The Mechanic Analysis And Study On Pu-he Bridge In Shenyang

The Pu-he bridge in shenyang is a self-anchored suspension bridge with spatial cable retcord. In this paper some calculation and research work of self-anchored suspension is doingby taking the Pu-he Bridge in shenyang as engineering background. The main contents are asfollows:(1) The paper calculate the mechanics characters of the bridge under finished bridge statethrough building a space finite element model. The internal force of girder, main cable andhanger was calculated under dead load and live load. Meanwhile the relationship betweentemperature and the internal force of girder, main cable and hanger was investigated. Thestress of control section and the internal force of main cable under combination load was alsocalculated.(2) The free vibration frequency and mode is calculated though building a dynamicalanalysis finite element model. The Interaction of soil-pile and the intern force of cable wasconsidered.The calculation results show that: the free vibration frequency of the bridge is high,the distribution of free vibration frequency is crowded, and the mode of dorsal cord is more.So it should be analyzed by CQC method other than SRSS method during seismic responseanalysis. Further more, the influence of the bridge by changing of the major structure designparameters on girder rigidity, tower rigidity and dead load was analyzed.(3) The seismic response of Pu-he bridge in shenyang is analyzed by response spectrummethod under earthquake level P1,P2. The internal force of girder and tower is calculatedsubjected to longitudinal excitation, lateral excitation, vertical excitation and composition ofdifferent seismic loads. From the structural response result of the composition of differentseismic loads, we can draw a conclusion that vertical vibration plays an important role in thecomposition, so which can not be ignored. According to compare the internal force of thebridge under composition of different seismic loads and static-state load. we can conclude theanti-seismic calculation doesn't control the design...