Research On Partition Coefficient Of Horizontal Impact Force And Component Importance Coefficient Of Straight-wide Pile Framework Wharf

This article accordance with actual situation of Orchard Wharf of Chongqing Portphase Ⅱexpansion project,ANSYS large finite element software is adopted to studyPartition Coefficient of Horizontal Impact Force,main influence factors and theirsensitivity of inland waterway Straight-Wide Pile Framework Wharf bentstructure.Meanwhile,component importance coefficient method is adopted to studypower transmission way and the importance of components stress of structurecomponents of Straight-Wide Pile Framework Wharf under the horizontal impact force.Specifically,the paper’s main research work and the research results include thefollowing aspects.（1）Finite Element Method is adopted to respectively analyze the five factors,including wharf bent frame numbers,bent frames space,pile foundation diameter,pilecap width,and bank slope,and their influence to Partition Coefficient of HorizontalImpact Force of wharf bent frame. Calculations show that appropriately reducing bentframes space,increasing bent frame numbers and broadening pile cap width will makePartition Coefficient of Horizontal Impact Force of wharf bent frame more uniform;increasing pile foundation diameter will contribute to increasing bearing capacity of pilefoundation but will make Partition Coefficient of Horizontal Impact Force relativelyconcentrated;avoiding ship impact force to act directly on the ends of bent frame, butmooring towards the middle bent frames will make partition coefficient more uniformlydistributed in all bent frames.（2）Take single factor sensitivity analysis method to conduct quantitative analysisabout the sensitivity degree of Partition Coefficient of Horizontal Impact Force underthe five influencing factors.The results show that when the impact position is in1-2hawser layer,the sequence of sensitivity degree is bent frames space> pile diameter>bent frame numbers> pile cap width> bank slope; in3-7,the sequence of sensitivitydegree is bent frames space> bent frame numbers> pile cap width> pile diameter>bank slope;bent frames space is the most sensitive to the influence of partitioncoefficient.（3）Importance evaluation method based on structural generalized stiffness isadopted to respectively calculate component importance coefficient of Straight-WidePile Framework Wharf under no load and horizontal loading.Under horizontal loading, the rule of component importance coefficient is pile> the second column> the highestcolumn.Load combination condition,the most important node for shelving behind thebottom,this is overhead vertical wharf bent frame structure’s weakest link,shouldincrease the node in the structural design of security reserves,to strengthen thecomponent in the design and construction process of supervision and inspection.（4）Component importance coefficient average and mean square error, and structurestress rationality relation.The more stressed,the more rational,the less componentimportance average,the more alternate paths of structure.Therefore structuraloptimization method of Straight-Wide Pile Framework Wharf based on componentimportance coefficient is put forward.Examples show that the method is feasible,andcan be used for the optimization of similar complex structures.