| 摘要 |
FIELD: construction, road construction. ^ SUBSTANCE: invention pertains to road construction, more specifically to construction of bridges with improved seismic stability. The technical outcome is the increased effectiveness of dynamic damping of oscillations of the support of the bridge. The anti-seismic bridge consists of shore pier, at least one intermediate support and, at least two superstructures, supporting of which is achieved through pliable and moveable supports, distinguished by that, on at least one of the supports of the two intermediate superstructures, there are supports through pliable supports. The other ends of these superstructures have support on other supports through moveable supports, and rigidity of the indicated pliable supports is determined from the formula c1 = alpha1 k2 M1 c2 = alpha2 k2 M2 (1) where: c1 is rigidity of the pliable support of the first superstructure, c2 is the rigidity of the pliable support of the second superstructure, k is the natural frequency of oscillation of the intermediate support, on which the pliable supports are mounted, M1 and M2 are the masses of the first and second superstructures, alpha1 and alpha2 are coefficients which depend on the relative mass of the superstructures. ^ EFFECT: increased effectiveness of dynamic damping of oscillations of the support of the bridge. ^ 6 cl, 7 dwg |
