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| Analysis of Combination Effect of Beam-arch of V-shaped Rigid-frame and Arch Structure Combined Bridge |
| GONG Jun-hu, WANG Hua-cheng, HUANG Bei-ping |
| China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei 430063,China |
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Abstract Research purposes：The V-shaped rigid-frame and arch structure combined bridge is formed by connection of slant legs of main span of V-shaped pier continuous rigid-frame with the arch abutment of concrete-filled steel tube arch. It has the feature that the arch and V-shaped pier continuous rigid-frame bear the load together and its performance of the structure is different from general beam-arch combined bridge. The research is done to reveal the combination effect of beam-arch of the combined bridge.
Research conclusions：Because of the enforcement effect of arch rib on V-shaped pier continuous rigid-frame, the maximum bending moment and deflection of the middle span of rigid-frame and arch structure combined bridge under effect of the active load decrease by 50%, the deflection of the middle span caused by the concrete creeping and shrinkage in the later stage is 12% of V-shaped pier rigid-frame bridge and the vertical stiffness of V-shaped rigid-frame and arch structure combined bridge is 2.56 trimes of V-shaped rigid-frame bridge, so the combination effect of the beam-arch of V-shaped rigid-frame and arch structure combined bridge is very obvious.
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Received: 27 October 2009
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2010, Vol. 27 
