Analysis of Crashworthiness Performance of Continuous Steel Box Girder Viaduct Column Assembly
Taking the new construction project of S7 Highway(Yueluo Highway Baoqian Highway)as the research object,this study investi-gates the construction and quality inspection of assembled bridge piers.Firstly,the prefabrication of elevated bridge columns is completed through steps such as steel reinforcement treatment,template assembly,and concrete pouring.Then,the prefabricated columns after accept-ance shall be transported to the construction site,and the elevation of columns shall be adjusted for assembly after the joint bars and cushion caps are processed.Finally,the impact resistance and stress under different loads of the column were tested using ABAQUS finite element soft-ware.The analysis results show that the column did not show significant damage at the location of the impact when the impact velocity was low;When the impact speed is high,the position where the column is hit and the back of the impact position show significant deformation,and the column as a whole even undergoes deformation.This indicates that after the impact occurs,stress waves are transmitted in the column,causing damage to the inside of the column.This shows that the column can withstand low-speed vehicle impacts but cannot resist high-speed vehicle impacts,and can withstand large loads,which meets the requirements for the use of elevated bridge columns.The experimental simulation re-sults of stress changes in columns under different loads are close to the actual measured values,indicating high accuracy of the test.At the same time,the test results comply with the"Code for Acceptance of Construction Quality of Concrete Structures",indicating that the stress changes of the column under load are within the normal range,indicating that the bearing capacity of the column is strong.At the same time,the residual strain of the columns under the two types of loads is relatively small,indicating that the stress state of the columns is relatively nor-mal and can meet the actual needs of the elevated bridge.
S7 highwayAssembled bridge piersPrefabrication of columnsAssembly constructionQuality inspection
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