Research On The Isolation Performance Of Aluminum Single Layer Dome Based On The Behavior Of Temcor Joint

As typical structure in the large span space structure-aluminum dome structure,because of the large span,small weight,corrosion resistance,and reasonable mechanical performance and the characteristics of elegant and more the favour of people.However,aluminum dome structure for modeling complex,the understanding of the structural system of seismic law did not go far enough.Spatial structure with the continuous improvement of technical level,the dome structure will continue to develop in the direction of larger span and complicated structure,in this case,the research on seismic response of demand is higher and higher,now,all kinds of seismic isolation and damping measures in the design of dome structure of large span is more and more common.At present,the scholars engaged in research on seismic performance of long-span dome structure is numerous,has also made a series of research achievements,this article is mainly aimed at previous scholars had not been studied after study on seismic isolation performance of aluminum single layer dome based on the behavior of temcor joint,hoping to be helpful for seismic isolation performance research of the large span space structure,The main conclusions are as follows:(1)Through consulting relevant literature,the development and application of large span space structure and the research status of isolation performance with aluminum dome structure has carried on the induction summary.(2)Analyzed the mechanism of structure seismic isolation;and temcor joint finite element model is established in ABAQUS software,based on the analysis,the vertical displacement of the node is obtained,and the curve of moment rotation relationship is established,the rotational stiffness value of node is obtained by numerical analysis,and come to conclusion that temcor joint belongs to the semi-rigid nodes according to standard.(3)On the basis of contrast analysis structure natural vibration characteristics of the rigid and semi-rigid temcor joint,bearing reaction,displacement and node displacement is studied under semi-rigid temcor joint dome structure with under the action rare earthquake wave.Research shows that dome structure with the rigid and semi-rigid nodes,both have the same vibration mode,the latter of vibration frequency is less than the former,isolation bearings' structure of vibration frequency is less than the ordinary bearing'structure;Viscoelastic bearing can effectively control structure of bearing reaction,displacement and node displacement,it have very good seismic isolation effect.(4)For single-layer aluminum dome structure of the viscoelastic bearing under the action rare earthquake wave,analysised the bearing reaction,displacement and the axial force of the bar in rigid and semi-rigid joints,different span,rise-span ratio and energy storage modulus cases.Research shows that Z bearing reaction of dome structure decreases with increasing of structural span;for change with bearing reaction of dome structure,rise-span ratio 1/4 is a turning point,when rise-span ratio is less than 1/4,bearing reaction decreases with increasing of rise-span ratio,however,if rise-span ratio greater than a quarter,bearing reaction increasing with the rise-span ratio increasing;bearing reaction of the dome structure decreases with the increase of the energy storage modulus;the axial force of the structural member under semi-rigid joints is slightly larger than the axial force of the structural member under the rigid joint,and the axial force difference between the two radial members is less than 7%,and the axial force difference between the inc lined members is less than 5%.