Analysis Of Full-scale Model Test For Steel Anchor Beam-steel Corbel Composite Pylon Anchorage Structure

The anchorage structure of cable-stayed bridge is an important tectonic for delivering thelocal concentrated force of cables to total cross section of tower, safely and evenly. On thebasis of collecting relevant information and carrying out in-depth analysis, the mechanicalproperties, force transmission mechanism and the ultimate bearing capacity of a steel anchorbeam-steel corbel composite pylon anchorage structure have been studied, by thecombination of full scale model test and finite element simulation analysis which was takingXiamen-Zhangzhou sea-crossing bridge north branch bridge as background. The main studycontents of this paper as follows:First, the research status of the various types of anchorage structure was reviewed. Thecommon anchorage forms and its application of concrete pylon was also described.The segment of the steel anchor beam-steel corbel composite pylon anchorage structurewhich the cable forces of horizontal and vertical component was the largest had been selectedunder the bridge dead load state for full-scale model test. The forced state was simulatedunder finished bridge state, cable replacement state, operating condition and overloadcondition respectively. The law of stress change and crack development of the steel anchorbeam-steel corbel composite pylon anchorage structure had been studied in the test. Theresult showed that there was a large safety reserve of the steel anchor beam-steel corbelcomposite pylon anchorage structure.By finite element simulation analysis, the load transfer path of the steel anchor beam-steel corbel composite pylon anchorage structure had analyzed clearly. In order to study thedistribution relationships of the force between steel corbel and concrete tower column, theshear studs and PBL shear connector etc., the transfer mechanism of this anchor structure wasstudied by finite element model. At last, ultimate bearing capacity of the steel anchor beam-steel corbel composite pylon anchorage structure had been analyzed by using nonlinear finiteelement analysis.