Abstract
The boom tension of the tied arch bridge has a great influence on the state of the bridge, which is the key monitoring project in the construction stage. In this paper, a concrete-filled steel tube arch bridge with a span 60m is taken as an example. Based on the theoretical analysis of boom tension of tied arch bridge and the test of construction process, the following results are drawn: in the construction stage, the suspender tension is reasonably controlled to achieve the expected goal of the construction period. The cable force in the finished stage basically coincides with the design expectation. When the bridge is completed, the error precision control of boom tension is better, which ensures the safety of the bridge in the operation stage.
Highlights
The boom tension of the tied arch bridge has a great influence on the state of the bridge, which is the key monitoring project in the construction stage
A concrete filled steel tube arch bridge with a span 60m is taken as an example, The facade arrangement of this tied arch bridge is shown in Figure 1, calculation vector height is 12m, ratio of rise to span is 1/5, and vertical and horizontal beam system is adopted for bridge deck structure. 10 sets of booms are set in each of the arch ribs, one-end tension, tension at the top of arch rib, the fixed end is arranged at the bottom of the tie beam
The boundary conditions are as follows: the bottom hinges of the full framing, hinges at both ends of the arch, the cast-in-place bridge deck unit is consolidated with the tie beam and crossbeam
Summary
A concrete filled steel tube arch bridge with a span 60m is taken as an example, The facade arrangement of this tied arch bridge is shown in Figure 1, calculation vector height is 12m, ratio of rise to span is 1/5, and vertical and horizontal beam system is adopted for bridge deck structure. 10 sets of booms are set in each of the arch ribs, one-end tension, tension at the top of arch rib, the fixed end is arranged at the bottom of the tie beam. A concrete filled steel tube arch bridge with a span 60m is taken as an example, The facade arrangement of this tied arch bridge is shown, calculation vector height is 12m, ratio of rise to span is 1/5, and vertical and horizontal beam system is adopted for bridge deck structure. 10 sets of booms are set in each of the arch ribs, one-end tension, tension at the top of arch rib, the fixed end is arranged at the bottom of the tie beam. Boom: The whole bundle extrusion cable system of OVM.GJ15-12 steel strand is used. The supporting anchorage is A (fixed end) and B (tension side) set of anchorage for the whole beam of OVM.GJ steel strand, the standard strength of the hanger is fpk=1860MPa, and the breaking tensile force is 3125kN.
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