Several Key Technology Concrete-filled Steel Tube Arch Bridge

CFST arch bridge is a bridge construction in recent years, the development of new technology, is a long span arch bridge of an ideal structure. On the steel concrete in bridge applications, while addressing the bridge and construction of high-strength material applications two major problems, so that bridge is more compact, more expressive but also, to bridge the development has injected new vitality. Therefore, the steel arch bridge in China's rapid development, China's construction of a large arch. In architectural form under the arch bridge excellent bridge in the city are often the favorite to become the city's landmark building, is still the larger span, the direction of larger scale development, application areas and are expanding the scope of.In recent years, a number of objective and subjective causes of bridge collapse occurred, causing serious casualties and economic losses, caused widespread concern in engineering and attention. Steel arch bridge of many test results show, the design and construction reasons, dumbbell-shaped structure of steel arch bridge, there are some security risks, the paper tube arch bridge of two finite element modeling and experimental testing of data processing and analysis, respectively Hanger Force detection, short rib injury and steel drums boom tube has been studied with three of the main achievements made the following points:1, Described the current process of the construction and operation of Cable Force Measurement Arch Bridge and the basic principles of main method, which focuses on string vibration method Hanger Force in the application of the test was studied, considering the cable boundary conditions stiffness, damping ratio, slenderness ratio on the vibration frequency of the proposed formula for calculating the corresponding cable tension. Yellow---Main Bridge Deck Arch Bridge under the engineering support, through the measured value and theoretical value of the error analysis to verify the practicality of cable force calculation formula for operators in the arch provides the sling force test a basis and reference.2 To rely on the Yellow River Bridge for the project, from the analysis of structural behavior and the boom boom Injuries starting to study the damage to the bridge boom static, dynamic and stable performance, the results indicated that some damage will boom adjacent boom led to redistribution of internal forces, lower natural vibration frequency. With arch bridge, with the collapse occurred the actual situation, focusing on the short bar on the structure and properties, the need for strengthening the conservation boom and the corresponding conservation countermeasures.3, Proposed to simulate the semi-rigid tube at the rib section of the drum method, the tube on the steel drum concrete rib arch bridge static and dynamic performance, and through a steel arch bridge in the experimental measured data to be confirmed, the results showed that the arch of the bridge tube drum static and dynamic properties of large steel drums pipe arch bridge will make the vertical rigidity of the lower section of the bridge structure, bending under pressure significantly decreased, the structure of the safety margin reduced, should cause attention.