The Design And Construction Of Continuous Girder Bridge Transformed From Simply-Supported Structure

This thesis aim at The developments circumstance of the high grade highway inour country and effective demand etc. problem of midding span of bridge developments ,especially in 1 October 2004, 《General Code for Highway Bridges and Culverts》( JTG D60-2004) and 《Code for Design of Highway Reinforced and PrestressedConcrete Bridges and Culverts 》( JTG D62-2004) promulgation with puts intopractice , originally research can't accord with the new norm incompletely, so putforward the problem of prestressing concrete Continuous Girder Bridge Transformedfrom Simply-Supported Structure and discussed the term of prestressing concreteContinuous Girder Bridge Transformed from Simply-Supported Structure .it is themethod that whole beam prepared, then installed, placed tie-in, pulled the steel afterconcrete attaining the streth requird to realize construction continuing method, we saythe construction method is prestressing concrete Continuous Girder Bridge Transformedfrom Simply-Supported Structure, this kind of construction method formation thesystem be intituled prestressing concrete Continuous Girder Bridge Transformed fromSimply-Supported Structure. By referring to the domestic and international a largequantity literature ,holding domestic and international research present condition aboutit, with actual engineering —ShuiNan viaductin in TuMei to HunChun superhighway( the 5-40 m prestressing concrete Continuous T-Girder Bridge Transformed fromSimply-Supported Structure ),determined textual research contents as the design projectand construction craft of prestressing concrete Continuous Girder Bridge Transformedfrom Simply-Supported Structure in the seasonal freezing region.After introducing basic theories of prestressing concrete Continuous T-GirderBridge Transformed from Simply-Supported Structure, pattern and designing thecharacteristics of prestressing concrete Continuous T-Girder Bridge Transformed fromSimply-Supported Structure, analyzed the performance of mechanics of prestressingconcrete Continuous T-Girder Bridge Transformed from Simply-Supported Structure, Itis that there is no support setuped when placing concrete. The load of concrete andconstruction load and itself is putted the prepared beam. this is the first stage of force.after the concrete attain to certain strength here, prepared beam concrete and behindsprinkle concrete will became combined beam, together suppored an usage for loadetc., the force consulted from load is carried by combination section, this is the secondstage of force. |So, the calculating of dead load of prestressing concrete ContinuousT-Girder Bridge Transformed from Simply-Supported Structure is connected with theconstruction method. Because of the construction system converts, internal force graphis undifferent between considering the in proper order calculation of construction andthe final construction calculation the self-respect . its reason is the petit internal forceconsulted from shrinking of concrete , secondary distribution of internal force andwire-rope strand ,therefore it should compute monment diagram includeing the abovefactor in the inside, just compare completely.When It is supported free beam ,It iscomputed by characteristic of supported free beam, when it is continuous construction,It is computed by continuous construction, press consecution construction theproceeding the inside dint computes, among them in system convert stage, shouldaccount into remove temporary accept causablely dint, the main beam carries the endcurved should be added by each stage inside dint but. realized basic theories of prestressing concrete Continuous T-Girder BridgeTransformed from Simply-Supported Structure, pattern and designing the characteristicsof prestressing concrete Continuous T-Girder Bridge Transformed fromSimply-Supported Structure with actual engineering —ShuiNan viaduct in TuMei toHunChun superhighway ( the 5-40 m prestressing concrete Continuous T-Girder BridgeTransformed from Simply-Supported Structure ),. based on the calculate principiaprescribed of limit condition of carrying ability and limit condition of usually use in《General Code for Highway Bridges and Culverts 》( JTG D60-2004) and《Code forDesign of Highway Reinforced and Prestressed Concrete Bridges and Culverts 》( JTGD62-2004),analyzed,calculated,checked it,Validated the rationality of prestressingconcrete Continuous Girder Bridge Transformed from Simply-Supported Structure,studied the variety of temperature, shrinking of concrete, creep of concrete under theconstruction craft. Stress distribution is uniform, empress convert construction systemas again continuous the construction sequence of the system next, cut the top andbottom should the dint distribute more even, differ not very, all for press should dint, theconstruction is placed in the even suffering presses the appearance, suffering the dint tothe construction more emollient, each item should the dint limit value all within thescope of the norm allows, also certainly of the safety stores. From but verify thisdesigns the project puts forward of prepare in response to the dint concrete a rationalityfor turning continuous bridge construction. Finally with actual engineering —ShuiNan viaductin in TuMei to HunChunsuperhighway ( the 5-40 m prestressing concrete Continuous T-Girder BridgeTransformed from Simply-Supported Structure ),put forward the design project andconstruction craft of prestressing concrete Continuous Girder Bridge Transformed fromSimply-Supported Structure in the seasonal freezing region. passing above, put forward the construction sequence: first placed the continuoussegment after the beam installing,pulled the steel, backouted the temporary support,then placed the bridge deck and deck covering。 in a word,this thesis completely analyzed the infection of prestressing concreteContinuous Girder Bridge Transformed from Simply-Supported Structure added byfactor during the period of construction and carrying。The studying result has the...