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［ 21］ LIU YUNHE，DANG KANGNING，DONG JING . Finite element analysis of the aseismicity of a large aqueduct
［J］. Soil Dynamics and Earthquake Engineering，2017，94：102-108 .
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Research on seismic isolation and reduction of
large aqueduct and its dynamic calculation based on“Design Standards”

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ZHANG Duoxin ，LI Jiahao ，WANG Qingyun ，WANG Zhiqiang ，CUI Yueyue 1
（1. School of Civil Engineering and Communication，
North China University of Water Resources and Electric Power，Zhengzhou 450011，China；
2. General Institute of Water Resources and Hydropower Planning and Design，Ministry of Water Resources，Beijing 100120，China）
Abstract：Taking the“Design Standards”as a guideline，the realization of several key technologies for dy⁃
namic analysis of large aqueducts is analyzed，and an 8-span large-scale aqueduct to be built in high in⁃
tensity seismic area is taken as the research object，applying the high damping rubber bearing to the isola⁃
tion and damping system of aqueduct structure simultaneously， considering the dynamic interaction between
water body and aqueduct structure system，the dynamic finite element model of structural system which con⁃
stitute of aqueduct body，water body，support and foundation are established. The equivalent bilinear resil⁃
ience model with adjustable damping is used to simulate the high damping bearing，and the inverse Fouri⁃
er transform was used to fit the artificial seismic wave conform with the site characteristics and to verify
its rationality， improving the Wilson-θ method and using it to solve the dynamics of the aqueduct system.
The dynamic responses of large aqueduct， such as displacement， deformation， bearing hysteretic perfor⁃
mance and transverse alternate displacement between aqueducts， are given， the isolation and damping ef⁃
fect of high damping bearing is analyzed， and the vibration isolation mechanism of high damping bearings
is analyzed in combination with the dynamic characteristics and response spectrum characteristics of large
aqueduct structure system. At the same time， considering the importance of grade 1 large aqueduct， it is
recommended to apply the principle of partial coefficient to superpose the maximum dynamic response of
the whole aqueduct structure in the entire time-domain and the full-field domain when calculating the ulti⁃
mate bearing capacity of the structure and checking the serviceability limit state. It can be expected that
the research results of this paper can promote the implementation and safe operation of the aqueduct proj⁃
ects which are going to be built and the already finished ones.
Keywords： Design Standards； large-scale aqueduct； dynamic calculation； seismic isolation and reduction；
transverse relative alternate displacement

（责任编辑：耿庆斋）

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