Analysis And Research On Temperature Effect Of Prestressed Concrete Continuous Beam Bridge

The influence of temperature is an important factor in the arising of bridge collisions and an important factor disturbing the engineering project.Nowadays,with the construction and development of high-span and long-span prestressed concrete continuous beam bridges,there are more and more vehicle rollovers and traffic accidents due to temperature problems.The impact and harm of temperature stress on concrete structures,It must be widely recognized and valued by the engineering community.Based on the knowledge of the bridge and the extensive reading of the literature,this article systematically discusses the factors that affect the temperature distribution,the theory of temperature load solution,talking the important ingredients of the distribution of temperature,the temperature chance for the bridge of interior influencing and the influence of upper part structure box girder at unequal temperature.Taking the actual project of big buddha temple bridge from the expressway of Jinan to Tai an as an template,with regard to composition internal force and displacement morph for temperature is researched systematically.Through the finite element software Midas civil,analysis the difference of the code of the home and abroad on the ladder of temperature,under different codes and the same location of continuous beam to compare the affect of the ladder of temperature,and analyze and summarize the changes And distribution.The realization of the main process is based on the actual project Jinan-Tai an expressway big buddha temple bridge as a research background,using Midas Civil to establish a spatial beam element model and numerical simulation,the bridge's superstructure box beam is divided into 61 nodes,at the node In the study selection,the unit is selected as the examination target,and the upper part force,the lower part force of upper part structure box girder and the upright disturbance of upper part structure box girder under 60 different elements under different temperature loads are analyzed one by one.The influence of the overall temperature rise and fall on the internal force and the internal force of the bridge fold stage are summarizedBy summarizing and summarizing the above research,the distribution of bridge forces and the most unfavorable position after bridge formation under temperature load are discussed,as well as the issues that need to be paid attention to in the project.This is dangerous for the subsequent actual engineering in the design and construction of the bridge Avoidance has certain reference and use value.