Near-fault ground motion recordings from the same earthquake event

i.e.Chi-Chi

Taiwan earthquake（Sep.

21

1999）

are selected as input

and the influence is analyzed systematically of the characteristics of near-fault ground motions

including rupture directivity

hanging wall and pulse-like motion

on the seismic responses of bilinear single degree of freedom（SDOF） system

base-isolated building and cable—stayed bridge.The computational results illustrate that the structural effect of pulse-like ground motions increases with the increase of initial natural period of bilinear SDOF system

and the pulse effect of structure in the long-period region is most significant.Moreover

the influence of rupture directivity and hanging wall effect of ground motions on the displacement demand of SDOF system is period-dependent.For the base-isolated building and cable-stayed bridge

the structural effect of directivity of near-fault ground motions is remarkable

and the structural effect of hanging wall is distinct.Generally

the characteristic of velocity pulse of ground motions amplifies the dynamic responses of long-period structures.