Numerical Analysis And Experimental Study Of Mechanical Characteristics On Skew Hollow Slab Bridge

Owing to possessing structure simplicity、 construction convenience、 economy、low structural depth、 lifting weight lightness and others,The prefabricated simple supportcored slab bridge got know clearly comprehensive application in our country highwayconstruction.while crossover river or there have been road and others impediment and bridgewire row aren’t perpendicularity，cored slab bridges are usually construct in heterotropicform.related research data had showed that skew cored slab bridge existed significantdifference on stress property when compared with perpendicularity cored slab;the stressproperty of the skew cored slab bridges gotten very complex as the existed skew angle.theskew angle has made a great deal of influence on this kind of bridge，but skew angle how toinfluent this kind of bridges to degree?how about the influence rule changing？it is lack ofuniform cognition for the present.this kind of bridge structure appearant longitudinal crack inthe same direction as bridge direction、veneer stress and others pathology along with timeof service prolong.therefore，this kind of bridge ’ design philosophy and design methodexist required soundness and advanced place.practical test to carry out skew cored slabbridge’s stress property investigation and mostly approach skew angle degree ’ influence onstatic performance and dynamic characteristics of this bridges.this text carry out the task whichis relyed on changchun roll city high speed sixteen meter spaned cored slab beam bridge as follows:1.Based on the theory of E.C.Hambly’ shearing force flexibility girder cascade, utilizemidas civil built skew cored slab beam bridge ’ finite element model and proceeding fieldperformance test on it to demonstration model accuracy.2.Aiming at theeffect of skew angle degree on simple support cored slab beam bridge’static performance, this text extract cored slab beam bridge midspan’ bending moment、displacement、 stress under different skew angle degree, contrast the effect of skew angledegree on simple support cored slab girder’ static performance and count simple supportcored slab beam bridge’ load lateral distribution coefficient at different skew angle degree which is based on the finite element method.3.Utilizing subspace iteration method to analyze dynamic characteristics of cored slabbeam bridge under different skew angle degree and arrive at the effect rule of skew angledegree on strcture’ dynamic behaviour..