Analysis Based On ANSYS Simulating The Construction Of Ultra-high Formwork Supporting System Of Transfer Floor

With the general development of urban construction,More and more high-risebuildings have used transfer floor to meet different needs of architectural function.The transfer beam has a large section,which needs large volume of reinforced bar.Meanwhile, the construction load is very large.So the formwork supporting system isvery complex.In the construction process,instability phenomenon of the supportingsystem occurs from time to time,engendering template accidents happendedfrequently,which should arouse the attention of construction and technical personnel.The formwork supporting system of transfer beam belongs to long ultra-highmode branch system,which needs a special design.At present,our country has not yetissued ultra-high template design specification.The design of ultra-high template hasreferenced scaffolding specification.So the study of global stability on this kind ofsupport formwork has an important practical engineering significance.The thesis will give a project case to illustrate the current design method ofultra-high template and point out the deficiencies of the method.The fastener node offormwork is semi-rigid. At present,the calculation model recommended is the modelof a continuous compressive bar with a number of flexible supports,which complyswith engineering practice.The thesis will set up a3d holistic finite element model bythe finite element analysis software ANSYS to analyze the globle stability of thetemplate support system.To simulate the semi-rigid fastener node,the thesis useselement COMBIN14,the torsional rigidity of which is46.85kN·m/rad.The value isbased on the study of predecessors,they did project tests and pointed out the modelcomplyed with engineering practice when the torsional moment is40N·m.Comparethe finite element analysis result and theoretical result,and then based on that simulatethe stability situation of ultra-high template in the process of casting concrete.In order to better guide engineering practice,the thesis analyzes the affects ofvarious factors to the stability of ultra-high template,such as bottom horizontal tube,diagonal bracing,bearing constraints,the diameter and wall thickness of tube,additional upright tube,ect.The analysis shows that ultra-high mode branch system hassome difference with the general scaffolding project.