Study On Seismic Behavior Of Staggered Truss Structures

On the basis of the continuous development of steel structure structure,about 60 years by the Massachusetts Institute of Technology scholars to develop a class of energy saving,space utilization is high,and can be applied to high-rise building structure in the system,which is staggered Truss structure system.The research of staggered truss structure in Europe and the United States began earlier,and domestic scholars have been relatively late to analyze and inquire the staggered trusses,and the project is applied to engineering practice.In recent years,the study of this structure is deepening,because the staggered truss system in the lateral lateral stiffness is relatively large,relatively speaking,his longitudinal truss stiffness is much smaller,vertical and horizontal stiffness gap will produce a torsion effect,This will have an adverse effect on the seismic resistance of the structure.Therefore,this paper analyzes the interlayer displacement angle of the three schemes by using time-history analysis method by arranging the damper,buckling support and the combination of the two in the staggered truss longitudinal members.Top-level node displacement and top-level acceleration,etc.,at the same time evaluate the effect of three programs to reduce energy consumption.The contents of this paper are as follows:First,The finite element analysis software MIDAS GEN system is used to analyze the eigenvalue and response spectrum of the staggered truss system.After the eigenvalue analysis,we can know the vertical and horizontal translation period of the structure,and draw some conclusions.By means of response spectrum analysis,we can obtain the data of interlayer displacement and interlayer displacement angle in the longitudinal and transverse directions.The longitudinal and lateral data are compared with the lateral data,and the longitudinal lateral stiffness is much smaller than that in the transverse direction.The torsional effect is easy,Unfavorable,it is necessary to consider the reinforcement of the longitudinal truss.Second,The seismic performance analysis of a variety of damping energy dissipation schemes is carried out.The time-history analysis method is used to analyze the seismic behavior of the longitudinal structural buckling support,the damper and the combined damping scheme.Interlayer displacement angle,layer shear force and overturning moment and other data,lay the foundation for the following analysis.Third,The comparison and evaluation of the three kinds of damping schemes are carried out.The time-course analysis method is used to compare the interlayer displacement angle of the three nodes,the time-course comparison of the top-level nodes,and the time-course comparison of the top-level nodes.Displacement angle,the top node displacement,the top of the node acceleration has a good effect of the size of the joint shock absorption program to reduce the effect of the best energy-saving,damping shocks followed by energy-saving components again.