Study On Energy Dissipation Performance Of A Joint Damper With Preloading Assembly Structure

In recent years,prestressed fabricated structure in people lives plays an increasingly important role.But the traditional prestressed reinforced concrete frame structure of the large number of applications are limited,because the beam-column structure at the node connection is not stable enough,and the seismic form does not meet the specifications.Due to the beam-column connection will lead to the overall structure is difficult to support.People experience under the experience of many earthquakes,the use of energy dissipation techniques to avoid earthquakes to bring disaster.The concept of damping energy dissipation technology is to set the damping device at the beam-column connection,and to increase the overall rigidity of the structure by additional damping devices to dissipate more seismic energy,so as to reduce the earthquake hazard.In this project task,four nodal specimens are designed and fabricated,namely,insitu joint specimens,in-situ specimens,additional damping devices,and dampers.The quasi-static test method is used to study the four groups of frame specimens.After the test is finished,two kinds of edge nodes and middle nodes are modeled and analyzed by ABAQUS finite element software according to the relevant test conditions.The basic steps are as follows: the middle and the end nodes,the parameters of concrete,the assembly of components,the displacement and force analysis steps,the addition of prestressed steel bars,the addition of boundary conditions,the division of meshes,the submission of results,and so on,and the related energy dissipation performance of the preloading frame structure joint dampers is concluded.Through the analysis of test and finite element hysteresis curve and stiffness curve of energy performance indicators can show that: compared with the cast-in-situ node,the energy consumption of the structure nodes with additional damping devices is greatly improved,and the load-carrying capacity is enhanced to a certain extent,effectively improving the overall structure Rigidity,which provide the experimental basis and the theoretical basis for studying the energy dissipation performance of the preloading structure node dampers.