The mechanics of earthquake-induced foundation settlement for multi-storied building is briefly discussed and simplified method for calculating the earthquake-induced foundation settlement is presented in this paper. Based on this simplified method

the effects of foundation pressure

ground motion intensity

embedded depth

dimension and types of foundation on earthquake-induced foundation settlement are analyzed. It is concluded from these analyses that: ①with the increase of foundation pressure

or embedded depth of foundation or ground motion intensity

the earthquake-induced foundation settlements is increased. ②For some buildings and grounds

the seismic settlement may increase quickly when the peak value acceleration of ground motion come to a critical value. ③For raft foundations with the same width

the seismic settlement may reduce with the decrease length of foundation. But

for raft foundations whose length is the same

the seismic settlement may increases with the widening of foundation. ④Under the same condition

the earthquake-induced foundation settlement of multi-storied building on strip foundation is far greater than that of the same structure on raft foundation

and the earthquake-induced foundation settlement of multi-storied building is least with width of strip foundation of 1.2 m.