The Analysis On Optimal Design And Seismic Response Of The Beam String Structure

The Beam String Structure(BSS) is becoming one of the state-of-the-art researches because of its successful applications in many important long-span buildings. In this thesis, optimal design of the Beam String Structure under static load and time history analysis under seismic load were carried out by the general Finite Element software ANSYS(FEA), basing on the model of canopy's modification works about Tianjin Station.Firstly, according to the Beam String Structure's constraint conditions and the changes of the strut's number, the finite models of different structure were built to analyze structure and compare the results. And then the more reasonable structural scheme was determined.Secondly, aiming at the problem about the lots of using steel, this paper optimized the whole structure's using steel by adjusting space among purlines, component's section and the type of attachment between purline and BSS.Thirdly, this thesis computed and analyzed the dynamic properties of the BSS, the analysis on dynamic property of BSS shows that the vibration along-span mode is primary and the analysis of frequency had been given out. At the same time, this paper mainly considered the influence of the BSS's constraint conditions and pre-stress on the structural seismic response by using direct integration methods. The results of the paper apply significant reference to the design of BSS.