The Study On Performance Based Seismic Design Stratagems For A High-rise Building’s Shear Wall Structure In High Intensity Region

The reinforced concrete shear wall structure has a dual function of receiving vertical loads and horizontal loads(actions),and is commonly used in high-rise buildings in high-intensity areas.It is the most widely used structural system in high-rise structures of high-rise residential,dormitory,hotel,etc.In the seismic design of shear wall structures,how to control the seismic performance of the whole structure and its components under different levels of action such as multiple earthquakes(small earthquakes),fortified seismicity(middle earthquakes)and rare earthquakes(large earthquakes).The structure has the necessary stifffness and bearing capacity,but also has a good energy consumption mechanism and sufficient deformation ability.It has long been a subject of continuous research and pursuit of goals in the structural design community.At present,according to the two-stage design method given by China:the traditional earthquake-resistance design method based on the verification of bearing capacity of small earthquakes and the elastic-plastic checking of structural weak parts under large earthquakes and the structural earthquake resistance measures related to conceptual design,it is difficult to adapt to the seismic design of high-rise structures in high-intensity areas.The main problem that exists at present is that the bearing capacity performance of the structure under the action of the medium earthquake cannot be guaranteed.The performance-based seismic design method is a design method that can take into account structural commonality and individuality requirements.It can achieve relatively clear performance levels under different seismic levels and is therefore used as a seismic design method for high-rise structures in high-intensity areas.This paper aims to correct or adjust the current two-phase design method.This paper mainly discusses the performance-based seismic design countermeasures for high-rise shear wall structures in high-intensity areas.The main work includes:1)Three high-rise building shear wall structural models with high-intensity areas are designed.The structural model includes structural components such as short-limbed walls,connected-limb walls,coupling beams and frame beams.2)Using the YJK structural design software to design three shear wall structural models with different overall lateral stiffness.The model was imported into the ETABS software for calculation and the modal and base reaction results were compared.The dynamic elastic-plastic time history analysis of the structure was performed using Perform-3D software.The influences of the displacement angle and the base shear force of different structural layers were compared;the plastic yielding of the shear wall structure and the damage status of the main components were analyzed.3)Combining with the current Chinese standard seismic design theory,the evaluation results of the shear wall structure based on integral and component-based seismic performance are compared,and suggestions are made for seismic design methods of high-rise building shear wall structures in high-intensity areas.