Application In The Design Of The Large Span Prestressed Concrete Continuous Rigid-frame Bridge With Robust Method

Along with our country transportation enterprise rapid development, was in crossing over ability, serviceability etc., to the bridge set a higher request. The prestressed concrete continuous rigid-frame bridge because its structure stress performance good, the modelling succinct artistic, maintains the resilience slightly, earthquake resistance ability, to the terrain, the geology and is open to navigation request compatible, also quite is economical, receives the various countries bridge worker's favor and is displaying the huge potential. But in the use process discovered the main existence the questions are the cross center down-warping and concrete of the fixing of pier and girder dehiscence.The variation in bearing capacity, safe reliability and physical dimension, material performance of the structure of the bridge, etc., construct and change with the load in use, design and is involved in uncertain factors such as the error while calculating, etc.. The change of different uncertain quantity actual fluctuation, may cause structural performance index change by a relatively large margin, enable the structural function degradation, even lose efficiency. Under the uncertain environment, if the performance index of the structure can not merely reach the designing requirement, and change the insensitivity to the fluctuations of various uncertain quantities, this kind of structure is sane, reliable; it is what designer and user expect too. Tradition optimize method may make structural material use etc. and up to and save most no doubt, but it change very sensitive fluctuating, optimize with tradition method structure designed to go on sensitive, under the influence of uncertain factor, the structure is not reliable. So, it is very necessary to seek a design method, design by robust method, can solve this problem effectively.In order to meet the development of the communication of our country, prevent and solve the problem of the large span prestressed concrete continuous rigid-frame bridge that appear probably in the course of constructing and using process continuously, construct to the large span prestressed concrete continuous rigid-frame bridge go on, design research bridge expected winner that circle study both at home and abroad already that control, it is a very urgent important subject too. Carry on the large span prestressed concrete continuous rigid-frame bridge with robust method research that design of bridge control one new but have a subject for research of development very...