The Key Design And Technology Of Construction Of Simple-Continuous Beam Bridge

This thesis aim at The developments circumstance of the high grade highway in our country and effective demand etc.Problem of midding span of bridge developments . Of simply supported continuous beam bridge structure of the mechanical properties, the construction process, the second pre-stressed, study support settingUsing theory of structure intensity and prestressed concrete bridge,this paper reviews theoretical computing method of stress and deflection. Making use of the procedure of computing bridge structure, the structure of simply supported -continuous system is calculated and the result is analyzed.Discussbridge structure design and construction in aspect of concrete material, prestress design and technology of stretching reinforced bar.From the support forms,the simply supported—continuous bridges have mostly two main structural forms:single prop and dual prop.To better exert the traits of the simply supported-continuous bridge and understand the mechanics of this bridge in diferent support forms , a mechanical analysis is made through the support sedimentation, temperature change and deviation of dual prop.Through the analysis,the relevant conclusions are educed and a consult to the correlative personnel for servicing the project is given.Considering engineering practice,the partial pressure problem of flat anchors has its own speciality in the simple supported-continuous girder bridge.The finite element program was used to analyse the problem in terms of four different conditions from the aspects of lay.out depth of the toothed bar and the reinforcing fabric under the fiat anchor.The stress distribution under the flat anchors for diferent conditions was studied,and the cracking behavior,cracking mechanism and cracking process were all found out.In a word the studying result has the certainly practical value to the this kind of bridge system design .