The Theory Of Continous Rigid Frame Bridge Control And The Application

With the development of science technology and traffic enterprise, the prestressed concrete continuous rigid frame bridge has been growing up rapidly in the recent years with it's unique predominance of handy construction, economical cost, reasonable internal force and comfortable traveling. It almost has become the first selective bridge style when the main span is in the range from 100m to 300m. During the cantilever construction of the prestressed concrete continuous rigid frame bridge, the beam axis shape of formed blocks can not be regulated during the next constructions. For the construction of the bridge is all right and the beam axis shape is exactitude for design, for internal force of the beam is appeased by design request, must to work about bridge construction control during the bridge construction.On the basis of the yi-li bridge of xing-jiang province, this paper used prbp to analyze the bridge structure, ascertained the sensitivity of the design parameters, and identified the design parameters through experiment. Based on this, according to the differences between the design value and the survey value, adjusted the primary design parameters by least square method to make the calculated accords with the actual value. It had been proved that this control was successful and the setheories and methods had highly practical effect on construction control of the prestressed concrete continuous rigid frame bridge. The researches of this paper will become the bases of the further research in the same aspect.