Cable-stayed-composite Beam Bridge Mechanical Properties And Experimental Research

In recent years,with the rapid development of the transportation industry and science and technology,the structure of cable-stayed bridges has also changed with each passing day.Engineers strive to find a new type of cable-stayed bridge structure with reasonable structural design and clear mechanical performance.The cable-stayed-composite beam bridge came into being under this background.This paper relies on theoretical derivation,computer simulation and experimental verification to study the key mechanical indicators of the newly proposed cable-stayed-composite beam bridge.The main research contents are as follows:(1)Consult a large number of relevant literature at home and abroad,the advantages and disadvantages of existing cable-stayed bridges are summarized,and the cable-stayed composite beam cable-stayed bridge meeting the engineering needs is proposed.(2)Based on the basic calculation theory of cable-stayed bridge,five mechanical principles of cable-stayed composite beam bridge are summarized.(3)Using MIDAS/CIVIL to build a cable-stayed composite beam bridge with a main span of 500 m and a control cable-stayed bridge.The vertical deflection of the main beam,the stress of the main beam,the bending moment of the pylon,the cable force and the stability are analyzed in detail.(4)Using MIDAS/CIVIL to build a cable-stayed-composite girder bridge with a main span of 1200 meters,and study and explore the ultimate mechanical performance of the cable-stayed bridge under this structure.(5)Further research and analysis on the parameter sensitivity of the cable-stayed-composite girder bridge,and summarized the more reasonable structural parameters of the cable-stayed-composite girder bridge under the condition of the main span of 500 meters.(6)Construct a test bridge with a calculated span of 6+10+6m,conduct static load test and pulsation test,compare and analyze theories and test data,and verify the rationality of the cable-stayed-composite beam bridge.(7)Analyze and summarize the construction methods and construction experience of the existing cable-stayed bridges,and make a theoretical introduction to the construction methods adopted in the actual bridge construction of the cable-stayed-composite beam bridge.