Research On Seismic Energy Dissipation Distribution Of Steel Frame Structure With Setback Shape

With the development and progress of China's building technology,there are more and more structures with unique functions and shapes.The body shape is a relatively common structural form.The reaction of this kind of structure in the process of earthquake is more complicated,because of the irregular structure form,which will lead to the excessive concentration of deformation of some floors of the structure.Compared with the structure of Body shape rule,this kind of structure is more prone to damage or even collapse in earthquake.Therefore,it is very necessary to analyze the seismic analysis of this kind of setback shape structure.The seismic design methods currently used can be mainly divided into the following two stages: the first stage is the elastic stage of the structure,the main design index is the bearing capacity of the component,and the verification index is the elastic displacement of the structure.The second stage is the plastic phase of the structure,in which the elastoplastic design of the structure is required.In the current seismic design method,as long as the ultimate deformation capacity of the structure can exceed the seismic response during earthquake action,the structure at this time is considered It is to meet the seismic requirements.It is worth noting that in the elastoplastic range of the structure,only a single index of displacement can not better reflect the performance of the structure under earthquake.The energy-based seismic design method considers both forces and displacements,as well as hysteresis energy and damage of the structure,and to some extent compensates for the insufficiency of the existing seismic design methods that can not consider structural energy consumption and damage.At present,the research based on energy seismic design method is mainly aimed at the structure of some body shape rules,but there are few researches on the structure of such body type,and there are many ways to collect the body shape structure.The top level income is among them.The energy-based seismic design method mainly includes seismic input energy and structural hysteresis energy distribution.This paper mainly studies the seismic energy dissipation distribution of top-level structures,including the following aspects:(1)The existing energy-based seismic design methods are summarized and the research status of energy-based seismic design methods is analyzed systematically.(2)Four steel frame foundation models and 32 steel frame top-level acquisitionmodels were built using PKPM and ABAQUS software.(3)The dynamic time history analysis of the established steel frame model is carried out to determine the distribution law of hysteresis energy consumption of the top-level retracting structure,and the corresponding calculation formula is fitted,which mainly includes the following three aspects: the total energy distribution of the beam-column in the structure.Law and its determination method;the distribution law of beam and column energy along the floor and its determination method;the distribution law of energy consumption of beam and column in the same floor.(4)The research results of this paper are verified by examples.