V-supported Prestressed Concrete Continuous Rigid Frame Bridge Spatial Analysis And Experimental Study

In recent years Prestressed Conerete and Continuous Rigid Frame Box with V Pier bridge's application is more and more widely. As a result of the V-support system, making this type of bridge structure more rational by the force, greatly improved structural stiffness, structural size can be reduced, thereby reducing the project cost and the hight of bridge. It is these qualities have aroused the interest of many scholars and research.According to Prestressed Conerete and Continuous Rigid Frame Box with V Pier bridge, Use finite element theory of space for their spatial analysis to study the characteristics of the bridge spatial effects and changes in the law of force; Combinating loading test to explore the structure dynamic characteristics and the corresponding vibration mode of V-supported prestressed concrete continuous rigid bridge; Use the partial analysis of the V-support to research influence of vertical angle of V-supported to the full-bridge force characteristics, study influence of vertical angle of V-supported and the proportion of inter-span on V-Pier Top of the impact of the law of force.The results showed that: the space finite element model can more accurately reflect the actual structure of cross-section characteristics, the results of the calculation is near to the actual situation. Distribution of V-supported prestressed concrete continuous rigid frame bridge stress is very uneven, and with the vertical cross-section location, the wide cross-bridge cross-over support and load conditions change, spatial effects is very significant effected; in the corresponding control section loading conditions, the cross-section of the space points with the theoretical value is closer to the measured deflection values, the same cross-section can reflect the different deflection with the measuring point changed, This shows that the theory of finite element space can be very effective analysis of prediction of box-girder bridge behavior. the stress distribution of V-supported part is very complicated. Because of the V-supported, the bridge reflect the characteristics of arch bridge. With the decreased of the vertical angle, the arch effect increases. In the impact of top-level pier thrust factors, when to increase or decrease the side span, the level and trend of the moment has increased, reflected characteristics of the oblique rigid frame legs. Analysis showed that selected at the point of view of the bridge pier case the value of the top moment, are the smallest level of force, so this design is reasonable. Vertical bending vibration of the bridge tothe main theoretical calculation and measured the frequency of the fundamental linefrequency.