Design And Application Of Articulated Damping Support Hanger

With the introduction of the "Code for Seismic Design of Building Mechanical and Electrical Engineering" in 2015,China has attracted great attention to the seismic design of building mechanical and electrical systems,and seismic support hangers as an important part of seismic design,scholars have been more active in their research and attention,and seismic support hangers have also been used in more and more projects.Combined with the experimental research and practical engineering application results,it is found that most of the parts of the seismic support hanger are damaged at the connection between the lower end of the C-channel steel and the seismic connection or the hinge at the top of the C-channel steel and the building structure,and the cause of failure is mostly due to the slippage of the bolt at the connection or the C-channel steel at the connection is completely torn due to stress concentration.In this paper,an articulated damping support hanger is proposed for the optimization of seismic support hanger components,and a series of numerical analysis of the seismic support hanger is carried out by ANSYS finite element simulation software as a control group,and the main research contents and conclusions are as follows:(1)An articulated damping support hanger equipped with a limit U-shaped mild steel damper is proposed,and the composition,structure and principle of the hinged damping support hanger are introduced,and then the static analysis is carried out by establishing the finite element model of the pipeline analysis unit,and the analysis results show that compared with the seismic support hanger,the hinged damping support hanger has less rigidity,more uniform force,and the overall structure is softer;When the structure yields,the seismic support hanger diagonal brace is prone to failure,and the most dangerous part of the structure where the hinged damping support hanger is located is the upper part of the vertical boom of its load-bearing support hanger.(2)Using the time history analysis method,the finite element ground motion simulation is carried out on the pipeline analysis unit,and the influence of hinged damping support hanger and seismic support hanger on the performance indicators of the pipeline under different seismic intensity is analyzed,and the analysis results show that the bearing capacity of the two in the pipeline system is equivalent,and compared with the load-bearing support hanger,both have a large reduction in the displacement response amplitude and stress maximum value of the pipeline,and the vibration damping effect is obvious;Under the rare earthquake of seven degrees,the vibration damping effect of the displacement response of the seismic support hanger on the pipeline is better than that of the hinged damping support hanger,but with the increase of the seismic intensity,the vibration damping effect of the hinged damping support hanger on the pipeline is gradually better than that of the seismic support hanger,and the speed and acceleration response law is similar to the displacement.The hysteresis curve of the damper in the articulated damping support hanger is full,and it can be seen that the damper enters yield before the structure and dissipates the seismic energy input to the structure.(3)The relationship between the size of the damper and its hysteresis performance,one of the key parameters of the hinged damping support hanger,was analyzed through an example,and the design ideas and design methods of the articulated damping support hanger of the pipeline system suitable for different pipe diameters were expounded,and the method was applied to multiple examples,and the results showed that the method had certain reference value.Figure [48]Table [23]Reference [54]...