Study On Evaluation Of Load Bearing Capacity For Dukou Bridge In Pan-Zhi-Hua City

Various diseases in highway bridge can arise after certain tenure of use, and it is very important to evaluate the actual bearing capacity and disease degree of the bridge in bridge maintenance and highway management. But because of the limitation of detention means, the various bridge types and the completions of the structure, the evaluation work is always a difficult topic.This thesis details the detention for Dukou Bridge in Pan-zhi-hua city .Du kou Bridge is an steel arch bridge with history of 35 years, and plays an important role in the city .Because the bridge detention is taken under no current specification and standard to be and the disease is very complicated ,the detection work is very difficult.Seven chapters are included in this thesis .The first chapter is the introduction about the necessity of bridge detection and common defect of the bridge .The second chapter introduces the structural basic condition and defect details of the bridge .The third chapter describes the preparation for the detection work .including the overall investigation of the diseases and the condition at operation ,the set-up of loading test and control measures and structural computation .The 4th chapter is on-the-site detection ,which consists of static and dynamic tests and necessary data collecting for analysis and evaluation .The 5th chapter is the analysis of detention data .According to collected data of loading tests, the results of static and dynamic tests are analyzed .The 6th chapter evaluates the strengths ,rigidity .stability and dynamic characteristics of the bridge, so that the conclusion can be reached .The 7th chapter is summarization. It describes the working characteristics and contents of this project, and points out the problems and future in exiting bridge detection.At the same time ,through the research work of this detection ,there has formed a set of detection and evaluation methods of exiting steel bridge, namely investigating disease and operation condition .calculating and analyzing realistic condition .establishing test scheme .control measures of loading .loading test and comprehensive bridge expect analyzing and evaluating. This correct detection and evaluation method can offers reference to the detection and evaluation of related bridges ,and to the establishment of related bridge detention technical specification and standard.