Research On Seismic Performance Of Irregular Frame Shear Structure With Unilateral Partial Podium Building

With the prosperity and development of China's economic construction,high-rise buildings continue to emerge,in order to meet some special function requirements on building structure,often appear in some complex,flat surface irregular structure.The force of this kind of structure is more complicated,it is difficult to foresee the weak link and the destruction form in the structure design,Therefore,it is important to study the seismic performance of such structures under earthquake action.In this paper,the structure of medical complex building in Shandong province is taken as the object of study.The structure is a single side podium,which belongs to the irregular structure of irregular and facade.The main contents are as follows:(1)The structural model is established by finite element software PMCAD,SATWE software is used to analyze the mode decomposition response spectrum method and elastic time history analysis under the earthquake,analysis of the internal force and deformation of the structure under small earthquake.The structure of the medical complex building in Shandong Province is in the elastic state under the earthquake,and the seismic design satisfies the seismic fortification requirements of the elastic stage and conforms to the small earthquake elastic target of the seismic design.(2)The static and dynamic elastic-plastic analysis under rare earthquake of the structure is carried out through EPDA/PUSH software.Under the rare earthquake,the order and position of plastic hinge appear to meet the design expectation,the maximum inter story displacement angle can meet the requirements of the specification,able to achieve the desired seismic targets,part of the structure of the damage is serious,but the overall did not collapse.By comparing the two methods of elastic-plastic analysis,the location of the weak layer is judged by static elasto-plastic analysis,and the dynamic elastic-plastic analysis is used to calculate the displacement and internal force at every moment,can simulate the structure more accurately in the situation when the earthquake happened.(3)The pushover analysis is carried out by three different lateral loading methods,on the structure of this article,the results of the three loading forms are not very different,however,compared with the dynamic elastic-plastic analysis,there are still significant differences.(4)In addition to the structure of the X,Y to carry out elastic-plastic analysis,but also through the load direction and the X axis angle of 45 degrees to carry out additional checking,analysis of damage to the structure under rare earthquakes.