The architecture diagram shows that the height of the building is 18.55 m, and each floor stiffness distribution is uniform, no stiffness mutation, appropriate USES the bottom shear method for earthquake force calculation, based on the building location query, the region seismic fortification intensity of 7 degrees, site category for Ⅱ classes, design earthquake group is the second group, characteristic period of 0.4 s, due to the structure of reinforced concrete frame structure, therefore, take its damping ratio is 0.05.For the seismic influence coefficient, when the natural vibration period is greater than 0.1 and less than Tg,When the natural vibration period is greater than Tg and less than 5Tg,,;The shear force at the bottom of the structure is 0.08×0.85×53360=3628.48kNIs the action coefficient added to the top, which is controlled by the natural vibration period and the site characteristic period;0 = 0Additional top concentrating force: