Full-scale Test Model Design On Cable-pylon Anchorage Zone Of Wu Jiang River Bridge

Relying on the Wujiang River Bridge of the highway between Zunyi and Guiyang,the finite element model of bridge upper pylon anchorage zone used in the overall analysis was firstly introduced.The working performance of the overall model under the design cable force was simulated by the ANSYS.Based on the most disadvantaged principle,the anchorage zone segment section was determined by considering the multi-aspect factors such as the design of cable force,cable angle and the overall stress superposition effects.The anchorage zone segment was respectively extended upward and downward for a certain distance to ensure that the structural stress was less affected by the simulated boundary conditions.Simultaneously,equivalent loads of prestressing force,cable force and gravity of the real bridge model were applied to the anchorage zone segment with different heights.Comparing the FEM analysis results between of the anchorage zone the real bridge,the segment height of equal cracking ability as the real bridge model was confirmed for the need of the full-scale model test.In addition,the test needs to simulate the conditions of cable breaking and partial loading and the section model base was typically designed and analyzed by finite element in order to ensure the cable force can be transmitted to the anchorage section of the cable tower effectively.Finally,in the light of the whole test,this paper gives a detailed description of the test procedure,loading plan,necessary equipment,and the arrangement of the measuring points of the strain gauge,which provided the guarantee for the follow-up test...