The Design Of A Cable-stayed Bridge Analysis

In this paper,the static calculation analysis,wind resistance analysis and seismic calculation analysis of Minjiang River Bridge are carried out by MIDAS / Civil2013 software.Static analysis is divided into two parts: integral calculation and local calculation.The overall calculation includes the calculation of the bearing capacity of the persistent condition,the calculation of the normal use limit state and the calculation of the persistence condition.The local calculation includes Z1,Z2 cable segment result analysis,the main beam 0 block numerical analysis and the main tower anchor area numerical analysis.Wind analysis includes basic wind speed determination and flutter stability analysis.The seismic analysis is divided into response spectrum analysis and time history analysis.The cable-stayed bridge is discussed separately under the action of E1 and E2 earthquake,and it is checked whether the indexes meet the requirements.In the calculation of the bearing capacity of the persistent condition,the flexural capacity of the normal section and the bending capacity of the oblique section meet the requirements.Normal use limit state calculation,the normal cross-section crack test,oblique section crack test,the main beam deflection check and the main tower displacement(along the bridge and cross bridge)check to meet the specificationsIn the calculation of the persistence stress,the compressive stress of the normal section of the concrete and the calculation results of the compressive stress of the oblique section meet the requirements of the specification.Z1,Z2 cable section of the calculation,the longitudinal stress of the cable,the main column of the main tensile stress and the main beam of the main compressive stress calculation to meet the specifications.In the numerical analysis of the main beam 0 block,the main tensile stress and the main compressive stress of the main beam 0 block all meet the specification requirements.In the numerical analysis of the anchorage zone of the main tower,the main tensile stress and the main compressive stress calculation results of the main tower anchorage zone meet the specification requirements.In the study of seismic calculation,the results of each element of E1 and E2 are analyzed by the response spectrum.The displacement of the pier is observed under the action of E2,and the results meet the requirements.By time analysis,the effects of E1 and E2 are analyzed respectively The top position of the pier and the position of the pier,the top of the pier to meet the requirements,the pier state in the state of elastic cracking or into the plastic state but did not reach the first yield state.In the study of wind resistance calculation,the basic wind speed,the design reference wind speed and the structural dynamic characteristics are calculated and calculated,and the stable wind speed is calculated and the flutter stability is ensured.