| China is an earthquake-prone countries, according to the forecast of China’sSeismological Bureau, China mainland has entered the fifth active period ofearthquakes, earthquake probability would be more intensive in recent years.Earthquake-prone, and its harm to human society will increase. Bridge as the hub oftransportation facilities, before the earthquake is facing enormous challenges, strongdestructive earthquake occurred in China in the past few years, all the time does notindicate the severity of the earthquake hazard, which bridges the damage suffered inthe earthquake is people in the industry learned a profound lesson.However, large cross-Long continuous beam bridge its own merits, in the actualbridge design and construction to become the most widely used one of the bridge,because of its sheer number of this bridge type is destroyed when an earthquake occurs,the possible will also increase its seismic analysis becomes necessary, but alsoextremely important, but also because of the particularity of this type of bridge,seismic analysis more difficult.The Hengyang eight joint cross Chen Jiazhou main bridge taken as the engineeringbackground, Introduction to different seismic analysis methods select two analysis ofthis widely used analytical methods in earthquake engineering background seismicresponse analysis, the main contents are as follows:(1) large general-purpose finite element software Ansys background in civilengineering, is being used for the astonishment and analysis of the analysis model, andwith the sliding bearing friction and the pile-soil-structure interaction premise underthe bridge under different parameters from the shock features taken into account;(2) The design response spectrum in accordance with the fortification of seismicintensity input specification, Chen Jiazhou bridge seismic response spectrum analysis;(3) Under the fortification seismic intensity input seismic waves, Chen JiazhouBridge uniform excitation of seismic time-history response analysis, the responsespectrum analysis of the comparison and analysis of the uniform excitation time;(4) With the vibration of this bridge based on the input mode of the parameterswith the considering of the traveling wave effect and the time-history responseanalysis, and consider the traveling wave effect under the premise of bridge seismicperformance with the changing of different bridge structural parameters. |
