The Analysis Of Dynamic Stability Of Double-layer Reticular Prestressed Latticed Shell Which Under Earthquakes

The prestressed lattice shell structure is a kind of a novel space structure,At present, researches are only limited to the static behavior of the structure ,Aimed at this problem, dynamic stature is studied in this paper. By using numerical method , the dynamic response of double-layer reticular domes due to earthquakes is directly obtained in the paper. According to the characters and regularity of the response, the qualitative research of the dynamic stability of these structures is performed. All the calculations are completed by the FEM software Ansys.A practical method for researching dynamic stability of double-layer reticular prestressed latticed shell is put foeward. Dynamic stability of double-layer reticular prestressed latticed shell under earthquake action,sudden load and harmonic load is discussed withdiferent parameter. Based on the studying of dynamic stability of double-layer reticular prestressed latticed shell under horizontal and vertical sudden load ,the quantitative relationship of double-layer reticular prestressed latticed shell under horizontal and vertical sudden load and static load is discussed. Utilizing several earthquake waves to get the effect of different input waves. The analysis has shown that the response varied so great that it is too inaccuracy and irrespective to study the dynamic stability behavior by input only one wave.Based on these research results, the paper gives a general understanding of the dynamic behavior and the failure process.