A threedimensional multifield coupling model of tunnel blastingsurrounding rockbuilding structure under dynamic and static conditions is established based on data measured; and characteristics of vibration velocity amplifying effect of building structures induced by tunnel blasting is discussed and analyzed. The analytical results show that: 1) The response characteristics and vibration velocity amplifying effect of building structures under dynamic condition are different from those under static condition. 2) The vibration velocity amplifying effect of building structures under static condition is more obvious than that under dynamic condition; and the vibration velocity amplifying effect of building structures under dynamic condition is complicated and coincides with data measured. 3) The vibration velocity amplifying effect of building structures induced by tunnel blasting in soft ground is more obvious than that in hard ground.