Finite Element Analysis On Steel-Concrete Mixed Connections Of Air-Cooled Condenser Supported Truss

The connection is one of important element on structure design,the connections which are reliable and valid have a very significant impact on the overall performance of the structure.The form of connections,which is reasonable can improve the reliability and the overall performance of the structure and reasonable in economy. Steel-concrete mixed connections as one of the key parts of air-cooled condenser supported truss structure have complex mechanics behaviors and thus is a key problem which engineers concern all the time.How to achieve "strong nodes,weak components," strong connection,the weak plate pieces'.It ensures that connections have sufficient deformation of ability,dissipation energy and ductility.It is essential for air-cooled supported steel truss-concrete mixing node.The factors were taken into account non-linear of the material,geometry,using finite element software ANSYS on the joints is established a finite element model,in which the typical joints of this paper.The ideal elastic-plastic stress-strain relationships and the Von-Mises failure criterion and the yield condition have been used for steel. The 3D models of steel-concrete mixed connections by 3D solid elements and beam elements are found.And the performances of joints under the monotonic loading and cyclic loading are analyzed.And identify the region of the control of the Stress and the way of the strengthening of the joints,calculated ultimate bearing capacity of the joints. At the same time,steel-concrete mixed connections of air-cooled condenser supported truss elastic-plastic performance are analyzed more accurate using the ANSYS finite element.The structure are tracked in the process of the entire load of stress and strain changes,the mechanical properties of the node and the expansion of the phenomenon plastic zone,the distribution of stress on joints are studied.And then,various factors of the influences of joints behavior under the monotonic loading can be analyzed such as changing the gusset plate thickness,steel strength.the ultimate bearing capacity and load displacement curves were compared using the results of the ANSYS and the test. The accuracy of the calculation methods and calculation results are verifiedBased on the analysis results,this thesis presents some beneficial suggestions and it can be provided the reference and help to the engineering design.