-betlar
INFLUENCE OF THE VERTICAL EARTHQUAKE COMPONENT ON THE SHEAR VIBRATION OF THE BRIDGE ON THE SLIDING FOUNDATION: INFLUENCE OF THE VERTICAL EARTHQUAKE COMPONENT ON THE SHEAR VIBRATION OF THE BRIDGE ON THE SLIDING FOUNDATION
Мирзаев, И., Аскарова, Д.С.
Annotatsiya
Vibrations of the railway bridge on the sliding foundation with dry friction under the action of real earthquakes records at the intensity of 7, 8, 9 and over 9 on the MSK-64 scale are investigated in the article. Dynamic dry friction problems are non linear, since the start and end times of each slip are determined during the problem solving process, they depend on many design parameters and external influences. The simplified model of vertical and shear deformation of the bridge is proposed in the form of oscillating intermediate support with the mass of the span connected to the girth rail by a rubber bearing part. In this case, all elements in the structural model are connected to each other taking into account eccentricities. The finite element method is used to discretise the coordinate variables and the Newmark time method with matrices built at each step. Structural vibrations are studied based on four real earthquakes records. It is shown that the use of a sliding foundation can significantly reduce the shear forces in the bridge supports depending on the structure mass, the dry friction coefficient and the nature of the seismic effect.
железнодорожный мост, сейсмозащита, реальные записи землетрясения, пролетное строение, опора, опорные части.railway bridge, seismic protection, real earthquake records, span, support, supporting parts.
Metadata manbasi: jurnal OAI-PMH arxivi · Sindex toʻliq matnni saqlamaydi, manbaga havola beradi.