Seismic Response Analysis Of Long-span Space Grid Under Multi-support Excitation And Vibration Control

With the rapid development of science and technology,large-span space grid structure has become increasingly widespread application,so how to improve the long-span space grid structure of the seismic reliability and economic applicability has been very concerned about one of the issues in the academia and the engineering.The current study focused on two aspects:The first is how to build a more realistic method of seismic response analysis;another is how to effectively control the shock absorber to reduce the seismic response of structures.This article uses the method of the computer simulation,which has conducted system's research about seismic response analysis of long-span space grid under multi-support excitation and vibration control of the shape memory alloy(SMA)-rubber composite bearing.The work mainly includes the following several aspects:(1) The basic theory of long-span space grid under multi-support excitation was analyzed.The theory includes some questions which are the analysis method of the multi-support earthquake inputs,the dynamic equation establishment and the solution approach,as well as how to exert the actual earthquake acceleration and realize it in ANSYS software procedure and so on.(2) The paper analyzed the earthquake response analysis of long-span space grid under multi-support excitation.Firstly,the model of space grid structural calculation is established.At the base of the mode,the appropriate seismic wave was selected in accordance with regulatory requirements to conduct an appropriate adjustment. Subsequently,the seismic response of single point and multi-support seismic input which is based on the the model is analysed,finally,the computing outcome was compared and analyzed in the light of two different seismic waves. (3) The mechanism and theoretical analyses of the large-span roof space grid structure was studied.Firstly,studying mainly the vibration control of structure from the consumes energy anti vibration support aspect.Secondly,further analyzing from the SMA material and the rubber support structure to the anti vibration isolation ability of SMA- rubber compound support.Lastly,carrying on the partial characteristic parameter determination.(4) The insulation performance study of long-span space grid under multi-support excitation was analyzed.Firstly,the long-span space grid under the consistent earthquake function shock insulation effect was analyzed,and then takes into account the seismic characteristics of the role of space conditions,the study of such structural damping performance of vibration isolation.The result indicated that the SMA- rubber compound bearing can also have the good shock insulation effect under multi-support excitation.