Seismic Design And Parameter Analysis Of Frame Structure With Few Shear Walls

The frame structure with few shear walls can solve the problem of lack of sufficient redundancy and allowable inter-story drift index and so on which frame structure contains;It is applied in the existing structure.In order to learn more about the difference between the frame structure with few shear walls and the frame structure in the new built precautionary building,The article has mainly indicate the following work:Take a school building as a calculate example,select the site of classificatory III,the building layer of two to five.Based on the design parameters as seismic precautionary intensity,seismic grouping,building layer to elasticity analysis under the frequent seismic action through ten of frame structure models,to find out four dissatisfied specification limits parameter models allowable inter-story drift index,such as with the seismic precautionary intensity of 7（0.1g）,seismic grouping of three,building layer of 4^th or 5^th;and with the seismic precautionary intensity of 7（0.15g）,seismic grouping of one,building layer of 4^th or 3^rd.Select representative frame structure model—7（0.1g）,grouping of three,site of classificatory III,layer of five from the above range,to form the frame structure with few shear walls model through added few shear walls,to choose elasticity analysis under the frequent seismic action and static analysis（pushover）under rare seismic action to assess the four frame structure with few shear walls designs.The conclusion is as follows:The shape of the four frame structure with few shear walls designs is the same as the frame structure,Shear form.The reasonable design is as follow:It is advisable to add a"T"-shaped flange wall on the second span to form a wall-less frame structure,preferably on the staircase column.Try to choose thin and short wall which avoid special-shaped columns and require the provision as far as possible.Comparative elastic-plastic dynamic analysis under frequent seismic action and super rare seismic action（higher than the are seismic action,the maximum acceleration time is 400cm/s²）of frame structure and frame structure with few shear walls yields that:In the direction of the main force,the maximum allowable inter-story drift index of frame structure with few shear walls is smaller than that of the frame structure under the action of rare seismic;The frame structure with few shear walls seems more fully in the energy chart,energy consumption stronger,which the equivalent structural damping ratio of is 33.3%¹66.7%higher than frame structure;The performance of the plastic hinge of frame structure with few shear walls has even more reached the level of IO（immediate occupancy）;The number of moderate damage to the key components（frame columns）in the frame structure with few shear walls is less than that of the frame structure.The maximum allowable inter-story drift index of frame structure cannot meet the requirements of elastic-plastic deformation under super rare seismic action but frame structure with few shear walls can.On the one hand,the frame structure with few shear walls performs much better than the frame structure in damage member,on the other hand,the number of plastic hinge performance level of the frame structure with few shear walls less than frame structure.