Study On Dynamic Performance Of Non-Structural Components For Large Span Building Structure

Non-structural components are all components except the building structure. Non-structural components in large span building structures mainly include Ma Road, wind pipe, lamps, speakers, hanging ceiling and other roofing material. Non-structural components have the indispensable function in use. But multiple earthquake damage reports show that the most serious destruction is seldom caused by the main structure, but the non-structural components. So it is necessary to study the dynamic performance of non-structural components. Current researches on non-structural components are mostly in frame structure. The methods are mainly the equivalent lateral force method and floor response spectrum method. The study on dynamic performance of non-structural components for large span building structure is relatively lagging behind.First of all, in terms of flat plate structure of single-point-connection non-structural component of single degree, displacement and connection force formula in the frequency domain were derived by the way of the mode decomposition response spectrum method combined with transfer function method. Next, the theoretical formula was expanded to grid structure of single-point-connection non-structural component of single degree in the frequency domain by the way of Pseudo Sandwich Plate. Then the validity of the theoretical formula was verified by numerical simulation. Parametric analysis got the change rule of the frequency-domain dynamic response for the coupled structure regarded to frequency ratio and mass ratio, it also obtained the degree of main structure displacement decrease. In the end, seismic time history analysis of grid coupling structure was carried out. Conclusions are as follows:1) When the frequency ratio is close to 1, frequency tuning effect enhances, accessory structure response increases.2) When the mass ratio increases, frequency tuning effect enhances, accessory structure response reduces.3) When the frequency ratio reaches about 1, the primary structure displacement decrease is generally up to 40%. When the frequency ratio deviates from 1, with the decrease of the mass ratio, the decreased degree of the primary structure displacement reduces greatly. When the frequency ratio is 0.7~0.8 or 1.1~1.2 and mass ratio is in the range of 0.01 ~ 0.02, the primary structure displacement decreases to 10%~20%.