Theoretical Analysis On Main Steel Structure Of Qingdao 2014 World Horticultural Exposition Theme Pavilion And Study On Important Joints

Qingdao World Horticultural Exposition Museum has a large interior space,a large number of pick hanging outside,inside the atrium,the overall structure of the vertical component of the continuity is poor,the structure design is difficult.In order to ensure the safety of the structure,a new type of structure,such as buckling restrained brace,column joints and cast steel joints,is adopted.This paper will take the World Horticultural Exposition Museum main structure as the research object,with typical node displacement,acceleration,axial force and shear force as the index,the Theme Pavilion of structural seismic dynamic time history analysis of the seismic performance of buckling restrained brace,through analysis of the load,the stress distribution of the main structure of World Horticultural Exposition.Especially on the part of the force sensitive node by node mechanics test,finite element analysis and other means to summarize its stress characteristics.The main content are as follows:(1)Based on the analysis of World Horticultural Exposition Theme Pavilion structure stress characteristic,analysis of the advantages of the BRB frame,and the traditional steel frame structure,steel frame supporting structure with a qualitative comparison,determine the use of steel frame with buckling restrained braces as the construction process,solve the problem of structure design of building;(2)Using SAP2000 software,analysis of earthquake and the structure of the most unfavorable condition of the static response data of common brace and buckling restrained brace two structures are compared,the buckling restrained braced frame structure with structural stiffness and strength data support;(3)Analysis of seismic performance under rare earthquake and the general support of the BRB by using the time history analysis,the typical node displacement,acceleration,axial force and shear force for comparative index and common support,fully embodies the BRB structure under rare earthquake advantage.(4)Through the ABAQUS finite element analysis of the tree column joints,the stress distribution of the tubular joints in the tree column joint is compared with the column column in the case of stiffened plate,and the bearing capacity of the tree column joint is studied.