Abstract:  Curing concrete’s mechanical properties under the strong earthquake action and the influence of early strength agent on the seismic resistance of curing concrete were researched through simulating test. The results show that: ① the stressstrain relationship is linear at initial stage, then becomes nonlinear with the increasing load; ② the compressive strength of seismic vibrated concrete sample is significantly lower than that of common sample, so seismic vibration has a significant effect to concrete sample when curing time is less than certain time; ③ the early strength agent content has a clear effect on concrete in gelled state, the higher the content of early strength agent is, the faster the concrete hardens.

Key words: earthquake, curing concrete, mechanical properties, simulating test