Research On The Secondary Internal Force Of Multi-span Continual Rigid Frame Bridge

Recently, based on the economic development of our country, many long span prestressed concrete continuous rigid frame bridges are built. With the establishmentof this type bridge, many researches paid great attention on the secondary interior force. The study on this field have already advanced very much, however, there are few analysis about the influence of secondary interior force on long span prestressed concrete continuous rigid frame bridges combined with actual bridge.This paper has introduced the basis of the principle and the caculating methods of the secondary internal force caused by temperature, prestressing force, shrinkage-creep and support sink.Based on a bridge, applying the soft of MIDAS/Civil, studied the secondary internal force caused by temperature, prestressing force, shrinkage-creep and support sink. Through the result, some conclusions are put forward .The research of the paper could be the references for other designer to consider the effect of the secondary interior force into the real design works.