Analysis Of Energy Dissipation For Arch-supported Double-layer Cylindrical Reticulated Shell Structure

The viscous dampers and Lead Rubber Bearings were fitted to the Space Composite Structure which composed of double layer cylindrical latticed shell and Steel arch. A series of analysis were done in order to get the law of isolation and shock absorption, providing reference for advanced theory and experiment Studies in future. The main contents and achievements are shown as following.Shock isolation technology theory and its application status in space structure was introduced in this essay , Meanwhile, the basic structure, influencing factors, computation model and damping principles of viscous damper and lead rubber bearings were described; Performance-based seismic design principle of energy dissipation structure was sketched. On the basis characteristics of large spatial reticulated structure ,the intensity and stiffness of the Space Composite Structure is big, belong to multiple statically indeterminate structure, in response to previous research experiences of Shen Shizhao, Zhang Yigang and so on, when the earthquake occurs, often only a few of the rod pieces are damaged, only the local bar in nonlinear state,Fast Nonlinear Analysis (FNA) method which belong to the time-history analysis method can be well used in the seismic control design of large-span space structures. Using AUTOCAD and MST of Zhejiang University to establish arch-supported double-layer cylindrical reticulated shell structure of the geometric model, and carries on the analysis and optimization of static bar ,The geoetrical model of the Space composite structure was established. By using the software SAP, the Dynamic Response under the impact of three-direction earthquake wave was obtained. A energy dissipation scheme for the structure with viscous damper and Lead Rubber Bearings was put forward basing on the vibration mode combination information. According to the various layout of dampers, schemes were introduced, among which optimal scheme was selected after comparison. Find a validated method of damper decorate plan. This paper first expounds a method about vibration mode combination and verified based on computational data, then demonstrates the feasibility of this method. Ultimately vibration damping and isolation scheme were determined. The influences of the viscous dampers parameters and lead rubber bearing on vibration reduction effects method has been used to investigate.According to the shock absorbers and isolation parameters on the damping effect of the changes, put forward suitable arch-supported double-layer cylindrical reticulated shell structure with viscous dampers and lead rubber bearing, the layout scheme will has a certain reference value for practical engineering application.