Construction Control And Reinforcement Design In The Complex Region For Long-span Continuous Rigid Frame Bridge

Continuous rigid frame bridge is a kind of bridges with solidified the piers and thebeams that develops on the basis of the continuous beam bridge and the rigid T-framebridge.The bridges maintain both merits of continuous beam with no expansion jointand driving smooth,and merits of T-frame bridge without needing suppose support andtransform the system.In addition,the bridges also have very big flexural rigidity andcrosswise torsional rigidity.Furthermore,the flexural of the high pier is used to adaptthe structure displacement caused by the pre-stressed,the concrete shrinkage,the creepand the temperature change.As the continuous rigid frame bridges can satisfy theespecial long span bridge stress request,this kind of bridges occupies theadvantageously competitive position in the modern long-span bridges.In order toguarantee the structure reliability,the bridge line shape and the stress in theconstruction process to meet the design requirement,it is necessary to do furtherresearch on the construction technology for the continuous rigid frame bridge.In thisthesis,the grey predictive control approach has been applied on the constructioncontrol of CaoLong Bridge that is a PC continuous rigid frame bridge.Results has beensuccessfully proved that the application of grey predictive control system can ensureconstruction safety,make ideal alignment of superstructure and the internal force ofCaoLong Bridge after closing-join.As for in long-span continuous rigid frame bridge,it is insufficient that the partial complex region analyzed only in FEM plane frame thatthis part of region does not conform to Bemoulli hypothesis.Consequently,it isnecessary to conduct analyses on the space finite element as analyses in FEM planeframe can't reflect the structure real stress condition.According to the Bemoulli hypothesis,each part of structure can be divided intoBemoulli region(B-region)and Discontinuity region(D-region).The former can talliesthe hypothesis while the latter can not.The stress are complex in the areas solidifiedwith bridge pier and beam and its nearby regions belonging to the D-regions the stresscondition analyzed in FEM plane frame by all appearances can reflect the truth.Moreover,the section size of the pier and beam in those regions is very big,whichcauses the complex stress region scope to be very big.However the present correlationstandard does not definitely stipulate stress analysis of the complex region andreinforcement design,Designers usually depend on the experience to carry onprocessing.As a result,the construction quality is usually difficult to guarantee.According to the structure principal stress trajectory,the strut-and tie models use the...