Air-cooled technology is the development direction in the thermal power

and as the bearing structure

safety of support structure system play an important role in the normal operation of the power plant.Traditional support structure system usually uses hybrid layouts of steel truss and reinforced concrete pipe column

whose mass and stiffness are not even in the vertical direction.In order to solve the problem of larger and larger installed capacity

this paper chooses a new type support system

which is called fish-bellied support structure to study the response of earthquake

including the basic dynamic characteristics

the displacement and the column base shearing force of the corner column and side column and analyses the stress of the abdomen and gives the design suggestion when considering the torsional effect.And the results show that we should pay more attention to the torsional effect

and the earthquake response under bi-directional earthquake action should multiply the magnification factor when not considering the torsional effect.