The Seismic Performance Analysis Of Multi Span Belt Corridor Bridge Structure

Coal conveying strap lounge Bridges in coal mines, coal preparation plant and powerplant has a wide range of applications. With the development of coal industry in our countryand the improvement of construction standard, frame structure of coal conveying belt throughshort construction standard is higher and higher. But coal conveying strap short framestructure in all previous of earthquake damage is more, caused serious economic losses to theenterprise. So for coal conveying strap short do some in-depth study of the seismicperformance of frame structure, seismic design Suggestions have important theoreticalsignificance and engineering application value.This paper, using the finite element software SAP2000, the engineering of the commonthree kinds of structure forms of coal conveying belt on lounge Bridges, to simulate the frameaccording to simulation results, the seismic performance of three structure system is analyzed,mainly done the following research work:(1)For three different structure forms of bridge structure modal analysis, the results showthat the first three order vibration mode of the influence of the structure, but higher ordermodes of bridge frame of faulting and deformation is large, calculation can’t be ignoredhigh-order mode. For three different structure forms of bridge structure modal analysis, theresults show that the first three order vibration mode of the influence of the structure, buthigher order modes of bridge frame of faulting and deformation is large, calculation can’t beignored high-order mode.(2)The three bridge structure in vertical, horizontal, vertical and horizontal double fouroperating conditions on the seismic response spectrum analysis, analysis shows that thebridge structure pillars displacement Angle between1/2319~1/1045, meet the1/550of thethreshold. Bridge set up three drop-down derrick under a triangle type CHS and skew bridgewithout drop-down derrick stiffness big, after adding the boom, in part, of the lower chordwith derrick bridge internal force of the symbols on the contrary, part of the internal force is offset, reduced the bridge deflection.(3)The three bridge structure under seismic action of the elastic time history analysis,and compared with the response spectrum analysis results. Analysis shows that this kind oflarge span structure should pay attention to the end door frame stiffness, to ensure the safetyof to temporary structure in horizontal earthquake.(4)On the bridge dynamic elastic-plastic time history analysis, it is concluded thatstructure in the deformation and stress distribution of octave under severe earthquake action,the nonlinear analysis results show that the lower bracket of concrete frame beams andcolumns are of different level into the plastic state, in which the lower end of the framecolumn for the weak position.Combining with engineering practice and experience both at home and abroad, andbased on the actual structure of the simulation analysis of some seismic advice, for thedesigners to provide reference for the seismic design and analysis of such structure.