Research Into Deflection Of The Mid Span For High Pier And Long-Span Continuous Rigid Frame Bridge

With the development of transport,so this need to build more long-span bridge for acrossing the rivers and the Hoi Wan.so the PC continuous rigid frame bridge have being produced,have rapid development in recent years. PC rigid frame bridge could meet the request of long-span bridge's demands of power. with the exception of non-beam there are no other joints.it is comfortable and conducive to traffic. and have a good structure. strong anti-seismic capability,strong load-bearing capacity,structural characteristics of quick construction,therefore in urban and rural areas has been builded and building, have occupy an increasingly large proportion.In this paper, we choose Wei Jia Zhou long-span bridge as a project background and use a dedicated civil engineering design and optimization of structural analysis software MIDAS/Civil establish a large number of finite element model of the structure to calculation and analysis.by comparing the analysis result and calculated, effect of shrinkage and creep of concrete and vertical steel beem prestress loss is the downwarping result of long-span continuous rigid frame bridge beam's span centre.generated by these two in the span centre's downwarping accounting a majority parts.other changes for exemple,changes closure order can improve the main beam's downwarping some extent.