Test and seismic analysis of continuous girder bridges with large piers with height difference based on high surface pressure separation isolation device
Test and seismic analysis of continuous girder bridges with large piers with height difference based on high surface pressure separation isolation device
In order to solve the seismic problem of continuous girder bridges with large piers with height difference in high intensity area in southwest China,this paper proposes to use high surface pressure polyurethane supports and separate isolation supports to adjust the stiffness gap between piers in seismic design.A series of tests were carried out for the separated isolation bearings,and the mechanical properties of the dissipative bearing components of working separately and as a whole were studied.The mechanical properties of the new isolation device were studied in combination with the tests of high surface pressure polyurethane bearing conducted by previous scholars.The results show that the two new isolation devices have good isolation performance and stiffness adjustment ability.On the basis of the test results,Software Midas/Civil is used to model a typical bridge along a highway in the southwest mountainous area of China.The finite element analysis shows that the isolation device has good damping effect on the continuous beam bridge with large pier height difference.
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