Abstract
Seismic design of bridges
Highlights
The minimum horizontal seismic base shear force H should be derived from the expression
***Ministry of Works and Development, Wellington where C.Hy = basic horizontal force coefficient, and depends on the chosen design value of structure displacement ductility factor y, the fundamental natural period of the structure, and on the seismic zone defined in figure 2.1
For y, account should be taken of the inherent ductility capacity of the materials adopted, the extent to which ductile response is assured by the adoption of special detailing provisions, and the relationship between structural and member ductility factor, including effects of foundation and bearing flexibility
Summary
The minimum horizontal seismic base shear force H should be derived from the expression. ***Ministry of Works and Development, Wellington where C.Hy = basic horizontal force coefficient, and depends on the chosen design value of structure displacement ductility factor y, the fundamental natural period of the structure, and on the seismic zone defined in figure 2.1. Z 0 = coefficient from Table 2.1, o depending on design return period. M = total mass assumed to participate in the horizontal degree of freedom. This should normally exclude the mass due to super-imposed live load.
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