既有空心板梁受力性能分析

Prestressed Concrete Hollow bridge type used in highway bridges has an advantage of economy and convenient construction. More typical disease of the hollow plate girder is "the veneer force" from hinge joints longitudinal cracks,caused serious impact on the durability and safety of the structure,and even collapse occurred. In this paper, from a bridge engineering practice, it is envisaged that the prestressed hollow plate girder bridge collapse, analysis the various possibilities. Analysis includes a review calculation of the original design;The calculation was according to the specification requirements of the hinge seam force (including steam super -20, heavy vehicles); heavy vehicles across the bridge (the veneer force, Hinged force) influence on security and load test. The calculations show that the original small hinge seam force meet the requirements of heavy vehicles cross the bridge when calculated in accordance with the hinged plate , but if the hinge seam failure, can not meet the requirements under the veneer force.