Disposition Method Of Pre-Stressed Steel Bunch With Continuous Box Beam In Unequal Span

The pre-stressed concrete continuous bridge, because its terrain compatibility strong, design and construction technology mature, it is large to cross over ability, the construction cost is reasonable, in recent years it is used widely. It has already become the main bridge type of pre-stressed concrete bridge. It has the structure stress performance well, distorts light, the expansion joint few, the driving steady comfortable, the modeling succinct artistic, amount of project maintained little, the earthquake resistance ability is strong and so on the characteristic. The pre-stressed concrete continuous bridge in its bridge plan definite process, frequently must act according to the concrete project actual to select equal span or unequal span, the constant section or the variable section and so on each kind of different type, Through the scheme compared, confirming superior bridge type scheme.This article mainly aims at the Disposition process of pre-stressed steel bunch of unequal span continuous box beam which has the same height and unequal span length. The method mainly is carries on the unit division to the project example, the pre-stressed steel ties carries on the estimate, In view of matches differently steel ties, applying the"bridge doctor"software, proceeding the structural right section intensity Checking computations and the stress Checking computations under ultimate limit states as well as under serviceability limit states.This article mainly explain from following respects: the choice of scheme of bridge type, the reason and method to unequal span length bridge, the estimation , disposition method and checking computations of pre-stress steel about unequal span length bridge, and so on. Through recommend the process and the conclusion of estimation, disposition method, the checking computations of pre-stress steel bunch about unequal span length continuous box beam, this article offers a feasible design method to project designer, for everybody's reference.