The Construction Mechanics Influence Analysis On Prestressing Effect Of The Cast-in-place Prestressing Concrete Frame

As speedy development of the building industry, More and more multi-high-level pre-stressed structural engineerings are put into construction. Conventional structural analysis on these engineerings, regarding the structure in partial components, its result sometimes is to unsafe.Through analysis to a complex multilayer cast-in-place prestressed concrete frame construction project, the article analyzed structure endogenic force and the distortion response appeared in the construction stage, which are not symbol with the design value. Concrete is:Using PK module of the software PKPM to establish a single-row and multi-layer frame construction, has analyzed the influence of frame column and the effective prestressing force of the beam when the construction uses different construction orders; Using the finite element software MIDAS to establish a single-layer and five rows frame construction, has analyzed the influence on side beam when the construction uses different tension orders and determined reasonable tension plan;Finally using the finite element software ANSYS to build a 35m single-span prestressed beam,which has 2 rows and 4 bunches of prestressing muscles altogether, has analyzed the lateral bending appeared in the tension precesses of the muscles and the arrangement influence of the orders on the beam stress simply. Through the above specific analysis, we can discover, regarding to the complex multi-high-level pre-stressed project, uses the whole one-time load-on method to computate pre-stressed function influence on the structure has a bigger deviation with the actual influence produced in real construction processes,it's urgent and essential to carry suitable construction stage endogenic force checking computations.