Study For Rigid Relationship Between Piers And Beam Of Continuous Rigid Frame Bridge On The Influence Of Temperature

In this paper, I have analyzed the distortion of continuous rigid frame bridge at the condition of temperature uniform change by displacement method and finite element method computer aided design program-SAP91. It included: the distortion and inner force condition at the bottom of single pier when it is consolidated, the distortion and inner force condition of thin double piers-rigid frame bridge; the distortion and inner force condition of thin double piers-rigid frame bridge when the consolidation is elastic consolidation and confinement adopted different rigidity factor; and the inner force condition of thin double piers-rigid frame bridge when the distance of piers is different.By analysis and compare to continuous rigid frame bridge at the condition of temperature uniform change, I found the bending moment change of pier either single pier or thin double piers takes a increasing trend with the ratio of beam bending rigidity and pier lateral displacement rigidity. The bending moment has a extreme value when the ratio of rigidity very small (a constant). And in the condition, the structure inner force changes in the pier which mainly takes bending at first and takes bending and shearing force at last. The structure shearing force takes a one-way increasing trend with the decrease of ratio of beam bending rigidity and pier lateral displacement rigidity and the increasing rate is bigger. When the consolidation at the bottom of pier is elastic consolidation and the structure force is bigger the extreme value mentioned at the above, the structure force will take a increase with the decrease of ratio; and when the structure force is smaller the extreme value, the improvement of the inner force at the bottom of pier is distinct adopting elastic consolidation and bending of at the top of pier and beam will has a great increase. When adopted different pier distance, the pier inner force change is very small and beam inner force bending change is bigger. The beam bending will has a great decrease with the increase of pier distance.