Confirmation & Implement Of Reasonable Bridge-completed State Of PC Continuous Rigid Frame Bridges

The reasonable bridge-completed state of PC continuous rigid frame bridge,includes not only a reasonable stress state when bridge construction completed,but also a stress state which ensure the construction safely and reasonably,and which accord with industry norms,to meet accommodate time-varying effect and meet the long-term use.My paper researches confirmation & implement of reasonable bridge-completed state of PC continuous rigid frame bridges on the basis of Maopizi&Apengjiang two PC continuous rigid frame bridge.This paper introduces the characteristics and status of PC continuous rigid frame bridges,elaborates present relevant studies on reasonable bridge-completed state,compares present usual design method aimed on strength and “zero moment” design method aimed on deflection.Meanwhile,this paper clarifies definition of reasonable bridge-completed state,lists influence factors of bridge-completed state,classifies reasonable bridge-completed state of PC continuous rigid frame bridges.By means of finite-element method modeling,this paper calculates dead load moment feasible region,estimates whether key control sections accord with reasonable bridge-completed state or not.At the same time,this paper researches influence on reasonable bridge-completed state of pre-arch,jacking force,bob-weight etc measures,and discusses implement of reasonable bridge-completed state.