Structural Analysis On A Curved-pylon And Curved-Girder Cable-stayed Bridge Without Back Stays

Compared with conventional cable-stayed bridge without back stays, the main tower ofcurved tower cable-stayed bridge without back stays beams are curves, structural systemscomplex and innovative, tower detail treatment、mechanical properties and behavior oflong-term effects features unique. With the research background of Pear River Bridge inDongguan, according to structural characteristics, construction and use phase based on themechanical performance of systems analysis.The main contents are as follows:(1) Based on finite element theory for curved tower cable-free curved beam back thestructural characteristics of cable-stayed bridge, the whole structure proposed in the finiteelement analysis of static on the main girder, towers, cables, prestressed beamconstruction model approach, making clear the body of local analysis, choice of isolation,quarantine body block element and prestressed beam simulation approach.(2) Based on the no dorsal column characteristics of curved beams curved cable-stayedbridge tower mechanical, establish a full-bridge model of the cable-stayed bridge by spatialanalysis software of Midas, prestressed concrete steel tower in all conditions.The mechanicalproperties and variation of steel made in optimizing the stress distribution of concretemethods.(3) Used for the tower pier beam characteristics of the consolidation program, the use ofANSYS solid model of the tower pier consolidation area3D FEM analysis finite elementanalysis model of precision, the structure reveals the consolidation zone under the mostunfavorable stress level by the force area, verified that the Simulation of temperature droptendons correctness of the actual stress.(4) Aim at the structure characteristics that the hollow prestressed concrete steel tower.Built construction of local fine analysis model to analyze by ANSYS segmental The role ofsteel cables under concrete in plane stress conditions, clear steel hollow prestressed concretebridge pylon along the plane to the stress level.